CHAPTER V.

Chapter 1046,415 wordsPublic domain

_The Oases and the Geology of the Nile valley, by Mr. H. J. L. Beadnell, F. G. S., F. R. G. S._

40. =The Oases.=--The chief oases[6] of the Libyan desert--Dakhla, Kharga, Baharia and Farafra,--occupy extensive depressions cut down through the horizontal Eocene strata[7] to the underlying saddle of Cretaceous rocks; some of the more porous beds of the latter are water-bearing and from them, either through natural passages or through artificial borings, the water rises to the surface, often under considerable pressure. The floor level varies considerably but the cultivated lands in general lie between 70 and 115 metres above sea level.

[6] See Geological Survey reports, P.W.M., Cairo.

[7] With the exception that Dakhla is almost entirely cut out in Cretaceous strata.

41. =Dakhla oasis.=--This, by far the most important and prosperous of the Egyptian oases, lies three days’ march west of Kharga, or about 300 kilometres due west of Armant in the Nile valley. The site is a depression lying at the foot of the great east and west Cretaceous escarpment, bounded to the south by the undulating desert of Nubian sandstone, which stretches unchanged almost to the heart of the continent. The inhabitants of Dakhla, numbering over 17,000, are distributed among 12 villages and form a practically self-supporting community. The cultivable land within the oasis (400 square kilometres) amounts to nearly 50,000 acres, of which one half is under cultivation; in addition several extensive areas of alluvium covered ground exist outside the oasis proper, notably on the Gabbari road between Dakhla and Kharga. Owing to the difficulty of drainage, salines, saltyland, marshes and pools occupy some 7,000 acres.

There are nearly 130,000 adult palm trees in Dakhla, a large export trade in dates being carried on with the Nile valley; the finest crops of wheat and barley are raised, while the fruits of the oasis, oranges, apricots, mulberries, etc., are abundant and of excellent quality.

Taxes are levied as follows:--(1) Mature date-palms are taxed 1¹⁄₂ piastres each per annum; (2) Modern wells (i.e. biyâr, made with the existing boring plant) pay 50 piastres per annum per qirat of water; (3) Ancient wells (aiyûn) pay the same, except that in some cases those used for irrigating palmgroves are exempt. There are 7¹⁄₂ trees and 1¹⁄₂ acres per inhabitant, and the total tax paid by the community is about £E. 2,500.

The water-supply of the oasis is derived from an underground bed of sandstone, 55 metres thick, underlying a dense impervious red clay 45 metres in thickness; the upper part of the latter is conspicuous throughout the oasis, underlying the alluvium and forming the base of the surrounding escarpments in many localities. Below the water-bearing sandstone lies a black clay, never yet penetrated by the boring rods; it is probable that other water-tables exist below and such would be invaluable for the irrigation of those parts of the oasis where the present supply is unsatisfactory. There seem to be no natural springs extant at the present day, the whole of the water-supply being through boreholes, both ancient and modern. The old wells, known as _ain_, _aiyûn_, appear to be mostly of early Egyptian and Roman construction, and number over 400; exactly similar wells have been sunk by boring plant during the last few decades and are called _bîr_, _biyâr_; there are over 160 of these; all are true artesian wells. At the present day the method in vogue is as follows:--a two metre square timbered shaft is sunk by hand to the base of the red clay and within this is built up a watertight wooden pipe, 35 cm. in diameter, made of ‘sunt’ (a species of thorny acacia), the surrounding space being packed with clay. Sinking is continued in the sandstone with the boring machine until a satisfactory flow of water is obtained. Many of the older wells in the oasis have become choked up, and although some have been successfully cleaned out by the inhabitants, but the process is costly and laborious and frequently fails. The work is done by divers, a small but hardy class only found in Dakhla and Farafra.

The output of wells is determined in a somewhat rough and ready manner by measuring the depth of water passing over a weir fixed in the stream. It is reckoned in qirats, one qirat being a water-section of 64 square centimetres; from some test observations in Kharga Dr. Ball deduced the average value of a qirat, as measured in that oasis, as 230 litres a minute. The total water-output in Dakhla (1096 qirats) may thus be taken as approximately representing a discharge of 132 million cubic metres per annum, and taking the cultivated lands as 25,500 acres the duty is 6,130 acres per cubic metre per second. That the water-supply could be largely increased, and the limits of cultivation greatly extended, admit of no doubt, but with the free hand accorded the natives during the last few decades a considerable amount of damage has been done throughout the oasis by the injudicious sinking of wells. Promiscuous boring is fatal, and strict and efficient control of all boring operations imperative. Considering the number of wells abandoned owing to a slight fall in the water-level having caused them to cease running at the surface, the importance of lifting appliances, in the shape of shadûfs, saqias, or windmills, is evident, but until a few years ago the oasis was destitute of such appliances; a number of saqias have recently been fixed in the village of Mushîa and have met with success, but it is not an easy matter to persuade the inhabitants to have recourse to lifting appliances of any description.

Some of the Dakhla wells are of considerable depth; Bir-el-Dinaria, the most northerly in the oasis, is 144 metres deep and its water emerges with a temperature of 39·5° C. The best wells yield 9 or 10 qirats, though before the modern boring operations the output of some was as much as 16. The terms ‘artesian’ and ‘thermal’ may fairly be applied to the Dakhla wells, and it is noteworthy that the temperatures as a whole increase from south to north. The thermal character of the springs may be considered to be due to the great depths from which the water is derived, the actual temperature at the point of exit being dependent on local conditions, such as the depth of the well and the rate at which the water finds its way to the surface. It is probable that the water-bearing table has its outcrop in the rainy regions of Darfur, although some of its water may be derived by direct infiltration from the Nile in its upper reaches.

42. =Kharga oasis.=--Kharga, the easternmost of the two southern oases, is a north and south lying depression, mostly bounded by steep and lofty escarpments but open to the south and south-west. A great part of its floor, which is composed of the Nubian sandstone, is buried under sand accumulations. There are seven principal villages, besides numerous hamlets and smaller settlements, with a total population of under 8,000. Taxes are levied as in Dakhla and amount to slightly over £E. 1000. The adult palm trees in the oasis number about 60,000 and the cultivated lands have an area of some 4,500 acres, or half an acre and eight palm trees per inhabitant. The crops raised do not appear to be sufficient to support the population, as a certain amount of grain is imported from Dakhla. Dates are exported to the Nile valley, though in less quantities than from Dakhla and Baharia.

The general level of the floor of the oasis lies between 50 and 130 metres above sea level, though near Qasr Zaiyan a limited area appears to lie below sea level. Water is met with in most localities on digging to a moderate depth, but the best supplies are from deep wells; as in Dakhla the majority of the wells are of considerable antiquity, though some have been recently made with modern boring plant. With an increased water-supply cultivation could be very much extended, as there are large areas of unoccupied alluvium covered land within the oasis. The same difficulties exist in Kharga as in the other oases, though here perhaps aggravated by the encroachments and movements of blown sand, namely, the lack of control of the wells and water-supply and the apathy of the inhabitants generally.

43. =Baharia oasis=, lying 180 kilometres west of Minia, is a large natural excavation 150 metres deep and entirely surrounded by escarpments. The cultivated lands bear a very small proportion to the total oasis-area; their general level is 110-115 metres above sea level, rising to 155 metres at Ain-el-Haiss in the southern part of the depression. There are four chief villages with a population, inclusive of outlying settlements, of just over 6,000. The standard of public health in this oasis is low, mainly owing to febrile disorders. The total area of cultivated land is about 2,500 acres (barely ¹⁄₂ an acre per inhabitant), largely made up of palmgroves; rice, wheat and barley are grown, but the area sown with cereals has of late years being decreasing in extent owing to a diminished output from the springs. Baharia is _par excellence_ the date-producing oasis of Egypt and very large quantities are annually exported to the Nile valley; besides date-palms the gardens contain numbers of olive, apricot and other fruit trees. Taxation is on palm trees and land.

The water-supply is derived from the Cretaceous sandstones forming the floor of the depression, the water rising naturally to the surface of the lowest areas. In numerous cases long adits have been driven into the rock to obtain an increased supply; these tunnels communicate with the surface of the ground by a series of air shafts; they mostly date from early times. No deep wells appear to exist in the oasis and certainly no borings have been made in modern times. The fall of the water-level is probably due to the gradual choking of the passages; an unsatisfactory and laborious method of cleaning out wells is in vogue but little trouble is taken to prevent the deterioration of the water-supply generally. Practically all the available land in this oasis is under cultivation, although with the reduced output of the springs the supply is barely sufficient for efficient irrigation.

44. =Farafra oasis= occupies a large semicircular depression 300 kilometres west of Assiut. The floor is formed of the white chalk at the top of the Cretaceous, but at Ain-el-Wadi, a spring in the north part of the depression at 26 metres above sea level, the underlying beds are locally exposed. The solitary village of Qasr Farafra is situated on the western side at 76 metres above sea level, and contained 542 inhabitants at the last census. In the entire area there are some 20 springs, mostly grouped round the village, each irrigating a small patch of cultivated ground; the total area of the latter, including the few palmgroves, probably does not amount to 500 acres. Wheat, barley, durra, rice, onions and some fruit are grown, and small quantities of dates and olives are exported; formerly the olives of Farafra were celebrated for their quality, but of late years the trees have deteriorated.

The water rises as springs from the white chalk and does not necessitate the use of lifting appliances, though the output appears to be decreasing through natural causes. There are a few examples of horizontal conducting channels of ancient date and two or three of the springs appear to have deep vertical shafts as in the ancient wells of Dakhla. Sweet and brackish water-holes occur in several outlying localities within the depression, as well as in the neighbouring little known oasis of Iddaila to the west. Owing to the absence of waste pools and marshy land the climate of Farafra is more healthy than that of the other oases.

45. =The Geology of Egypt=[8]. The north-east corner of Africa, lying between the Red Sea on the east and the sand merged portion of the Libyan Desert on the west, and stretching from the Mediterranean to the 22nd parallel of north latitude, both in its topographical and geological characters is distinctly tripartite, as follows:--

(1) A rugged broken undulating sandstone desert, forming the southern part of the country;

(2) Elevated plateaux, for the most part of limestone, stretching from lat. 25° N. (approximately) to the Mediterranean;

(3) The mountainous igneous range of the Red Sea Hills, with peaks over 1800 metres (6000 feet) in height.

[8] In writing this note at the request of Sir William Willcocks I have made free use of all sources, of information, but am chiefly indebted to the publications of Schweinfurth and the late Professor Zittel, Capt. Lyons, and my past and present colleagues on the Geological Survey of Egypt.

As a whole one of the most waterless and desolate areas in the world, the country is traversed from south to north by a narrow highly cultivated and thickly populated strip of alluvial land, formed and watered by the Nile. In the southern sandstone country the river occupies only a shallow valley, but to the north flows over the floor of a deep gorge cut down from the surrounding limestone plateaux. On either side of the river are alluvial plains of varying extent, composed of the finest loam, a fertile soil for the most part formed by the disintegration of the volcanic rocks of the Abyssinian highlands, annually denuded by rains and brought down by the Atbara and Blue Nile floods and deposited in the lower courses of the river. Unlike most countries therefore, the soil of Egypt has no connection with the underlying rocks, being entirely of extraneous origin and owing its existence absolutely to the peculiar conditions of rainfall in Abyssinia and the direction of drainage from the watersheds of that country.

46. =Igneous rocks.= The most ancient rocks in Egypt are found in the central igneous ranges of the Red Sea Hills and in the crystalline floor underlying the sandstones in the southern part of the country.

In Nubia the crystalline rocks consist largely of granite and gneiss, with associated diorites and schists, traversed by basaltic and felsitic dykes. Cataracts have been formed at those points where the river crosses the hard igneous belts, which may be regarded as the summits of the higher ridges of an old eroded continental land surface.

In the Red Sea Hills the most ancient rocks are the gneisses, schists, and slates, constituting the metamorphic series of Jebel Meeteq. Next in succession is a volcanic group, consisting of dolerite and sheared diabases in the south and of dolerites, andesites, tuffs and agglomerates in the north. These volcanic rocks are underlaid and intruded by still younger quartz-diorites and grey granites, and like them are pierced by masses of red granite and dykes of quartz felsite and dolerite. The red granite is itself traversed by dykes of diabase, which are thus the youngest of all, except for the still more recent andesitic intrusions into the Eocene limestones (occasional occurrences of which are met with on the plateaux on both sides of the Nile valley), and the basaltic sheets which commonly mark the base of the Oligocene sandstones in the north of the country.

The whole of the Red Sea Hills igneous complex has been planed down by marine erosion, the oldest sedimentary deposits being laid on to the smoothed denuded surfaces.

47. =Sedimentary rocks.= Geologically the sedimentary deposits of Egypt are not of great age. Broadly they consist of a great development of Upper Cretaceous and Eocene strata, followed by more restricted deposits of Oligocene and Miocene age, the still younger formations being represented only by comparatively local though important, accumulations. As a general rule the different members of the Cretaceous and Tertiary succeed each other in regular order from south to north, the strata being undisturbed and dipping northwards at a very low angle.

48. =Upper Cretaceous.= The Cretaceous system in Egypt is divisible into three main groups, (1) a great thickness of freshwater arenaceous sediments known as the Nubian Sandstone, of Senonian age in the south (Dakhla, Nile valley, and southern part of Eastern Desert), and Cenomanian age in the north (Baharia, Abu Roash(?), and Wadi Araba); (2) 300 metres of argillaceous deposits with bone-beds near the base, of Senonian age; (3) a deep water foraminiferal white chalk (Danian) 60 to 100 metres thick, especially developed in the region of the oases to the west of the Nile.

The Nubian Sandstone, the oldest sedimentary deposit in Egypt, occupies a very large area, especially in the south; wherever its base is exposed and has been critically examined, the sandstone is found to be laid on to the denuded surface of the underlying crystalline rocks. Thinner argillaceous bands are almost everywhere associated with the sandstones and the latter vary much in colour, texture, and hardness. In its widest sense the term “Nubian Sandstone” includes deposits of much greater age than Upper Cretaceous, undoubted Carboniferous fossils having been detected in some localities. The formation must be regarded as representing the slow accumulation of sediment in immense inland lakes during a great lapse of time. Although temporary marine invasions left their mark at intervals, it was not until the Cenomanian that continued depression caused a steady recession of the shore line from north to south, so that in Senonian times practically the whole of the country was occupied by the Cretaceous sea.

North of Silsila in the Nile valley the sandstones gradually give way to a series of flaggy ripple-marked sandstones alternating with sandy shales and clays, at the top of which are beds rich in bones and coprolites of fish, associated with hard oyster-limestones, overlain in Wadi Hammama, E.-N.-E. of Qena, by a limestone containing abundant remains of cephalopoda; these beds are of Upper Senonian (Campanian) age. East of Sabaia, in the Nile valley, they are followed by a 200 metre series of finely laminated clays, separated by bands of marly limestone, the greater part of which is of Cretaceous age and homotaxial with the _Exogyra_ clays and white chalk (of Campanian--Danian age) which in the southern oases follow on the rich bonebeds overlying the Nubian Sandstone.

Anterior to and during the deposition of these clayey beds in the south, thick accumulations of limestone were being formed in the more open sea to the north and are visible to-day in the Cretaceous area of Abu Roash near the pyramids of Giza, (and to a lesser extent in Jebel Shebrewet on the Gulf of Suez), where a great complex of limestones of Turonian and Senonian ages occurs. Finally a deep sea deposit of white chalk forms the summit of the Cretaceous throughout the Western Desert.

49. =Eocene.= Our knowledge of the junction of the Cretaceous and Eocene in several parts of the country leaves much to be desired. Where the Eocene is most fully developed its basal member consists of a group of green argillaceous deposits, known as the Esna shales, well seen at the base of the cliffs throughout the Esna-Qena reach of the valley. These beds everywhere pass conformably upwards into the Lower Eocene (Libyan) limestones above, but in the Nile Valley and the Eastern Desert the exact line of demarcation between them and the lithologically similar Cretaceous clays below is still somewhat obscure. In Kharga and Farafra they form a well-marked band between the White Chalk (and associated clays) at the top of the Cretaceous and the Libyan limestone of the Lower Eocene. The Esna shales may in fact be regarded as passage beds, and where they exist appear to bridge over the lapse of time which is represented by a decided unconformity between the Cretaceous and Eocene in the north of the country, as in Baharia Oasis and at Abu Roash.

The thick mass of limestone which forms the plateaux and cliffs on both sides of the valley from lat. 25° N. to Cairo is of Lower Eocene (Libyan stage) and Middle Eocene (Mokattam stage) age. These limestones, frequently nummulitic and typically marine calcareous accumulations, exceed 500 metres in thickness, and over a wide area are unrelieved by a single band of clay or sandstone. Towards the summit of the Middle Eocene, however, terrigenous deposits were laid down, the Upper Mokattam consisting of an alternating series of impure limestones, clays, and sandstones. In the Fayûm the Middle Eocene is followed by a great thickness of fluvio-marine deposits of Upper Eocene age, in which the remains of the animals that inhabited the land to the south and the adjoining seas at the time are abundantly preserved.

50. =Oligocene and Miocene.= Throughout Oligocene and Miocene times conditions similar to those which led to the deposition of the Upper Eocene formation in the Fayûm prevailed, accompanied by a continual retreat of the sea to the north. In the littoral area marine beds were intermingled with the sediments brought down by rivers from the land to the south; and throughout these deposits the remains of land animals and great quantities of large silicified trees are common. A considerable part of the deserts east and west of the valley north of lat. 29° 30´ is covered with deposits of this age, and shallow water Miocene beds, unconformably overlying the Eocene, form marked flanking plateaux to some of the igneous ranges of the Red Sea Hills.

51. =Pliocene, Pleistocene and Recent.= In Pliocene times the relative areas of land and sea approximated to those of to-day and powerful earth-movements initiated the formation of the lower part of the Nile Valley. The determining faults and the huge blocks of displaced rock are visible along the cliff walls in many parts of the valley, and at Gebelain isolated ridges of highly tilted limestone protrude above the floor of the trough, though as a rule, except near the cliffs, the faulted rocks are invisible, being buried under great thicknesses of lacustrine and fluviatile deposits. A few kilometres south of Jebel Silsila, however, Eocene and Cretaceous limestones are met with at river level in the centre of the valley and point to the Kom Ombo plain being let down by a fault of over 400 metres throw.

The Nile Valley trough or “grab” became a marine fiord in later Pliocene times, sea-beaches being formed up to 70 metres above present sea level. Extensive terraces of gravel, perched up on the surrounding slopes of the Fayûm, prove that the sea, or a great inland lake, stood at 180 metres in latest Pliocene or early Pleistocene times. From this time also dates the Red Sea (in its modern aspect), the highest Older Pleistocene coral reefs being now found at some 200 metres above sea-level; younger reefs associated with later Pleistocene gravels occur at a lower level. In later Pleistocene and early pre-human times, under the very moist climate which preceded the present desert conditions, the Nile Valley north of latitude 24° was occupied by a series of deep freshwater lakes, perhaps co-existent with that in which the Fayûm gravel terraces were accumulated. The denudation of the surrounding country was rapid, and tributary streams from the plateaux on either side brought down fine limestone detritus, which was deposited along the margins of the lakes in the form of compact beds of re-made limestone, interbedded with frequent layers of conglomerate and gravel, washed down by the larger streams and by torrential floods. In the quieter parts of these lakes clays and calcareous tufas were laid down and are visible to-day from Kom Ombo to Heluan. Subsequently, owing to the breaking down of the dividing barriers, or as the result of a general slight elevation, drainage became more pronounced and the river cut its way down through these lacustrine deposits. It was probably at this time that, following the partial removal of the gravel ridge between the Fayûm and the valley, part of the drainage obtained access to the Fayûm depression and a lake, the precursor of the historical Mœris, was formed. Subsequently, under climatic conditions similar to those of to-day, the accumulation of Nile alluvium commenced within the wide trough cut out in the older lake beds. Flood plains were formed on either side of the river, and by successive deposits, at the rate of about twelve centimetres a century, were built up to their present level.

52. =Economic products.= Limestones for building and other purposes are abundant in the Lower and Middle Eocene formations, though as a rule of only medium quality. The chief quarries are those of Jebel Mokattam, Tura, Heluan, Abu Foda, Harîdi, and el-Tarif. At Isawia, near Tahta, a fine tough freshwater tufaceous limestone of Pleistocene age occurs, and was largely used in the construction of the Assiut barrage. Clays of good quality are not widely extended, though certain bands of the Esna shales are very largely used near Qena in the manufacture of pottery. For bricks the Nile alluvium is used throughout the country.

Sandstone is quarried for local purposes at J. Ahmar near Cairo and in several localities in the south part of the country; it was formerly extensively quarried at J. Ahmar for the temples of the Delta, at J. Silsila for those of Upper Egypt, and at Girtassa, south of Assuân, for the Nubian monuments. Although a fairly hard and good weather-resisting stone when carefully selected, the frequent presence of soft uncemented and clayey laminae gives it an unreliable character, and a good deal of the decay of many of the ancient Egyptian monuments is attributable to this cause.

Numerous rocks in the Red Sea Hills and the Nile Valley were worked in Egyptian and Roman times for ornamental purposes; among them may be specially mentioned the purple imperial porphyry of J. Dokhan, the green breccia of Wadis Hammamat and Dib, the dolerite of Wadi Esh, and the hornblende granite of the first cataract. In modern times local granite was used throughout the Assuân dam and an Oligocene basalt is quarried at Abu Zabel and used for road-metal in the capital and other towns.

Old workings and mining camps are of common occurrence in many parts of the Eastern Desert and there is no doubt that considerable quantities of gold were extracted by convict labour. The quartz lodes traverse not only the metamorphic rocks but also some of the granites. Iron (hematite, limonite), copper (chrysocolla, copper pyrites) and lead (galena) bearing veins also occur, and turquoise, jasper and chrysolite are found in certain localities. Petroleum and sulphur occur sparsely near J. Zeit, and gypsum in large quantities in many parts of the country.

Phosphate deposits in the form of accumulations of bones, teeth and coprolites of fish in compact beds, have a wide distribution in the Eastern Desert, the Nile Valley and the southern oases, though these beds have not yet received the attention their importance deserves. Better known are the nitrate bearing clays which are so highly valued and largely used by the fellahin throughout the country. The chief horizons are the Esna shales and the underlying cretaceous clays, but disintegrated clays of every age are worked throughout the country, though their nitrate content may be very low and their salt content high; more prized still is the material from the middens marking the sites of ancient towns.

Natron (carbonate of soda) and salt are associated in considerable quantities in Wadi Natrun, and the latter is widely distributed in limited quantities throughout the country, the main supply being however obtained by evaporation from the shore lagoons along the coast of the delta. Rock salt of fine quality occurs in many localities, notably in the Eocene limestones three to four days east of Assiut.

APPENDICES

TABLES PAGES

A. I. Areas of the catchment basins of the Nile 119

B. II. Slopes of the Nile in its different reaches 120

C. III and IV. Velocities of the Nile in its different reaches 121

D. V to X. Distances of places on the Nile from each other 123

E. XI and XII. Details of observed discharges 129

F. XIII to XXIII. Observed discharges referred to gauges 131

G. XXIV. Mean discharges of the Nile tributaries in 1902, 1903 and 1904 139

H. XXV. Maximum and minimum discharges in 1902 and 1903 141

I. XXVI. Monthly discharges at Khartoum, Assuân and Cairo 142

J. XXVII to XL. Discharge tables for the different gauges on the Nile 143

K. XLI to LII. Detailed information about the Nile, Assuân to Cairo 153

L. LIII to LXIX. Gauges of the Nile and its tributaries 167

M. LXX and LXXI. Assuân and Cairo gauges, metres corresponding to pics 209

N. LXXII and LXXIII. Table converting cubic metres per day to cubic metres per second and vice versa 211

P. LXXIV. Bombay rainfall referred to the Assuân gauge 213

Q. LXXV to LXXXI. Meteorological data in the Nile Valley 214

N.B.--In Appendix L, the gauges are recorded in two different methods. If the fall or rise of water surface is gradual throughout the year, the gauges are recorded in five daily intervals. If, on the other hand, the rise and fall is gradual for the first four and last three months of the year, but the changes are abrupt in the remaining five months, the gauges are recorded in five daily intervals for seven months and daily for five months.

Appendix A.

TABLE I.--_Areas of Catchment Basins of the Nile._

=========================================+=========================== River. | AREA IN SQUARE KILOMETRES +-------+---------+--------- | Area. | Total. | Grand | | | Total. -----------------------------------------+-------+---------+--------- Victoria Nile at Ripon Falls |244,000| 244,000| ... Additional area drained into Lake Albert |135,000| ... | ... Albert Nile at outlet of Lake Albert | ... | 379,000| ... Albert Nile from Albert Lake to Gondokoro| 94,000| ... | ... Albert Nile at Gondokoro | ... | 473,000| ... Albert Nile, Gondokoro to above Sobat | | | mouth |202,000| ... | ... Gazelle River |240,000| ... | ... Arab River |231,000| ... | ... +-------+ | |673,000| | | | | Albert Nile above Sobat River mouth | ... |1,136,000| ... Saubat River |156,000| ... | ... White Nile below Sobat River mouth | ... |1,292,000| ... White Nile, Sobat River to Khartoum |393,000| ... | ... White Nile at Khartoum | ... |1,685,000|1,685,000 Blue Nile in Abyssinian Hills and foot | | | hills |247,000| ... | ... Blue Nile foot hills to Khartoum | 53,000| ... | ... Total Blue Nile | ... | 300,000| ... | | | Nile at Khartoum | ... | ... |1,985,000 Nile between Khartoum and Atbara | | | junction | 54,000| ... | ... Nile above Atbara junction | ... | ... |2,049,000 Atbara River in Abyssinian hills and foot| | | hills |131,000| ... | ... Atbara River foothills to mouth |106,000| ... | ... Total Atbara River | ... | 237,000| ... | | | Nile below Atbara junction | ... | ... |2,286,000 Lybian Desert from Atbara junction | | | to Sea |335,000| ... | ... Arabian Desert from Atbara junction | | | to Sea |386,000| ... | ... Total Desert Area | ... | 721,000| ... | | | Nile from its sources to its mouths | ... | ... |3,007,000 | | +--------- | | |3,007,000 =========================================+=======+=========+=========

Appendix B.

TABLE II.--_Slope of the Nile in flood from the Ripon Falls to the Sea._

===========+================+===============+========+=======+======== River. | From | To |Distance| Fall | Slope. | | | in | in | | | | kilo- |metres.| | | | mètres.| | -----------+----------------+---------------+--------+-------+-------- Victoria | | | | | Nile |Ripon Falls |Kakoji | 64 | 57 |¹⁄₁₂₀₀ „ |Kakoji |Fowera | 237 | 12 |¹⁄₂₀₀₀₀ „ |Fowera |Murchison Falls| 68 | 377 |¹⁄₁₈₀ „ |Murchison | | | | |Falls |Lake Albert | 30 | 3 |¹⁄₁₀₀₀₀ Albert Nile|Lake Albert |Dufile | 218 | 8 |¹⁄₂₅₀₀₀ „ |Dufile |Fort Berkeley | 155 | 223 |¹⁄₇₀₀ „ |Fort Berkeley |Bôr | 206 | 18 |¹⁄₁₂₀₀₀ „ |Bôr |Gaba Shamba | 196 | 10 |¹⁄₂₀₀₀₀ „ |Gaba Shamba |Lake Nô | 380 | 16 |¹⁄₂₅₀₀₀ „ |Lake Nô |Sobat | 134 | 2 |¹⁄₇₅₀₀₀ White Nile |Sobat |300 kilom. | | | | |South of | | | | |Khartum | 538 | 11 |¹⁄₅₀₀₀₀ „ |300 kilom. | | | | |South of | | | | |Khartum |Khartum | 300 | 3 |¹⁄₁₀₀₀₀₀ The Nile. |Khartum |Shabluka | 86 | 5 |¹⁄₁₇₀₀₀ | |6th Cataract | 18 | 6 |¹⁄₃₀₀₀ „ |6th Cataract |5th Cataract | 285 | 17 |¹⁄₁₇₀₀₀ | | „ | 160 | 55 |¹⁄₃₀₀₀ „ |5th Cataract |4th Cataract | 97 | 9 |¹⁄₁₁₀₀₀ | | „ | 110 | 49 |¹⁄₂₂₅₀ „ |4th Cataract |3rd Cataract | 313 | 26 |¹⁄₁₂₀₀₀ | | „ | 80 | 11 |¹⁄₇₂₅₀ „ |3rd Cataract |2nd Cataract | 110 | 17 |¹⁄₆₅₀₀ | | „ | 200 | 66 |¹⁄₃₀₀₀ „ |Wadi Haifa |1st Cataract | 345 | 28 |¹⁄₁₂₅₀₀ | | „ | 5 | 6 |¹⁄₈₀₀ „ |Assuân |Barrage | 964 | 75·4|¹⁄₁₃₀₀₀ „ |Barrage |Mediterranean | | | | |Sea | 236 | 18·6|¹⁄₁₂₅₀₀ | | +--------+-------+-------- | | | 5535 | 1129 | ¹⁄₅₀₀₀ ===========+================+===============+========+=======+========

Appendix C.

TABLE III.--_Velocity of the Nile in its different reaches._

============+===============+===============+========+==============+ Name | From | To |Distance| VELOCITY | of | | | in | IN METRES | River. | | | kilo- | PER SEC. | | | | metres.+------+-------+ | | | | in |in low | | | | |flood.|supply.| ------------+---------------+---------------+--------+------+-------+ Victoria | | | | | | Nile. |Ripon Falls |Kakoji | 64 | 1·2 | 1·2 | „ |Kakoji |Lake Choga | 47 | ·7 | ·6 | | | | | | | | Lake Choga | 80 | .. | .. | | | | | | | „ |Lake Choga |Fowera | 110 | ·7 | ·6 | „ |Fowera |Murchison Falls| 68 | 1·2 | 1·2 | „ |Murchison Falls|Lake Albert | 30 | ·9 | ·7 | | | | | | | | Lake Albert | 10 | .. | .. | | | | | | | Albert Nile.|Lake Albert |Dufile | 218 | ·7 | ·6 | „ |Dufile |Fort Berkeley | 155 | ·9 | ·7 | „ |Fort Berkeley |Bôr | 206 | 1·2 | ·9 | „ |Bôr |Gaba Shamba | 196 | ·9 | ·7 | „ |Gaba Shamba |Lake Nô | 380 | ·6 | ·6 | „ |Lake Nô |Sobat | 134 | ·35 | ·35 | White Nile.|Sobat |300 kil. South | | | | | |of Khartum. | 538 | ·6 | ·35 | „ |300 kil. South | | | | | |of Khartum. |Khartum | 300 | ·35 | ·35 | The Nile. |Khartum |Shabluka | 86 | 1·6 | ·8 | „ | 6th Cataract | 18 | 2·3 | ·8 | „ |6th Cataract--5th Cataract | 285 | 1·6 | ·8 | „ | 5th Cataract | 160 | 2·3 | 1·2 | „ |5th Cataract--4th Cataract | 97 | 1·75 | ·85 | „ | 4th Cataract | 110 | 2·3 | 1·2 | „ |4th Cataract--3rd Cataract | 313 | 1·75 | ·85 | „ | 3rd Cataract | 80 | 2·1 | 1·0 | „ |3rd Cataract--2nd Cataract | 110 | 2·1 | 1·0 | „ | 2nd Cataract | 200 | 2·3 | 1·2 | „ |Wady Haifa--1st Cataract | 345 | 1·75 | ·85 | „ | 1st Cataract | 5 | 2·3 | 1·2 | „ |Assuân--Barrage | 964 | 1·75 | ·85 | Rosetta | | | | | Branch.| Barrage--Mediterranean Sea | 236 | 1·75 | ·85 | ============+===============================+========+======+=======+

============+===============+===============+========+==============+ Name | From | To |Distance| VELOCITY | of | | | in |IN KILOMETRES | River. | | | kilo- | PER DAY. | | | | metres.+------+-------+ | | | | in |in low | | | | |flood.|supply.| ------------+---------------+---------------+--------+------+-------+ Victoria | | | | | | Nile. |Ripon Falls |Kakoji | 64 | 100 | 100 | „ |Kakoji |Lake Choga | 47 | 60 | 50 | | | | | | | | Lake Choga | 80 | .. | .. | | | | | | | „ |Lake Choga |Fowera | 110 | 60 | 50 | „ |Fowera |Murchison Falls| 68 | 100 | 100 | „ |Murchison Falls|Lake Albert | 30 | 80 | 60 | | | | | | | | Lake Albert | 10 | .. | .. | | | | | | | Albert Nile.|Lake Albert |Dufile | 218 | 60 | 50 | „ |Dufile |Fort Berkeley | 155 | 80 | 60 | „ |Fort Berkeley |Bôr | 206 | 100 | 75 | „ |Bôr |Gaba Shamba | 196 | 80 | 60 | „ |Gaba Shamba |Lake Nô | 380 | 50 | 50 | „ |Lake Nô |Sobat | 134 | 30 | 30 | White Nile.|Sobat |300 kil. South | | | | | |of Khartum. | 538 | 50 | 30 | „ |300 kil. South | | | | | |of Khartum. |Khartum | 300 | 30 | 30 | The Nile. |Khartum |Shabluka | 86 | 140 | 70 | „ | 6th Cataract | 18 | 200 | 100 | „ |6th Cataract--5th Cataract | 285 | 140 | 70 | „ | 5th Cataract | 160 | 200 | 100 | „ |5th Cataract--4th Cataract | 97 | 150 | 75 | „ | 4th Cataract | 110 | 200 | 100 | „ |4th Cataract--3rd Cataract | 313 | 150 | 75 | „ | 3rd Cataract | 80 | 180 | 90 | „ |3rd Cataract--2nd Cataract | 110 | 180 | 90 | „ | 2nd Cataract | 200 | 200 | 100 | „ |Wady Haifa--1st Cataract | 345 | 150 | 75 | „ | 1st Cataract | 5 | 200 | 100 | „ |Assuân--Barrage | 964 | 150 | 75 | Rosetta | | | | | Branch.| Barrage--Mediterranean Sea | 236 | 150 | 75 | ============+===============================+========+======+=======+

============+===============+===============+========+================ Name | From | To |Distance| TIME IN WHICH of | | | in | THE WATER River. | | | kilo- |TRAVELS IN DAYS. | | | metres.+------+--------- | | | | in | in low | | | |flood.| supply. ------------+---------------+---------------+--------+------+--------- Victoria | | | | | Nile. |Ripon Falls |Kakoji | 64 | ·7 | ·7 „ |Kakoji |Lake Choga | 47 | ·8 | ·9 | | | | | | Lake Choga | 80 | .. | .. | | | | | „ |Lake Choga |Fowera | 110 | 1·8 | 2·2 „ |Fowera |Murchison Falls| 68 | ·7 | ·7 „ |Murchison Falls|Lake Albert | 30 | ·4 | ·5 | | | | | | Lake Albert | 10 | .. | .. | | | | | Albert Nile.|Lake Albert |Dufile | 218 | 3·6 | 4·4 „ |Dufile |Fort Berkeley | 155 | 1·9 | 2·6 „ |Fort Berkeley |Bôr | 206 | 2·1 | 2·7 „ |Bôr |Gaba Shamba | 196 | 2·4 | 3·2 „ |Gaba Shamba |Lake Nô | 380 | 7·6 | 7·6 „ |Lake Nô |Sobat | 134 | 4·5 | 4·5 White Nile.|Sobat |300 kil. South | | | | |of Khartum. | 538 |10·7 | 17·9 „ |300 kil. South | | | | |of Khartum. |Khartum | 300 |10·0 | 10·0 The Nile. |Khartum |Shabluka | 86 | ·6 | 1·2 „ | 6th Cataract | 18 | ·1 | ·2 „ |6th Cataract--5th Cataract | 285 | 2·0 | 4·1 „ | 5th Cataract | 160 | ·8 | 1·6 „ |5th Cataract--4th Cataract | 97 | ·6 | 1·3 „ | 4th Cataract | 110 | ·6 | 1·1 „ |4th Cataract--3rd Cataract | 313 | 2·1 | 4·2 „ | 3rd Cataract | 80 | ·4 | ·9 „ |3rd Cataract--2nd Cataract | 110 | ·6 | 1·2 „ | 2nd Cataract | 200 | 1·0 | 2·0 „ |Wady Haifa--1st Cataract | 345 | 2·3 | 4·6 „ | 1st Cataract | 5 | 0·02 | 0·05 „ |Assuân--Barrage | 964 | 6·4 | 13·0 Rosetta | | | | Branch.| Barrage--Mediterranean Sea | 236 | 1·6 | 2·2 ============+===============================+========+======+=========

TABLE IV.--_Time water travels along the Nile._

=============+===========+==================+=========== From | To | DAYS | Distance | +------+-----------+ in | | in | in |kilometres. | |flood.|low supply.| -------------+-----------+------+-----------+----------- Lake Victoria|Lake Choga | 2 | 2 | 111 Lake Choga | .. | .. | 80 Lake Choga |Lake Albert| 3 | 3 | 209 Lake Albert | .. | .. | 9 Lake Albert |Gondokoro | 6 | 7 | 403 Gondokoro |Sobat | 16 | 18 | 885 Sobat |Khartum | 21 | 28 | 838 Khartum |Assuan | 11 | 22 | 1,804 Assuan |Cairo | 6 | 12 | 945 -------------+-----------+------+-----------+----------- Lake Albert |Cairo | 60 | 87 | 4,875 =============+===========+======+===========+===========

Appendix D.

DISTANCE FROM THE SEA TO CAIRO, CAIRO TO ASSUAN, ASSUAN TO KHARTUM, KHARTUM TO GONDOKORO AND GONDOKORO TO THE RIPON FALLS, AND BACK.

TABLES V AND VI.--_Distances in kilometres from the Barrage to the sea down the Damietta and Rosetta branches, and vice-versa, measured on the steamer track or Deep Channel in kilometres._

========================+========+======== Name of Place. |Distance|Distance | from | from |Barrage.| Sea. ------------------------+--------+-------- =Damietta Branch.= Birshams | 23 | 213 Benha | 51 | 185 Mitbera | 62 | 174 Zifta | 88 | 148 Samanûd | 124 | 112 Mansurah | 142 | 94 Sherbin | 168 | 68 Ras el Khalig (Station) | 182 | 54 Mit Abu Ghaleb | 194 | 42 Faraskur | 203 | 33 Damietta | 221 | 15 Sea | 236 | 0 ========================+========+======== Name of Place. |Distance|Distance | from | from |Barrage.| Sea. ------------------------+--------+-------- =Rosetta Branch.= Ashmun | 23 | 213 Geres | 31 | 205 Khatatbeh | 45 | 191 Gizaï | 63 | 173 Tenoub | 95 | 141 Kafr Zayat | 119 | 117 Kuddabah | 140 | 96 Shibrakhit | 154 | 82 Dessouk | 168 | 68 Fuah | 181 | 55 Atfé | 184 | 52 Rosetta | 221 | 15 Sea | 236 | 0 ========================+========+========

TABLE VII.--_Distances in kilometres from Barrage to Assuan and back in kilometres measured on the steamer track or Deep Channel.--Upper-Egypt._

===========================+========+========+=========== Name of Place. |Distance|Distance| | from | from | |Barrage.| Assuan.| ---------------------------+--------+--------+----------- Barrage | 0 | 968 | Kasr El Nil (Bridge)--Cairo| 23 | 945 | Rodah gauge | 27 | 941 | Badreshen | 46 | 922 | Aiyat | 73 | 895 | Wastah | 108 | 860 | Beni Suef | 143 | 825 | Maghagha | 199 | 769 | Minieh | 268 | 700 | Rodah | 308 | 660 | Derüt Escape | 340 | 628 | Manfalut | 377 | 591 | Asyut | 420 | 548 | Sohag | 520 | 448 | Girga | 561 | 407 | Baliyana | 579 | 389 | Dishna | 665 | 303 | Kena | 685 | 283 | Luxor | 749 | 219 | Armant | 768 | 200 | Esna | 807 | 161 | Edfou | 859 | 109 | Gebel Silsila | 898 | 70 | Kom Ombo | 925 | 43 | Assuan | 968 | 0 | ===========================+========+========+===========

TABLE VIII.--_Distances in kilometres from Assuân to Khartoum and back._

================+========+=========+=========== Name of Place. |Distance|Distance | | from | from | | Assuan.|Khartoum.| ----------------+--------+---------+----------- Assuan (Shellal)| 0 | 1804 | Kalabsha | 57 | 1747 | Dekka | 109 | 1695 | Korosko | 187 | 1617 | Der | 209 | 1595 | Ibrim | 229 | 1575 | Toski | 251 | 1553 | Abu Simbel | 283 | 1521 | Wadi Haifa | 345 | 1459 | Kaibar | 663 | 1141 | Hannek | 735 | 1069 | Dongola | 795 | 1009 | Abu Hamed | 1255 | 549 | Berber | 1460 | 344 | Atbara | 1484 | 320 | Shendy | 1621 | 183 | Shabluka | 1700 | 104 | Khartoum | 1804 | 0 | ================+========+=========+===========

TABLE IX.--_Distances in kilometres from Khartoum to Gondokoro and back._

==============+=========+==========+=========== Name of Place.|Distance | Distance | | from | from | |Khartoum.|Gondokoro.| --------------+---------+----------+----------- Khartoum | 0 | 1723 | Duem | 201 | 1522 | Abou Zeid | 336 | 1387 | Gebelain | 384 | 1339 | Kaka | 639 | 1084 | Kodok | 747 | 976 | Tewfikieh | 830 | 893 | Sobat | 838 | 885 | Mouth of Zeraf| 886 | 837 | Lake No | 972 | 751 | Hillet Nuer | 1177 | 546 | Sudd Block 15 | 1218 | 505 | Gaba Shambe | 1352 | 371 | Bor | 1548 | 175 | Lado | 1711 | 12 | Gondokoro | 1723 | 0 | ==============+=========+==========+===========

TABLE X.--_Distances in kilometres from Gondokoro to Ripon Falls and back._

===============+==========+============+=========== | Distance | Distance | Name of Place. | from | from | |Gondokoro.|Ripon Falls.| ---------------+----------+------------+----------- Gondokoro | 0 | 803 | Fort Berkeley | 31 | 772 | Dufile | 186 | 617 | Wadelai | 331 | 472 | Lake Albert | 403 | 400 | Murchison Falls| 434 | 369 | Fowera | 501 | 302 | Mruli | 611 | 192 | Lake Choga | 691 | 112 | Kakogi | 739 | 64 | Ripon Falls | 803 | 0 | ===============+==========+============+===========

TABLE XI.--_Distances from Khartoum to Rosaires and back along the Blue Nile._

==============+=========+=========+=========== | Distance| Distance| Name of Place.| from | from | |Khartoum.|Rosaires.| --------------+---------+---------+----------- Khartoum | 0 | 615 | Kamlin | 98 | 517 | Rufaa | 151 | 464 | Abu-Haraz | 188 | 427 | Rahad mouth | 190 | 425 | Wad-Medani | 198 | 417 | Dinder mouth | 265 | 350 | Sennaar | 343 | 272 | Karkoj | 462 | 153 | Rosaires | 615 | 0 | ==============+=========+=========+===========

Appendix E

TABLE XII.--_Details of observed discharges from Sir W. Garstin’s report on the Basin of the Upper Nile._

=============+===============+======+=======+======+========+========= River. | Locality. |Gauge.| Date. | Area |Velocity|Discharge | | | | of | metres | m³ | | | | Sec- | per | per | | | | tion.| second.| second. -------------+---------------+------+-------+------+--------+--------- Victoria Nile|Above Ripon | | | | | |Falls | ·51 |22·1·03|2312·0| 0·237 | 548·0 |Murchison Falls| .. |20·3·03| 894·4| 0·65 | 577·0 | | | | | | _Uganda | | | | | | Streams_: | | | | | | | | | | | | Ruizi | .. | .. | 6·2·03| 9·0| 1·22 | 11·0 Nyam Gasha | .. | .. |16·2·03| 8·9| 0·55 | 4·9 Lukoku | .. | .. |24·2·03| 5·4| 0·53 | 2·8 Mbuku | .. | .. |25·2·03| 6·1| 1·16 | 7·1 Hima | .. | .. |25·2·03| 1·1| 0·70 | 0·7 Ruimi | .. | .. |26·2·03| 5·8| 0·74 | 4·3 Mpangu | .. | .. |26·2·03| 3·0| 0·88 | 2·6 Msisi | .. | .. | 9·3·03| 6·7| 0·40 | 2·7 Ngusi | .. | .. |12·3·03| 12·5| 0·50 | 6·2 Kagera | .. | .. |26·2·03| 412·0| 0·35 | 143·0 Semliki |Outlet of | | | | | |Lake Edward | .. |18·2·03| 130·0| 0·70 | 90·0 „ |Inlet of | | | | | |Lake Albert | .. | 4·3·03| 121·0| 0·96 | 116·0 | | | | | | _Albert Nile | | | | | | tributaries_:| | | | | | | | | | | | Umi | .. | .. |22·3·03| 15·1| 1·20 | 12·3 Asua | .. | .. |28·3·03| 18·7| 0·58 | 10·8 Kit | .. | .. | ..| ..| .. | 0 Albert Nile |Wadeiai | ·52 |22·3·03| 770·9| 0·84 | 646·0 „ |Gondokoro | ·18 |28·3·01| 779·0| 0·73 | 566·0 „ | „ | ·84 | 9·9·02|1033·0| 0·93 | 960·0 „ | „ | ·50 | 1·4·03| 615·0| 1·07 | 641·0 „ | „ | 2·33 | 9·9·03|1347·0| 1·37 | 1847·0 „ | „ | ·84 |14·5·04| ..| .. | 1138·0 „ |Mongalla | | | | | „ |(north of | | | | | |Gondokoro) | .. |14·9·03|1487·0| 1·44 | 2046·0 „ |Bôr | .. |16·9·03| 770·0| 1·14 | 888·0 „ | „ | 2·03 |12·5·04| ..| .. | 813·0 „ |North of Gaba- | .. | 4·9·02| 498·0| 0·80 | 398·0 „ |Shamba | .. |18·9·03| 669·0| 0·80 | 532·0 „ |Hillet Nûr | .. | 1·9·03| 478·0| 0·78 | 375·0 „ | „ | .. |13·4·03| 392·0| 0·88 | 346·0 „ |North of | | | | | |Hillet-Nûr | .. | 1·4·01| 485·0| 0·54 | 262·0 „ | „ | .. | 2·9·02| 511·0| 0·65 | 333·0 „ |South of Lake | | | | | |Nô | .. |14·4·00| 262·0| 0·84 | 219·0 „ | „ | .. |14·4·03| 424·0| 0·71 | 285·0 „ | „ | .. |31·8·03| 441·0| 0·72 | 318·0 „ | „ | .. |22·5·04| ..| .. | 302·0 Bahr El Gazal|28 kil. from | | | | | |mouth | .. |30·8·03| 52·0| 0·23 | 12·0 „ |32 „ | .. |21·9·03| 104·0| 0·19 | 20·0 „ |33 „ | .. | 2·4·01| 149·0| 0·18 | 27·0 „ |33 „ | .. |31·8·02| 86·0| 0·17 | 15·0 „ |50 „ | .. |15·4·03| 200·0| 0·20 | 23·0 „ |51 „ | .. | 1·4·00| 161·0| 0·21 | 34·0 Bahr El Zeraf|8 „ | .. |22·9·02| 240·0| 0·40 | 97·0 „ |14 „ | .. |29·8·03| 180·0| 0·61 | 110·0 „ |19 „ | .. | 3·4·01| 138·0| 0·24 | 33·0 „ |20 „ | .. |16·4·03| 179·0| 0·30 | 50·0 „ |20 „ | .. |22·9·03| 232·0| 0·66 | 158·0 „ |96 „ | .. |25·3·00| 91·0| 0·35 | 32·0 Albert Nile |Above Sobat | | | | | |junction | .. |30·8·02| 813·0| 0·41 | 336·0 „ | „ | .. |22·9·02|1054·0| 0·40 | 419·0 „ | „ | .. |22·9·03|1034·0| 0·44 | 450·0 „ | „ | .. |16·4·03| 710·0| 0·49 | 349·0 Sobat River |25 kil. from | | | | | |mouth | 3·16 |26·9·03|1030·0| 0·87 | 895·0 „ |25 „ | 2·70 |26·8·03| ..| .. | 769·0 „ |40 „ | ·10 |17·4·03| 414·0| 0·12 | 45·0 „ |45 „ | .. | 6·4·01| 401·0| 0·22 | 87·0 White Nile |Tewfikia | .. | 6·4·01|1081·0| 0·28 | 381·0 „ | „ | ·24 |17·4·03|1068·0| 0·35 | 368·0 „ | „ | 2·65 |26·8·03|2174·0| 0·54 | 1046·0 „ | „ | 3·38 |26·9·03|2332·0| 0·56 | 1304·0 „ | „ | .. |25·9·02|1983·0| 0·66 | 1272·0 Blue Nile |Outlet of Lake | | | | | |Tsana | .. |31·1·03| 65·0| 0·64 | 41·8 =============+===============+======+=======+======+========+=========

Appendix F.

TABLE XIII.--_Observed discharges of the Victoria Nile referred to the Jinja gauge on Lake Victoria._

1903

==========+===============+================================+=========== Date of | Locality | GAUGE AT JINJA | Discharge Discharge.| where taken. |----------+----------+----------+in metres³ | | Day | 10 days | 15 days |per second. | | of | before | before | | |discharge.|discharge.|discharge.| ----------+---------------+----------+----------+----------+----------- 22 January|Ripon Falls | ·51 | .. | .. | 548 20 March |Below the | | | | |Murchison Falls| .. | ·66 | ·70 | 577 ==========+===============+==========+==========+==========+===========

TABLE XIV.--_Observed discharges of the Albert Nile at Wadelai referred to the Wadelai gauge._

1903

==========+======+===========+======== Date of |Gauge.| Discharge |Remarks. Discharge.| |in metres³ | | |per second.| ----------+------+-----------+-------- 22 March | ·52 | 646 | ==========+======+===========+========

TABLE XV.--_Observed discharges of the Albert Nile referred to the Mongalla gauge._

1903 ======+======+========+==========================================+======= Loca- |Kilo- | Date. | MONGALLA GAUGE (32 kilom. north of | Dis- lity. |metres| | Gondokoro) |charge | from | +-----+-----+-----+-----+-----+-------+----+ m³ per |Gondo-| | 5 | 4 | 3 | 2 | 1 | day | 1 |second. |koro. | |days |days | days| days| day | of | day| | | | be- | be- | be- | be- | be- | dis- | af-| | | |fore.|fore.|fore.|fore.|fore.|charge.|ter.| ------+------+--------+-----+-----+-----+-----+-----+-------+----+------- Gondo-| 0 | 1 April| ..| ..| ..| ..| ..| 0·83 |0·83| 693 koro | | | | | | | | | | [9] | | 9 Sep- | 2·73| 2·85| 2·90| 3·02| 3·16| 3·14 |3·08| 1985 | |tember | | | | | | | | [10] Mon- | 32 |14 Sep- | 3·14| 3·08| 2·90| 2·84| 2·82| 2·82 |2·82| 2046 galla | |tember | | | | | | | | Der- | 156 |16 Sep- | 2·90| 2·84| 2·82| 2·82| 2·82| 2·84 |2·92| 888 wish | |tember | | | | | | | | Dem | | | | | | | | | | North | 415 |18 Sep- | 2·82| 2·82| 2·82| 2·84| 2·92| 3·06 |3·12| 532 of | |tember | | | | | | | | Gaba- | | | | | | | | | | Shamba| | | | | | | | | | Hillet| 538 | 1 Sep- | 2·52| 2·52| ? | ? | ? | 2·52 |2·45| 375 Nur | |tember | | | | | | | | Hillet| 542 |13 April| 0·87| 0·89| 0·90| 0·90| 0·87| 0·88 |0·88| 331 Nur | | | | | | | | | | South | 741 |14 April| 0·89| 0·90| 0·90| 0·87| 0·88| 0·88 |0·89| 285 of | | | | | | | | | | Lake | | | | | | | | | | No | | | | | | | | | | South | 742 |31 Au- | 2·49| 2·52| 2·52| ? | ? | ? |2·52| 318 of | |gust | | | | | | | | Lake | | | | | | | | | | No | | | | | | | | | | 1904 Gondo-| |14 May | 1·89| 1·89| 1·96| 2·03| 2·10| 2·03 |2·07| 1138 koro | | | | | | | | | | Bôr | 165 |12 May | 1·89| 1·89| 1·89| 1·89| 1·96| 2·03 |2·10| 813 South | 742 |22 May | 2·03| 2·03| 2·03| 2·07| 2·07| 2·17 |2·17| 302 of | | | | | | | | | | Lake | | | | | | | | | | No | | | | | | | | | |

[9] 641 + 52 for side channel.

[10] 1847 + 138 for side channel.

TABLE XVI.--_Observed discharges of the Bahr El Gazelle referred to the Tewfikia gauge on the White Nile._

============+===========================+=======+=========== Date | GAUGE | Dis- | Remarks. of +------+------+------+------+charges| discharge. | Day. | 1 | 2 | 3 | m³ | | | day | days | days | per | | |after.|after.|after.|second.| ------------+------+------+------+------+-------+----------- 21 September| 3·31 | 3·33 | 3·35 | 3·36 | 20 | 30 August | 2·74 | 2·75 | 2·76 | 2·77 | 12 | ============+======+======+======+======+=======+===========

TABLE XVII.--_Observed discharges of the Bahr El Zeraf referred to the Tewfikia gauge on the White Nile._

1903 ==============+==============================+===========+========== Date | GAUGE |Discharge | Remarks. of discharge. +-----------+-------+----------+ m³ | | 1 | Day. | 1 |per second.| |day before.| |day after.| | --------------+-----------+-------+----------+-----------+---------- 16 April | 0·24 | 0·24 | 0·24 | 50 | 22 September | 3·31 | 3·33 | 3·35 | 158 | 8 May | 0·25 | 0·26 | 0·26 | 61 | 29 August | 2·68 | 2·70 | 2·72 | 110 |App. gauge 1904 23 May | 1·35 | 1·38 | 1·40 | 124 | ==============+===========+=======+==========+===========+==========

TABLE XVIII.--_Observed discharges of the Albert Nile above the Sobat junction referred to the Tewfikia gauge._

1903 =============+=================================+=========== Date | GAUGE |Discharge of discharge.+-----------+----------+----------+ m³ | 1 | day. | 1 |per second. |day before.| |day after.| -------------+-----------+----------+----------+----------- 16 April | ·24 | ·24 | ·24 | 349 22 September | 3·31 | 3·33 | 3·35 | 450 =============+===========+==========+==========+===========

TABLE XIX.--_Observed discharges of the Sobat River referred to the Dulaib Hilla gauge._

1903 =============+===========+==========+==========+=========== 17 April | .. | ·10 | .. | 45 26 August | 2·70 | 2·71 | 2·74 | 769 26 September | 3·16 | 3·17 | 3·19 | 895 =============+===========+==========+==========+===========

TABLE XX.--_Observed discharges of the White Nile just below the Sobat junction referred to the Tewfikia gauge._

1903 =============+===========+=========+==========+============ 17 April | ·24 | ·24 | ·24 | 381 26 August | 2·64 | 2·65 | 2·66 | 1046 26 September | 3·37 | 3·38 | 3·40 | 1304 =============+===========+=========+==========+============

TABLE XXI.--_Observed discharges of the White Nile at Duem referred to the Duem and Khartoum gauges._

===========+======+==================================+========= Date. | Duem | KHARTOUM GAUGES |Discharge |Gauge | | cubic | - +-------+-------+-------+----------+ metres |Gauge.|3 days |2 days | day | day of | per | |before.|before.|before.|discharge.| second. -----------+------+-------+-------+-------+----------+--------- | | | | | | 1902 | | | | | | | | | | | | May 13 | ·51 | -·06 | -·07 | -·04 | -·04 | 347 June 11 | ·95 | ·76 | ·75 | ·77 | ·84 | 650 July 8 | 1·42 | 1·70 | 1·70 | 1·85 | 2·03 | 788 August 5 | 2·20 | 3·52 | 3·62 | 3·71 | 3·79 | 867 September 2| 3·48 | 5·30 | 5·30 | 5·20 | 5·20 | 330 October 1 | 3·50 | 5·03 | 5·06 | 5·16 | 5·14 | 870 October 28 | 2·50 | 3·35 | 3·30 | 3·23 | 3·16 | 802 December 1 | 2·00 | 2·11 | 2·10 | 2·08 | 2·06 | 930 December 29| 2·04 | 1·54 | 1·50 | 1·48 | 1·45 | 1518 | | | | | | 1903 | | | | | | | | | | | | January 27 | 1·12 | 0·90 | 0·87 | 0·84 | 0·83 | 663 February 24| 0·86 | 0·36 | 0·32 | 0·29 | 0·28 | 462 March 24 | 0·46 | 0·02 | 0·01 | 0·01 | 0·02 | 559 April 21 | 0·38 | -0·14 | -0·12 | -0·12 | -0·16 | 415 May 19 | 0·38 | -0·26 | -0·23 | -0·21 | -0·19 | 447 June 16 | 1·09 | 1·41 | 1·56 | 1·65 | 1·75 | 658 July 1 | 1·31 | 1·61 | 1·54 | 1·54 | 1·54 | 884 „ 14 | 1·71 | 2·55 | 2·58 | 2·75 | 2·80 | 835 August 4 | 2·46 | 3·50 | 3·80 | 4·05 | 4·40 | 768 „ 11 | 3·28 | 4·95 | 5·06 | 5·06 | 5·10 | 579 „ 18 | 3·70 | 5·55 | 5·70 | 5·80 | 5·70 | 534 „ 23 | 4·08 | 5·80 | 5·90 | 5·95 | 6·00 | 654 „ 28 | 4·18 | 6·03 | 6·08 | 6·00 | 6·05 | 710 September 2| 4·33 | 6·15 | 6·28 | 6·24 | 6·30 | 571 „ 7 | 4·43 | 6·20 | 6·20 | 6·15 | 6·12 | 737 „ 12 | 4·46 | 6·24 | 6·14 | 6·15 | 6·05 | 653 „ 18 | 4·40 | 5·86 | 5·95 | 5·88 | 5·88 | 840 „ 24 | 4·28 | 5·95 | 6·00 | 6·10 | 6·10 | 763 October 7 | 3·93 | 5·57 | 5·40 | 5·32 | 5·10 | 1588 November 3 | 3·11 | 3·90 | 3·85 | 3·75 | 3·65 | 1563 „ 24 | 2·44 | 2·65 | 2·63 | 2·63 | 2·60 | 1665 December 8 | 2·06 | 2·30 | 2·28 | 2·20 | 2·15 | 1462 „ 22 | 1·80 | 1·90 | 1·90 | 1·88 | 1·88 | 1403 | | | | | | 1904 | | | | | | | | | | | | January 6 | 1·66 | 1·78 | 1·78 | 1·78 | 1·75 | 1508 „ 20 | 1·54 | 1·48 | 1·48 | 1·48 | 1·55 | 1466 ===========+======+=======+=======+=======+==========+=========

TABLE XXII.--_Observed discharges of the Blue Nile at Khartoum referred to the Wad-Medani and Khartoum gauges._

1902 ============+==========================+=======+=========+========= Date | WAD MEDANI GAUGES | Dis- | | of +-------+-------+----------+charge | | Discharge. | 2 | 1 | Date |m³ per | Khartoum| Remarks. | days | day | of |second.| gauges.| |before.|before.|discharge.| | | ------------+-------+-------+----------+-------+---------+--------- 9 May | ·39 | ·39 | ·37 | 184 | -0·05 | 23 „ | ·71 | ·61 | ·65 | 194 | 0·16 | 6 June | 2·07 | 2·03 | 1·97 | 604 | 0·76 | 20 „ | 2·97 | 3·27 | 3·39 | 695 | 1·06 | 27 „ | 3·04 | 3·89 | 4·29 | 837 | 1·30 | 4 July | 3·80 | 3·70 | 3·80 | 1032 | 1·75 | 11 „ | 4·56 | 4·38 | 4·48 | 1453 | 2·07 | 18 „ | 4·80 | 5·10 | 5·20 | 1612 | 2·33 | 25 „ | 5·70 | 5·66 | 5·76 | 1885 | 2·64 | 1 August | 7·06 | 7·28 | 7·56 | 3420 | 3·34 | 8 „ | 8·56 | 8·76 | 8·86 | 4880 | 4·20 | 15 „ | 9·14 | 9·02 | 8·96 | 4720 | 4·50 | 22 „ | 10·08 | 10·00 | 9·66 | 5540 | 4·93 | 29 „ | 10·46 | 10·52 | 10·32 | 7180 | 5·34 | 5 September| 10·42 | 10·32 | 10·30 | 6580 | 5·27 | 12 „ | 10·40 | 10·28 | 10·60 | 5800 | 5·35 | 19 „ | 10·32 | 10·00 | 10·30 | 5760 | 5·30 | 26 „ | 10·00 | 10·10 | 9·90 | 4800 | 5·10 | 3 October | 9·94 | 9·88 | 9·70 | 4880 | 5·03 | 10 „ | 8·40 | 8·20 | 8·00 | 3250 | 3·45 | 17 „ | 7·38 | 7·48 | 7·40 | 2460 | 3·73 | 24 „ | 6·94 | 6·88 | 6·78 | 2030 | 3·40 | 31 „ | 6·18 | 6·14 | 6·04 | 1244 | 3·00 | 7 November | 5·66 | 5·60 | 5·50 | 1272 | 2·77 | 14 „ | 5·10 | 5·06 | 5·00 | 1035 | 2·48 | 21 „ | 4·74 | 4·74 | 4·70 | 802 | 2·23 | 28 „ | 4·56 | 4·54 | 4·46 | 787 | 2·11 | 5 December | 4·08 | 4·04 | 4·00 | 654 | 1·94 | 12 „ | 3·73 | 3·74 | 3·66 | 486 | 1·80 | 23 „ | 3·43 | 3·32 | 3·26 | 476 | 1·58 | 1903 2 January | 2·90 | 2·88 | 2·84 | 348 | 1·39 | 9 „ | 2·64 | 2·60 | 2·58 | 270 | 1·22 | 16 „ | 2·48 | 2·46 | 2·44 | 248 | 1·09 | 23 „ | 2·34 | 2·32 | 2·30 | 250 | 0·94 | 6 February | 2·06 | 2·04 | 2·04 | 226 | 0·60 | 20 „ | 1·86 | 1·84 | 1·84 | 152 | 0·39 | 6 March | 1·60 | 1·60 | 1·58 | 202 | 0·18 | 20 „ | 1·36 | 1·34 | 1·34 | 201 | 0·04 | 3 April | 1·24 | 1·20 | 1·20 | 132 |[=0]·12 | 17 „ | 1·08 | 1·04 | 1·04 | 154 |[=0]·16 | 1 May | 0·98 | 0·98 | 0·96 | 121 |[=0]·16 | 8 „ | 0·88 | 0·88 | 0·90 | Nil |[=0]·23 | 15 „ | 0·88 | 0·92 | 0·98 | „ |[=0]·26 | 22 „ | 1·40 | 1·66 | 1·70 | „ |[=0]·09 | 28 „ | 2·74 | 1·51 | 3·43 | 374 | 0·53 | 6 June | 4·05 | 3·61 | 3·65 | 970 | 1·40 | 19 „ | 4·70 | 4·62 | 4·52 | 1500 | 1·90 | 26 „ | 4·25 | 4·51 | 4·31 | 1089 | 1·58 | 3 July | 4·71 | 5·27 | 5·61 | 1314 | 1·78 | 10 „ | 6·45 | 6·55 | 6·67 | 1952 | 2·48 | 17 „ | 6·74 | 6·57 | 6·91 | 2267 | 2·75 | 24 „ | 7·97 | 7·81 | 7·87 | 3183 | 3·40 | 31 „ | 7·77 | 7·67 | 7·70 | 2870 | 3·45 | 5 August | 9·81 | 10·11 | 10·11 | 7584 | 4·60 | 10 „ | 10·15 | 9·99 | 9·89 | 7100 | 5·06 | 14 „ | 10·59 | 10·71 | 10·57 | 9340 | 5·65 | 21 „ | 10·49 | 10·73 | 10·71 | 9519 | 5·90 | 28 „ | 10·47 | 10·41 | 10·61 | 9544 | ? | 4 September| 10·68 | 10·44 | 10·40 | 8474 | 6·20 | 11 „ | 10·74 | 10·52 | 10·46 | 8385 | 6·15 | 18 „ | 9·94 | 9·92 | 9·96 | 7070 | 5·88 | 25 „ | 10·52 | 10·46 | 10·32 | 8965 | 6·08 | 2 October | 9·22 | 9·48 | 9·36 | 6581 | 5·53 | 9 „ | 9·14 | 9·04 | 8·64 | 5749 | 5·15 | 16 „ | 7·97 | 7·94 | 8·07 | 3812 | 4·45 | 23 „ | 8·90 | 8·64 | 8·54 | 4198 | 4·56 | 30 „ | 7·53 | 7·33 | 7·29 | 2893 | 4·00 | 6 November | 6·86 | 6·68 | 6·32 | 2275 | 3·50 | 13 „ | 6·00 | 5·90 | 5·70 | 1790 | 3·10 | 20 „ | 5·71 | 5·65 | 5·55 | 1456 | 2·65 | 4 December | 4·90 | 4·88 | 4·84 | 1102 | 2·35 | 18 „ | 4·36 | 4·30 | 4·28 | 789 | 1·90 | 25 „ | 3·90 | 3·88 | 3·84 | 722 | 1·88 | 1904 1 January | 3·60 | 3·66 | 3·64 | 604 | 1·80 | 15 „ | 3·40 | 3·38 | 3·36 | 488 | 1·59 | ============+=======+=======+==========+=======+=========+=========

TABLE XXIII.--_Observed discharges of the Atbara referred to the Khasm El Girba gauge._

1903 ============+=====================================+=======+======= Date of | GAUGES | Dis- |REMARKS Discharge. +-----+-----+-----+-----+-----+-------+charge | | 5 | 4 | 3 | 2 | 1 | Date | m³ | |days |days |days | days| day | of | per | | be- | be- | be- | be-| be- | dis- |second.| |fore.|fore.|fore.|fore.|fore.|charge.| | ------------+-----+-----+-----+-----+-----+-------+-------+------- 16 July | 2·65| 2·31| 2·10| 2·10| 2·65| 2·28 | 381 | 23 „ | 2·37| 2·55| 2·74| 2·83| 2·70| 2·70 | 538 | 27 „ | 2·70| 2·70| 3·00| 2·62| 2·53| 2·60 | 780 | 2 August | 2·76| 2·80| 3·29| 3·54| 4·21| 4·00 | 758 | 5 „ | 3·54| 4·21| 4·00| 3·56| 3·25| 3·35 | 1448 | 14 „ | 3·29| 3·72| 4·61| 4·37| 4·53| 4·60 | 2318 | 15 „ | 3·72| 4·61| 4·37| 4·53| 4·60| 4·85 | 2931 | 27 „ | 5·12| 4·82| 4·54| 4·35| 4·20| 4·80 | 2632 | 30 „ | 4·35| 4·20| 4·80| 4·55| 4·55| 4·75 | 3088 | 5 September| 4·45| 4·52| 4·52| 4·60| 4·70| 4·55 | 2822 | 12 „ | 4·58| 4·50| 4·15| 4·30| 3·89| 3·95 | 2091 | 18 „ | 3·80| 3·84| 3·71| 3·88| 4·36| 4·20 | 1672 | 25 „ | 4·12| 3·80| 4·45| 3·30| 3·25| 3·10 | 1267 | 28 „ | 3·30| 3·25| 3·10| 2·89| 3·42| 3·10 | 902 | 2 October | 3·42| 3·10| 3·13| 3·05| 2·88| 2·78 | 925 | 4 „ | 3·13| 3·05| 2·88| 2·78| 2·78| 2·90 | 754 | 5 „ | 3·05| 2·88| 2·78| 2·78| 2·90| 2·75 | 703 | ============+=====+=====+=====+=====+=====+=======+=======+=======

Appendix G.

TABLES GIVING MEAN MONTHLY DISCHARGES OF THE NILE AND ITS TRIBUTARIES DURING 1902, 1903 AND 1904.

TABLE XXIV.--_Mean discharges of the Nile tributaries in cubic metres per second at the various gauge stations in 1902, 1903, 1904._

1902 =========+=======+====================+=====+======+=====+========+ Month. | Victo-| ALBERT NILE | Ga- |Sobat |White| White | | ria +-----+------+-------+zelle|river.| Nile| Nile | |Nile at|Wade-|Gondo-| Above |river| | at | at | | Ripon |lai. | koro.| Sobat | app.| | Tew-| Khar- | | Falls.| | | junc- | | | fi- | toum. | | | | | tion. | | | kia.| | | | | | | | | | | ---------+-------+-----+------+-------+-----+------+-----+--------+ January | 510 | 620| 660 | .. | .. | .. | ..| 950 | February | 510 | 580| 640 | .. | .. | .. | ..| 550 | March | 500 | 570| 660 | .. | .. | .. | ..| 420 | April | 530 | 540| 550 | .. | .. | .. | ..| 370 | May | 560 | 560| 630 | .. | .. | .. | ..| 350 | June | 550 | 550| 550 | .. | .. | .. | ..| 600 | ---------+-------+-----+------+-------+-----+------+-----+--------+ July | 530 | 560| 600 | .. | .. | .. | ..| 900 | August | 520 | 580| 1000 |340 | .. | 570 | 910| 600[11]| September| 510 | 610| 820 |420 | .. | 810 | 1230| 600[11]| October | 490 | 640| 780 | .. | .. | .. | ..| 900 | November | 500 | 710| 900 | .. | .. | .. | ..| 850 | December | 490 | 740| 860 | .. | .. | .. | ..|1202 | +-------+-----+------+-------+-----+------+-----+--------+ Year | 520 | 600| 720 | .. | .. | .. | ..| 690 | ---------+-------+-----+------+-------+-----+------+-----+--------+ 1903 =========+=======+=====+======+=======+=====+======+=====+========+ January | 530 | 710| 760 |400 | 0 | 600 | 1000|1000 | February | 610 | 680| 740 |370 | 0 | 230 | 600| 600 | March | 630 | 660| 700 |350 | 0 | 130 | 480| 500 | April | 650 | 640| 700 |360 | 0 | 40 | 400| 420 | May | 740 | 670| 900 |390 | 0 | 100 | 490| 420 | June | 800 | 710| 1020 |400 | 0 | 320 | 720| 600 | +-------+-----+------+-------+-----+------+-----+--------+ July | 840 | 760| 1100 |410 | 10 | 410 | 820| 700[11]| August | 790 | 820| 1600 |420 | 10 | 680 | 1100| 400[11]| September| 730 | 870| 2100 |430 | 20 | 870 | 1300| 600[11]| October | 770 | 970| 1900 |360 | 30 | 1040 | 1400|1700 | November | 810 | 1040| 1700 |350 | 30 | 1080 | 1430|1600 | December | 810 | 1060| 1200 |380 | 30 | 1080 | 1460|1450 | +-------+-----+------+-------+-----+------+-----+--------+ Year | 730 | 800| 1200 |390 | 10 | 550 | 940| 830 | ---------+-------+-----+------+-------+-----+------+-----+--------+ 1904 =========+=======+=====+======+=======+=====+======+=====+========+ January | .. | 1060| 1100 |460 | 30 | 770 | 1230|1200 | February | .. | 1030| 1060 |430 | 20 | 230 | 660| 800 | March | .. | 1000| 1020 |430 | 20 | 130 | 560| 520 | April | .. | 1000| 1060 |430 | 10 | 100 | 530| 500 | May | .. | ..| 1200 |430 | 0 | 160 | 590| 500 | June | .. | ..| 1200 |400[11]| 0 | 290 | 690| 550 | +-------+-----+------+-------+-----+------+-----+--------+ July | .. | ..| .. | .. | .. | .. | ..| .. | August | .. | ..| .. | .. | .. | .. | ..| .. | September| .. | ..| .. | .. | .. | .. | ..| .. | October | .. | ..| .. | .. | .. | .. | ..| .. | November | .. | ..| .. | .. | .. | .. | ..| .. | December | .. | ..| .. | .. | .. | .. | ..| .. | +-------+-----+------+-------+-----+------+-----+--------+ Year | .. | ..| .. | .. | .. | .. | ..| .. | =========+=======+=====+======+=======+=====+======+=====+========+

1902 =========+=====+======+=======+============+=======+======== Month. | Blue|Atbara| Total | Nile at: |Rosetta|Damietta | Nile|river.| for: | Halfa = |branch.| branch. | at | | White,|1^{st} Jan.-| | |Khar-| | Blue |1^{st} July.| | |toum.| | and | Assuân = | | | | | Atbara|1^{st} July-| | | | |rivers.|1^{st} Jan. | | ---------+-----+------+-------+------------+-------+-------- January | 280| 0 | 1230 | 1100 | 1000 | 20 February | 240| 0 | 790 | 720 | 290 | 40 March | 190| 0 | 610 | 600 | 40 | 40 April | 190| 0 | 560 | 530 | 0 | 0 May | 180| 0 | 530 | 510 | 0 | 0 June | 600| 50 | 1250 | 550 | 0 | 0 ---------+-----+------+-------+------------+-------+-------- July | 1500| 500 | 2900 | 1100 | 0 | 0 August | 5000| 1200 | 6300 | 3600 | 800 | 400 September| 6200| 1200 | 8000 | 6600 | 2600 | 400 October | 2800| 80 | 3780 | 4950 | 2500 | 1300 November | 1000| 0 | 1850 | 2400 | 1400 | 700 December | 500| 0 | 1700 | 1700 | 1600 | 140 +-----+------+-------+------------+-------+-------- Year | 1560| 250 | 2500 | 2030 | 850 | 340 ---------+-----+------+-------+------------+-------+-------- 1903 =========+=====+======+=======+============+=======+======== January | 300| 0 | 1300 | 1300 | 1300 | 20 February | 240| 0 | 840 | 880 | 500 | 20 March | 180| 0 | 680 | 620 | 100 | 30 April | 120| 0 | 540 | 480 | 0 | 0 May | 280| 0 | 700 | 440 | 0 | 0 June | 1200| 200 | 2000 | 630 | 0 | 0 +-----+------+-------+------------+-------+-------- July | 2500| 600 | 3800 | 1400 | 0 | 150 August | 8200| 2300 | 10900 | 5700 | 1500 | 300 September| 8200| 1500 | 10300 | 8600 | 3300 | 2000 October | 4500| 0 | 6200 | 6300 | 3500 | 2200 November | 1700| 0 | 3200 | 3400 | 2500 | 1600 December | 800| 0 | 2253 | 2000 | 1100 | 800 +-----+------+-------+------------+-------+-------- Year | 2350| 380 | 3560 | 2650 | 1150 | 590 ---------+-----+------+-------+------------+-------+-------- 1904 =========+=====+======+=======+============+=======+======== January | 500| 0 | 1700 | 1400 | 1000 | 580 February | 300| 0 | 1100 | 1300 | 850 | 110 March | 210| 0 | 730 | 850 | 110 | 250 April | 200| 0 | 700 | 650 | 0 | 80 May | 300| 0 | 800 | 600 | 0 | 10 June | 500| 50 | 1050 | 950 | 0 | 30 +-----+------+-------+------------+-------+-------- July | 2600| 800 | .. | 1100 | 30 | 80 August | 5500| 1100 | .. | 5900 | 2000 | 1000 September| ..| 700 | .. | .. | .. | .. October | ..| .. | .. | .. | .. | .. November | ..| .. | .. | .. | .. | .. December | ..| .. | .. | .. | .. | .. +-----+------+-------+------------+-------+-------- Year | ..| .. | .. | .. | .. | .. =========+=====+======+=======+============+=======+========

[11] Blue Nile water flowing up the White Nile and decreasing the normal discharge.

Appendix H

TABLE XXV.--_Minimum and Maximum Discharges of the Nile and its tributaries in 1902 and 1903._

Appendix I.

TABLE XXVI.--_Table of mean monthly Discharges at Khartoum, Assuân and Cairo, for the maximum, minimum and mean years._

=========+==================+==================+================== Month | 1877-78 | 1878-79 | MEAN OF | MINIMUM YEAR | MAXIMUM YEAR | 20 YEARS +-----+-----+------+-----+-----+------+-----+-----+------ | Blue| As- |Cairo.| Blue| As- |Cairo.| Blue| As- |Cairo. | Nile|suân.| | Nile|suân.| | Nile|suân.| | at | | | at | | | at | | |Khar-| | |Khar-| | |Khar-| | |toum.| | |toum.| | |toum.| | ---------+-----+-----+------+-----+-----+------+-----+-----+------ June | 1000| 800| 600 | 1000| 500| 250 | 1000| 750| 500 July | 2800| 2400| 1100 | 3500| 2000| 900 | 2800| 2200| 1100 August | 5300| 5600| 3900 | 8200| 7900| 5200 | 7000| 7900| 5300 September| 4700| 5900| 4400 |12500|12100| 8600 | 8500| 9200| 7200 October | 2500| 4000| 3900 | 8000| 9300|10300 | 4500| 6000| 6900 November | ..| 2400| 2550 | ..| 4700| 6500 | ..| 3300| 3700 December | ..| 1500| 1600 | ..| 3200| 3600 | ..| 2200| 2300 January | ..| 1200| 1300 | ..| 2400| 2600 | ..| 1600| 1600 February | ..| 800| 800 | ..| 2100| 2100 | ..| 1200| 1200 March | ..| 600| 550 | ..| 1900| 1900 | ..| 850| 800 April | ..| 500| 400 | ..| 1600| 1600 | ..| 700| 620 May | ..| 400| 300 | ..| 1500| 1500 | ..| 600| 520 ---------+-----+-----+------+-----+-----+------+-----+-----+------ Mean | ..| 2175| 1783 | ..| 4100| 3754 | ..| 3041| 2645 ---------+-----+-----+------+-----+-----+------+-----+-----+------

NOTE.--The very high discharges at Assuân and Cairo in April and May 1879; the minimum discharge of that year was about 1500 cubic metres per second. There has never been any discharge like that since.

Appendix J.

DISCHARGE TABLES OF THE DIFFERENT GAUGES OF THE NILE AND ITS TRIBUTAIRIES.

TABLE XXVII.--_Discharges table of the Victoria Nile at the Ripon Falls._

======+=========+===================================================== Gauge.|Discharge| Remarks. | m³ per | | second. | ------+---------+----------------------------------------------------- 0·0 | 380 |This discharge table is the mean of two alternative ·1 | 410 |tables; one assuming that the width of the sill of ·2 | 450 |the Ripon Falls was 127 metres as stated by Sir ·3 | 480 |William Garstin, the other assuming that only half ·4 | 520 |this width was the working sill, the rest being more ·5 | 550 |or less shallow water. The constant has been taken as ------+---------+·57. Sir William Garstin makes the width of the sill ·6 | 580 |70 + 40 + 13 = 127 metres, while Chavanne gives it as ·7 | 620 |82 + 14 + 55 + 22 = 173 metres. ·8 | 660 | ·9 | 700 |The wider the sill, the quicker is the rise of 1·0 | 740 |discharge from the measured discharge at the gauge of ------+---------+·51. ·1 | 780 | ·2 | 820 | ·3 | 860 | ·4 | 900 | ·5 | 950 | ------+---------+ ·6 | 990 | ·7 | 1040 | ·8 | 1090 | ·9 | 1140 | 2·0 | 1190 | ======+=========+=======================================================

TABLE XXVIII.--_Discharge table of the Albert Nile at Wadelaï._

======+============ | Discharge Gauge.|cubic metres | per second. ------+------------ 0·0 | 520 ·1 | 544 ·2 | 568 ·3 | 592 ·4 | 616 ·5 | 640 ·6 | 668 ·7 | 696 ·8 | 724 ·9 | 752 ------+------------ 1·0 | 780 ·1 | 810 ·2 | 840 ·3 | 870 ·4 | 900 ·5 | 930 ·6 | 962 ·7 | 994 ·8 | 1026 ·9 | 1058 ------+------------ 2·0 | 1090 ·1 | 1104 ·2 | 1118 ·3 | 1132 ·4 | 1146 ·5 | 1160 ======+============

TABLE XXIX.--_Discharge Table of the Albert Nile at the Gondokoro gauge._

======+============+=================================================== Gauge.| Discharge | Remarks. |cubic metres| | per second.| ------+------------+-------------------------------------------------- 0·0 | 550 |There is a scour of a metre and upwards at this ·2 | 600 |gauge site during a high flood. The pit is ·4 | 660 |apparently filled with sand during a low flood. ·6 | 740 | ·8 | 820 | 1·0 | 900 | ------+------------+ ·2 | 1060 | ·4 | 1220 | ·6 | 1380 | ·8 | 1540 | 2·0 | 1700 | ------+------------+ ·2 | 1900 | ·4 | 2100 | ·6 | 2300 | ·8 | 2500 | 3·0 | 2700 | ======+============+==================================================

TABLE XXX.--_Discharge table of the Albert Nile at the Mongalla gauge, 32 kilometres north of Gondokoro._

======+============+===================================== Gauge.| Discharge | Remarks. |cubic metres| | per second.| ------+------------+------------------------------------- 0·0 | 500 |This is a better site than Gondokoro. ·2 | 540 | ·4 | 580 | ·6 | 620 | ·8 | 660 | ------+------------+ 1·0 | 700 | ·2 | 780 | ·4 | 860 | ·6 | 940 | ·8 | 1020 | ------+------------+ 2·0 | 1100 | ·2 | 1300 | ·4 | 1500 | ·6 | 1700 | ·8 | 1900 | ------+------------+ 3·0 | 2100 | ·2 | 2300 | ·4 | 2500 | ·6 | 2700 | ======+============+=====================================

TABLE XXXI.--_Discharge table of the Sobat river at Dulaib Hilla._

======+=========== Gauge.| Discharge | in m³ |per second. ------+----------- 0·0 | 30 ·2 | 58 ·4 | 86 ·6 | 112 ·8 | 142 1·0 | 170 ·2 | 218 ·4 | 266 ·6 | 314 ·8 | 362 2·0 | 410 ·2 | 500 ·4 | 590 ·6 | 680 ·8 | 790 3·0 | 860 ·2 | 950 ·4 | 1040 ·6 | 1130 ·8 | 1220 4·0 | 1310 ======+===========

This gauge is in backwater when the north end of the Sudd region is flooded.

TABLE XXXII.--_Discharge Table of the White Nile at Tewfikieh downstream of Sobat junction referred to Tewfikia Gauge._

======+============ Gauge.| Discharge | in m³ |per second. ------+------------ -1·0 | 150 0·0 | 330 ·2 | 376 ·4 | 422 ·6 | 468 ·8 | 514 ------+------------ 1·0 | 560 ·2 | 616 ·4 | 672 ·6 | 728 ·8 | 784 ------+------------ 2·0 | 840 ·2 | 906 ·4 | 972 ·6 | 1038 ·8 | 1104 ------+------------ 3·0 | 1170 ·2 | 1270 ·4 | 1370 ·6 | 1470 ·8 | 1570 ------+------------ 4·0 | 1670 ·2 | 1770 ·4 | 1870 ·6 | 1970 ·8 | 2070 ------+------------ 5·0 | 2170 ======+============

TABLE XXXIII.--_Discharge Table of the White Nile at Duem in Winter and Summer when the Blue Nile is low._

======+===========+=================================================== Gauge.| Discharge | Remarks. | in m³ | |per second.| ------+-----------+--------------------------------------------------- 0·0 | 330 |This gauge is in backwater when the Blue Nile is ·1 | 354 |high. ·2 | 370 | ·3 | 402 | ·4 | 426 | ·5 | 450 | ------+-----------+ ·6 | 480 | ·7 | 515 | ·8 | 555 | ·9 | 600 | 1·0 | 650 | ======+===========+===================================================

This table is only very approximative.

TABLE XXXIV.--_Discharge table of the Blue Nile at Wad Medani._

======+=================== Gauge.| DISCHARGE | IN M³ PER SECOND +-------+----------- | River | River |rising.| Falling | | and | |Stationary. ------+-------+----------- 0·0 | 50 | 50 ·2 | 80 | 64 ·4 | 110 | 78 ·6 | 140 | 92 ·8 | 170 | 106 1·0 | 200 | 120 ·2 | 240 | 146 ·4 | 280 | 172 ·6 | 320 | 198 ·8 | 360 | 224 2·0 | 400 | 250 ·2 | 450 | 284 ·4 | 500 | 318 ·6 | 550 | 352 ·8 | 600 | 380 3·0 | 650 | 420 ·2 | 720 | 406 ·4 | 790 | 512 ·6 | 860 | 558 ·8 | 930 | 604 4·0 | 1000 | 650 ·2 | 1100 | 720 ·4 | 1200 | 790 ·6 | 1300 | 860 ·8 | 1400 | 930 5·0 | 1500 | 1000 ·2 | 1630 | 1100 ·4 | 1760 | 1200 ·6 | 1890 | 1300 ·8 | 2020 | 1400 6·0 | 2150 | 1500 ·2 | 2320 | 1620 ·4 | 2490 | 1740 ·6 | 2600 | 1800 ·8 | 2830 | 1980 7·0 | 3000 | 2100 ·2 | 3200 | 2340 ·4 | 3400 | 2580 ·6 | 3600 | 2820 ·8 | 3800 | 3060 8·0 | 4000 | 3300 ·2 | 4300 | 3540 ·4 | 4600 | 3780 ·6 | 4900 | 4020 ·8 | 5200 | 4200 9·0 | 5500 | 4500 ·2 | 5900 | 4840 ·4 | 6300 | 5180 ·6 | 6700 | 5520 ·8 | 7100 | 5860 10·0 | 7500 | 6200 ·2 | 8000 | 6580 ·4 | 8500 | 6960 ·6 | 9000 | 7340 ·8 | 9500 | 7720 11·0 | 10000 | 8100 ·2 | 10600 | 8540 ·4 | 11200 | 8980 ·6 | 11800 | 9420 ·8 | 12400 | 9800 12·0 | 13000 | 10300 ------+-------+-----------

(1) These discharges include the Rahad river. They represent the discharges below the Rahad river junction referred to the Wad Medani gauge.

(2) During a high flood the river scours, and it silts during a low flood; consequently for exact discharges below 5 metres, the section of the river should be taken annually in December.

TABLE XXXV.--_Discharge Table of the Blue Nile at the Khartoum Gauge._

======+===============+================ Gauge.| RIVER RISING | RIVER FALLING | | AND STATIONARY +---------------+---------------- |Discharge in m³|Discharge in m³ | per second. | per second. ------+---------------+---------------- - ·2 | 100 | 100 +0·0 | 175 | 120 ·2 | 260 | 145 ·4 | 360 | 170 ·6 | 470 | 195 ·8 | 580 | 220 ------+---------------+---------------- 1·0 | 700 | 250 ·2 | 860 | 340 ·4 | 1020 | 430 ·6 | 1180 | 520 ·8 | 1340 | 610 ------+---------------+---------------- 2·0 | 1500 | 700 ·2 | 1720 | 880 ·4 | 1940 | 1060 ·6 | 2160 | 1240 ·8 | 2380 | 1420 ------+---------------+---------------- 3·0 | 2600 | 1600 ·2 | 2980 | 1840 ·4 | 3360 | 2080 ·6 | 3740 | 2320 ·8 | 4120 | 2560 ------+---------------+---------------- 4·0 | 4500 | 2800 ·2 | 4980 | 3180 ·4 | 5460 | 3560 ·6 | 5940 | 3940 ·8 | 6420 | 4320 ------+---------------+---------------- 5·0 | 6900 | 4700 ·2 | 7560 | 5220 ·4 | 8220 | 5740 ·6 | 8880 | 6260 ·8 | 9540 | 6780 ------+---------------+---------------- 6·0 | 10200 | 7300 ·2 | 11000 | 7940 ·4 | 11800 | 8580 ·6 | 12600 | 9220 ·8 | 13400 | 9860 ------+---------------+---------------- 7·0 | 14200 | 10500 ·2 | ... | 11140 ·4 | ... | 11780 ·6 | ... | 12420 ======+===============+================

This gauge is in backwater when the White Nile is discharging more than the Blue Nile.

TABLE XXXVI.--_Discharge Table of the Atbara river referred to the Khasm el Girba Gauge._

======+========== Gauge.|Discharge. ------+---------- 0·0 | 0·0 ·2 | 20 ·4 | 40 ·6 | 60 ·8 | 80 ------+---------- 1·0 | 100 ·2 | 150 ·4 | 200 ·6 | 250 ·8 | 300 ------+---------- 2·0 | 350 ·2 | 444 ·4 | 538 ·6 | 632 ·8 | 726 ------+---------- 3·0 | 820 ·2 | 1012 ·4 | 1204 ·6 | 1396 ·8 | 1588 ------+---------- 4·0 | 1780 ·2 | 2078 ·4 | 2376 ·6 | 2674 ·8 | 2972 ------+---------- 5·0 | 3270 ·2 | 3596 ·4 | 3922 ·6 | 4248 ·8 | 4574 ------+---------- 6·0 | 4900 ======+==========

TABLE XXXVII.--_Discharge table for the Assuân, Assiut and Cairo Gauges._

The gauges are in metres and are referred to mean low-water level as zero.

The zero is: at Assuân R. L. 85·00 at Assiut „ 45·55 at Cairo „ 12·25

=N.B.=--At Assiut R. L. 45·55, according to the reservoir levels, is R. L. 45·05 according to the 4th Circle levels.

(The discharges are in cubic metres per second.)

This discharge table may be used approximately for any gauge on the Nile north of Assuân with its zero at mean low-water level; adding ·5 to the gauge in Kena Province, and deducting ·5 from the gauge in Minieh and Beni-Suef.

If the river is rising, take the discharge corresponding to the higher gauge; if falling or stationary to the lower one.

======+========== Gauge.|Discharge. ------+---------- -1·0 | 360 - ·8 | 406 - ·6 | 452 - ·4 | 498 - ·2 | 544 ------+---------- 0·0 | 590 ·2 | 668 ·4 | 746 ·6 | 824 ·8 | 902 ------+---------- 1·0 | 980 ·2 | 1086 ·4 | 1192 ·6 | 1298 ·8 | 1404 ------+---------- 2·0 | 1510 ·2 | 1652 ·4 | 1794 ·6 | 1936 ·8 | 2078 ------+---------- 3·0 | 2220 ·2 | 2408 ·4 | 2596 ·6 | 2784 ·8 | 2972 ------+---------- 4·0 | 3160 ·2 | 3404 ·4 | 3648 ·6 | 3892 ·8 | 4136 ------+---------- 5·0 | 4380 ·2 | 4674 ·4 | 4968 ·6 | 5262 ·8 | 5556 ------+---------- 6·0 | 5850 ·2 | 6150 ·4 | 6450 ·6 | 6800 ·8 | 7200 ------+---------- 7·0 | 7600 ·2 | 8000 ·4 | 8400 ·6 | 8800 ·8 | 9300 ------+---------- 8·0 | 9800 ·2 | 10300 ·4 | 10900 ·6 | 11500 ·8 | 12100 ------+---------- 9·0 | 12800 ·2 | 13600 ======+==========

TABLE XXXVIII.

Discharge Table of the Wady Halfa Gauge, for use at Assuân when the Assuân Dam is being regulated on, and consequently the Assuân Gauge no longer represents the normal discharge of the Nile. At this stage of the river it may be assumed that the water travels normally between Wady Halfa and Assuân in 3 or 4 days.

======+============ | Discharge Gauge.|cubic metres | per second. ------+------------ 0·8 | 370 1·0 | 440 ·2 | 516 ·4 | 592 ·6 | 688 ·8 | 804 ------+------------ 2·0 | 920 ·2 | 1048 ·4 | 1176 ·6 | 1314 ·8 | 1462 3·0 | 1610 ------+------------ 3·2 | 1800 ·4 | 1990 ·6 | 2180 ·8 | 2370 ------+------------ 4·0 | 2560 ·2 | 2802 ·4 | 3044 ·6 | 3286 ·8 | 3528 5·0 | 3770 ======+============

TABLE XXXIX.--_Discharge of the Rosetta Branch of the Nile referred to the Delta Barrage north of Cairo._

1890 ======+============== Gauge.| Discharge |m³ per second. ------+-------------- 0·00 | 0 ·25 | 50 ·50 | 100 ·75 | 150 ------+-------------- 1·00 | 200 ·25 | 287 ·50 | 375 ·75 | 463 ------+-------------- 2·00 | 550 ·25 | 700 ·50 | 850 ·75 | 1000 ------+-------------- 3·00 | 1150 ·25 | 1312 ·50 | 1475 ·75 | 1638 ------+-------------- 4·00 | 1800 ·25 | 1975 ·50 | 2150 ·75 | 2325 ------+-------------- 5·00 | 2500 ·25 | 2700 ·50 | 2900 ·75 | 3100 ------+-------------- 6·00 | 3300 ·25 | 3525 ·50 | 3750 ·75 | 3975 ------+-------------- 7·00 | 4200 ·25 | 4450 ·50 | 4700 ·75 | 4950 ------+-------------- 8·00 | 5200 ·25 | 5475 ·50 | 5750 ·75 | 6025 ------+-------------- 9·00 | 6300 ======+==============

Zero of the gauge R. L. 10·00 metres above mean sea.

TABLE XL.--_Discharge of the Damietta Branch of the Nile referred to the Delta Barrage north of Cairo._

1890 ======+========= Gauge.|Discharge | m³ per | second. ------+--------- 0·00 | 0 ·25 | 20 ·50 | 40 ·75 | 60 ------+----------- 1·00 | 80 ·25 | 110 ·50 | 140 ·75 | 170 ------+----------- 2·00 | 200 ·25 | 262 ·50 | 325 ·75 | 388 ------+----------- 3·00 | 450 ·25 | 537 ·50 | 625 ·75 | 712 ------+----------- 4·00 | 800 ·25 | 925 ·50 | 1050 ·75 | 1175 ------+----------- 5·00 | 1300 ·25 | 1450 ·50 | 1600 ·75 | 1750 ------+----------- 6·00 | 1900 ·25 | 2075 ·50 | 2250 ·75 | 2425 ------+----------- 7·00 | 2600 ·25 | 2800 ·50 | 3000 ·75 | 3200 ------+----------- 8·00 | 3400 ·25 | 3625 ·50 | 3850 ·75 | 4075 ------+----------- 9·00 | 4300 ------+-----------

NOTE.--Zero of the gauge R. L. 10·00 metres above mean sea.

Appendix K.

TABLES GIVING DETAILED INFORMATION ABOUT THE NILE BETWEEN ASSUÂN AND CAIRO.

TABLE XLI.--_Date of Heights of Minimum gauges in summer and Maximum gauges in flood at Assuan._

=====+===================+=================== Year.| MINIMUM SUMMER | MAXIMUM FLOOD +------------+------+------------+------ | Date. |Gauge.| Date. |Gauge. -----+------------+------+------------+------ 1873| 5 June | -0·37| 1 September| 7·66 1874|30 May | -0·64| 6 September| 8·97 1875|23 May | -0·17|11 September| 8·36 1876|15 June | +0·13| 7 September| 8·68 1877|27 May | +0·10|20 August | 6·40 1878|23 June | -0·71| 1 October | 9·15 1879|23 May | +1·88|13 September| 8·59 1880| 9 June | +0·82| 4 September| 7·82 1881|14 May | +0·00| 4 September| 8·14 1882|23 June | -0·55|28 August | 8·00 1883|22 June | +0·04|17 September| 8·18 1884|27 May | +0·37| 1 September| 7·73 1885|21 June | -0·44|28 August | 8·05 1886| 3 June | -0·06|22 September| 8·04 1887| 8 May | -0·03| 1 September| 8·81 1888| 8 June | -0·08|24 August | 7·08 1889|24 June | -0·60| 2 September| 8·36 1890| 8 June | -0·60| 2 September| 8·72 1891|19 May | -0·21|27 September| 7·84 1892|18 June | -0·64|20 September| 8·88 1893|18 June | +0·35|14 September| 7·75 1894|16 June | +0·06|18 September| 8·61 1895|23 June | +0·78|10 September| 8·68 1896|13 June | +0·49| 3 September| 8·63 1897|31 May | +0·62| 1 September| 7·80 1898|23 June | -0·25|29 August | 8·63 1899| 1 June | +0·15| 4 September| 6·67 1900|15 May | -0·93|19 August | 7·91 1901|10 May | -0·46| 6 September| 7·82 1902|12 May | -0·48|17 September| 6·72 1903|16 April | -0·68|27 August | 7·93 1904| 5 June | -0·20|13 August | 6·97 =====+============+======+============+======

Zero is R. L. 85·00 metres or mean low water level.

TABLE XLII.--_Table giving areas of cross sections of the Nile, from Assuân to Cairo._

================+=======+============================================= Locality. | Length| MEAN AREA IN SQUARE METRES | in +-----+-------+-------+-------+-------+------- | kilo- |Below| Below | Below | Below | Below | Below |metres.|zero.| 6 | 7 | 8 | 8.5 | 9 | | |metres.|metres.|metres.|metres.|metres. ----------------+-------+-----+-------+-------+-------+-------+------- Assuân to Ramâdi| 81 | 1024| 4930 | 5808 | 6754 | 7337 | 7993 Ramâdi to Esna | 76 | 674| 4554 | 5461 | 6398 | 6966 | 7695 Esna to Kena | 115 | 852| 4476 | 5336 | 6221 | 6726 | 7363 Kena to Sohâg | 158 | 973| 4718 | 5600 | 6535 | 7121 | 7873 Sohâg to Assiout| 98 | 1037| 5220 | 6305 | 7705 | 8683 | 9749 Assiout to Minia| 138 | 899| 5149 | 6205 | 7783 | 8845 | 9937 Minia to Beni- | | | | | | | Suêf | 117 | 915| 5035 | 6007 | 7315 | 8196 | 9140 Beni-Suêf to | | | | | | | Koshesha | 34 | 665| 5040 | 6080 | 7532 | 8379 | 9247 Koshesha to | | | | | | | Cairo | 81 | 1031| 5364 | 6388 | 7813 | 8648 | 9495 Cairo to the | | | | | | | Barrage | 24 | 1402| 5414 | 6628 | 8346 | 9258 | 10184 ----------------+-------+-----+-------+-------+-------+-------+------- Assuân to | | | | | | | Assiout | 528 | 920| 4760 | 5680 | 6690 | 7310 | 8080 Assiout to | | | | | | | Koshesha | 289 | 870| 5080 | 6100 | 7550 | 8510 | 9520 Koshesha to | | | | | | | Cairo | 81 | 1030| 5360 | 6380 | 7810 | 8640 | 9490 ----------------+-------+-----+-------+-------+-------+-------+------- Assuân to Cairo | 898 | 910| 4930 | 5890 | 7080 | 7830 | 8690 ================+=======+=====+=======+=======+=======+=======+=======

TABLE XLIII.--_Table of the cubic contents of the trough of the Nile from Assuân to Cairo in millions of cubic metres._

=====================+========+==============================+ Locality. | Length | CONTENTS IN MILLIONS | |in kilo-| OF CUBIC METRES | |metres. +-----+----+----+----+----+----+ | |Below|From| 6.0| 7.0| 8.0| 8.5| | |zero.|zero| to | to | to | to | | | | to | 7.0| 8.0| 8.5| 9.0| | | |6.0 | | | | | ---------------------+--------+-----+----+----+----+----+----+ | | | | | | | | Assuân to Ramadi | 81 | 83| 316| 711| 77| 47| 53| Ramadi to Esna | 76 | 51| 295| 69| 71| 43| 56| Esna to Kena | 115 | 98| 417| 99| 102| 58| 73| Kena to Sohag | 128 | 154| 592| 139| 148| 83| 119| Sohag to Assiout | 98 | 102| 410| 106| 137| 96| 104| Assiout to Minieh | 138 | 124| 586| 146| 218| 147| 151| Minieh to Beni Suêf | 117 | 107| 482| 114| 153| 103| 110| Beni Suêf to Kushesha| 34 | 23| 149| 35| 49| 29| 29| Kushesha to Cairo | 81 | 84| 351| 83| 115| 68| 69| Cairo to the Barrage | 28 | 34| 96| 29| 41| 22| 22| +--------+-----+----+----+----+----+----+ Assuân to Assiout | 528 | 487|2030| 484| 534| 327| 405| Assiout to Kushesha | 289 | 254|1217| 295| 420| 278| 291| Kushesha to Cairo | 81 | 84| 351| 83| 115| 68| 69| +--------+-----+----+----+----+----+----+ Assuân to Cairo | 898 | 825|3598| 862|1069| 673| 765| =====================+========+=====+====+====+====+====+====+

=====================+========+============================== Locality. | Length | CONTENTS IN MILLIONS |in kilo-| OF CUBIC METRES |metres. +-----+-----+-----+-----+----- | |Below|Below|Below|Below|Below | | 6.0 | 7.0 | 8.0 | 8.5 | 9.0 | | | | | | | | | | | ---------------------+--------+-----+-----+-----+-----+----- | | | | | | Assuân to Ramadi | 81 | 399| 470| 547| 594| 647 Ramadi to Esna | 76 | 346| 415| 486| 529| 585 Esna to Kena | 115 | 514| 614| 715| 773| 847 Kena to Sohag | 128 | 745| 885| 1032| 1125| 1244 Sohag to Assiout | 98 | 512| 618| 755| 851| 955 Assiout to Minieh | 138 | 710| 856| 1074| 1220| 1371 Minieh to Beni Suêf | 117 | 589| 703| 856| 859| 1069 Beni Suêf to Kushesha| 34 | 171| 207| 256| 285| 314 Kushesha to Cairo | 81 | 434| 517| 633| 700| 769 Cairo to the Barrage | 28 | 130| 159| 200| 222| 244 +--------+-----+-----+-----+-----+----- Assuân to Assiout | 528 | 2517| 3001| 3535| 3862| 4267 Assiout to Kushesha | 289 | 1471| 1766| 2186| 2464| 2755 Kushesha to Cairo | 81 | 435| 518| 633| 701| 770 +--------+-----+-----+-----+-----+----- Assuân to Cairo | 898 | 4423| 5285| 6354| 7027| 7792 =====================+========+=====+=====+=====+=====+=====

TABLE XLIV.--_Widths of water surface from Assuân to Cairo._

=========+=========+============================ From. | To. |MEAN WIDTH OF WATER SURFACE | +---+----+----+----+----+---- | | 0 | 6·0| 7·0| 8·0| 8·5| 9·0 ---------+---------+---+----+----+----+----+---- Assuân |Ramadi |400| 840| 880|1030|1270|1400 Ramadi |Esna |340| 850| 890|1030|1260|1620 Esna |Kena |350| 820| 850| 940|1120|1400 Kena |Sohag |380| 870| 890|1000|1300|1560 Sohag |Assiout |400|1000|1170|1720|2080|2170 Assiout |Minieh |390| 970|1180|1890|2060|2080 Minieh |Beni Suêf|490| 960|1300|1550|1800|1840 Beni Suêf|Kushesha |500|1000|1390|1690|1720|1730 Kushesha |Cairo |450| 960|1100|1570|1700|1700 Cairo |Barrage |440| 940|1460|1840|1860|1890 ---------+---------+---+----+----+----+----+----- Assuân |Assiout |370| 880| 940|1140|1410|1630 Assiout |Kushesha |460| 980|1290|1710|1860|1880 Kushesha |Cairo |450| 960|1100|1570|1700|1700 ---------+---------+---+----+----+----+----+---- Assuân |Cairo |430| 940|1110|1470|1660|1740 ---------+---------+---+----+----+----+----+----

_Area of water surface in millions of square metres._

=========+=========+===+====+====+====+====+==== Assuân |Assiout |200| 470| 500| 600| 740| 860 Assiout |Cairo |130| 280| 370| 490| 540| 540 Assuân |Cairo |400| 840|1000|1320|1490|1560 =========+=========+===+====+====+====+====+====

TABLE XLV.--_Slope of water surface in the Nile. Assuân to Cairo._

============+============+========+========+=======+======= From. | To. |Distance|Distance| Slope | Slope | |in kilo-|in kilo-| in | in | |metres |metres | flood.|summer. | |down the|down the| | | |centre |summer | | | |line of |channel.| | | |the | | | | |flood. | | | ------------+------------+--------+--------+-------+------- Assuân |Silsila | 70 | 72 |¹⁄₁₁₅₀₀|¹⁄₁₂₆₀₀ Silsila |Kasr-es-Saad| 250 | 258 |¹⁄₁₄₈₀₀|¹⁄₁₄₈₀₀ Kasr-es-Saad|Khazindaria | 150 | 159 |¹⁄₁₂₃₀₀|¹⁄₁₃₄₀₀ Khazindaria |Assiout | 60 | 63 |¹⁄₁₁₈₀₀|¹⁄₁₄₅₀₀ Assiout |Beni Mazâr | 180 | 196 |¹⁄₁₁₀₀₀|¹⁄₁₁₈₀₀ Beni Mazâr |Ashmant | 90 | 94 |¹⁄₁₁₀₀₀|¹⁄₁₁₄₀₀ Ashmant |Cairo | 100 | 106 |¹⁄₁₁₆₀₀|¹⁄₁₂₃₀₀ Cairo |Barrage | 23 | 25 |¹⁄₁₀₈₀₀|¹⁄₂₀₀₀₀ ------------+------------+--------+--------+-------+------- Assuân | Cairo | 900 | 948 |¹⁄₁₂₂₀₀|¹⁄₁₃₀₀₀ ============+============+========+========+=======+=======

TABLE XLVI.--_Mean low water level of the Nile--Assuân to Cairo._

========+===============+=========+==========+======== Distance| Name of | R. L. | R. L. |Distance from | Locality. |According|According | from Assuân | | to | to | Assuân along | |reservoir|inspectors| along centre | | levels. | of | summer of | | | irriga- |Channel. flood. | | | tion. | --------+---------------+---------+----------+-------- 0 |Assuân | 85·0 | 85·0 | 0 70 |Gebel Silsila | 79·3 | 79·4 | 72 106 |Edfu | 76·7 | 77·0 | .. 157 |Esna | 73·1 | 72·6 | .. 194 |Armant | 70·1 | 69·6 | .. 213 |Luxor | 69·0 | 68·5 | .. 272 |Kena | 65·3 | 64·8 | .. 320 |Kasr-es-Saad | 61·7 | 61·2 | 330 328 |Heu | 61·2 | 60·7 | .. 333 |Naga Hamadi | 61·0 | 60·5 | .. 365 |Abu Shusha | 58·6 | 58·1 | .. 373 |Balyana | 58·3 | 57·8 | .. 390 |Girga | 56·9 | 56·5 | .. 429 |Sohâg | 53·8 | 53·2 | .. 470 |Khazindaria | 49·9 | 49·4 | 489 505 |Aboutig Escape | 47·7 | 47·1 | .. 530 |Assiout[12] | 45·55 | 45·05 | 552 598 |Derut Escape | 39·1 | 38·5 | .. 627 |Roda | 36·3 | 35·7 | .. 666 |Minia | 32·6 | 32·0 | .. 710 |Beni Mazâr | 28·9 | .. | 748 |Beni Suêf[13] | 22·1 | 21·8 | .. 800 |Ashmant | 20·5 | 20·2 | 842 |Kushesha Escape| 18·9 | 18·6 | .. |El-Ayât | 15·8 | 15·5 | .. 898 |Cairo gauge | 12·10 | 12·25 | .. 900 |Cairo | 12·00 | 12·1 | 948 ========+===============+=========+==========+========

[12] Downstream of the Assiout weir.

[13] The Beni Suêf gauge is unreliable in summer as it is on a branch of the river which is dammed by the villagers.

TABLE XLVII.--_Discharge table of the Upper Egypt canals._

A low Nile flood is 6·4 metres } A mean Nile flood is 7·5 „ } at Assuân. A high Nile flood is 8·3 „ }

The discharges of the Upper Egypt canals corresponding to the Assuân gauges are approximately as follows:--

Assuân 6·0 1300 ·1 1370 ·2 1440 ·3 1510 ·4 1580--Low Nile flood. ·5 1650 ·6 1620 ·7 1790 ·8 1860 ·9 1930 7·0 2000 ----------- ·1 2070 ·2 2140 ·3 2210 ·4 2280 ·5 2350--Mean Nile flood. ·6 2420 ·7 2490 ·8 2560 ·9 2630 8·0 2700 ----------- ·1 2770 ·2 2840 ·3 2910--High Nile flood. ·4 2980 ·5 3050 ·6 3120 ·7 3190 ·8 3260 ·9 3330 9·0 3400 =======================================

R. L. of zero in R. L. 85·00 metres.

TABLE XLVIII.--_Canal discharges between Assuan and Assiut._

DISCHARGES OF THE CANALS IN UPPER EGYPT IN 1892.

==============+===================+============================= Name of Canal.| AUGUST | SEPTEMBER +----+----+----+----+----+----+----+----+----+---- | 15 | 20 | 25 | 31 | 5 | 10 | 15 | 20 | 25 | 30 --------------+----+----+----+----+----+----+----+----+----+---- Ramadi | 55| 66| 80| 76| 82| 85| 89| 91| ..| .. Um-Ads | 8| 9| 12| 13| 16| 18| 20| ..| ..| .. Afsûn | 25| 29| 37| 39| 42| 43| 45| ..| ..| .. Fadilia | 12| 26| 44| 49| 52| 55| 50| ..| ..| .. Toukh | 10| 19| 37| 42| 44| 58| 60| ..| ..| .. Rannan | 28| 36| 53| 59| 62| 67| 70| ..| ..| .. Dumrania | 26| 35| 56| 62| 65| 70| 74| ..| ..| .. Rashwania | 35| 41| 58| 61| 64| 70| 73| ..| ..| .. Kasra | 49| 62| 104| 133| 138| 150| 150| ..| ..| .. Zarzria | 24| 30| 64| 76| 77| 90| 90| ..| ..| .. Girgawia | 54| 59| 84| 95| 96| 120| 120| ..| ..| .. Sohagia | 380| 386| 470| 485| 492| 520| 500| ..| ..| .. Tahta | 44| 45| 66| 75| 77| 82| 85| ..| ..| .. Shatura | 25| 24| 39| 47| 49| 45| 40| ..| ..| .. Ibrahimia | 460| 440| 540| 600| 640| 700| 740| ..| ..| .. Waladia | 6| 6| 14| 20| 24| 24| 24| ..| ..| .. Minor Canals | 10| 15| 20| 30| 30| 30| 20| ..| ..| .. +----+----+----+----+----+----+----+----+----+---- Total left | | | | | | | | | | bank |1250|1320|1790|1980|2060|2250|2270| ..| ..| .. +----+----+----+----+----+----+----+----+----+---- Kilibia | 6| 11| 17| 20| 24| 28| 32| ..| ..| .. Maala | 5| 5| 18| 22| 26| 30| 32| ..| ..| .. Bayadiâ | 30| 36| 62| 69| 77| 85| 90| ..| ..| .. Shanhuria | 46| 55| 98| 108| 116| 120| 125| ..| ..| .. Shekhia | 5| 6| 10| 11| 12| 12| 12| ..| ..| .. Gilasi | 19| 30| 58| 64| 68| 70| 72| ..| ..| .. Samatha | 12| 19| 41| 48| 52| 60| 60| ..| ..| .. Tarif | 10| 15| 20| 25| 25| 25| 25| ..| ..| .. Hawis | 15| 22| 38| 41| 44| 51| 56| ..| ..| .. Ahaiwia | 10| 15| 20| 25| 25| 25| 25| ..| ..| .. Isaiwia | 35| 35| 55| 60| 63| 70| 70| ..| ..| .. Khizindaria | 63| 62| 86| 96| 98| 110| 95| ..| ..| .. Maanah | 35| 41| 58| 67| 71| 80| 85| ..| ..| .. Sant | 6| 7| 8| 10| 10| 12| 12| ..| ..| .. Minor Canals | 4| 8| 12| 15| 15| 15| 15| ..| ..| .. +----+----+----+----+----+----+----+----+----+---- Total right | | | | | | | | | | bank | 300| 370| 600| 680| 730| 800| 810| ..| ..| .. +----+----+----+----+----+----+----+----+----+---- Total both | | | | | | | | | | banks |1550|1690|2390|2660|2790|3050|3080| ..| ..| .. ==============+====+====+====+====+====+====+====+====+====+====

TABLE XLVIII (continued).--_Canal discharges between Assiout and Cairo._

DISCHARGES OF THE CANALS IN UPPER EGYPT IN 1892.

_Canal discharges between Assuân and Cairo._

==============+====+====+====+====+====+====+====+====+====+==== Left bank |1510|1540|2110|2430|2540|2750| ..| ..| ..| .. Right bank | 340| 400| 670| 760| 810| 880| ..| ..| ..| .. +----+----+----+----+----+----+----+----+----+---- Total |1850|1940|2780|3190|3390|3630| ..| ..| ..| .. +----+----+----+----+----+----+----+----+----+---- Assuân gauge | 6·7| 7·4| 8·3| 8·3|8·6 | 8·8| 8·7| ..| ..| .. Assiout gauge | 6·1| 5·9| 6·8| 7·2|7·4 | 7·7| 8·1| ..| ..| .. Cairo gauge | 5·8| 5·5| 5·8| 6·7|7·0 | 7·2| 7·7| ..| ..| .. ==============+====+====+====+====+====+====+====+====+====+====

TABLE XLIX.--_Canal discharges between Assuan and Assiut._

DISCHARGES OF THE CANALS IN UPPER EGYPT IN 1893.

==============+===================+=============================+ Name of Canal.| AUGUST | SEPTEMBER | +----+----+----+----+----+----+----+----+----+----+ | 15 | 20 | 25 | 31 | 5 | 10 | 15 | 20 | 25 | 30 | --------------+----+----+----+----+----+----+----+----+----+----+ Ramadi | 50| 56| 58| 56| 55| 60| 64| 61| 64| 61| Um-Ads | 10| 12| 12| 12| 13| 14| 15| 15| 15| 15| Asfun | 28| 33| 34| 33| 31| 33| 35| 33| 34| 33| Fadilia | 17| 24| 26| 26| 22| 24| 29| 24| 22| 20| Toukh | 19| 24| 26| 27| 21| 24| 24| 22| 27| 26| Rannan | 20| 26| 29| 28| 25| 25| 30| 27| 30| 28| Dumrania | 33| 39| 44| 43| 39| 41| 46| 43| 46| 44| Rashwania | 45| 52| 60| 55| 50| 53| 68| 60| 65| 60| Kasra | 70| 72| 82| 79| 72| 76| 87| 82| 87| 82| Zarzuria | 38| 44| 47| 46| 45| 47| 52| 46| 52| 46| Gergawia | 55| 55| 59| 58| 56| 56| 62| 57| 62| 57| Sohagia | 390| 380| 400| 390| 350| 360| 420| 390| 430| 410| Tahta | 45| 46| 47| 46| 44| 45| 51| 44| 52| 47| Shatura | 20| 23| 26| 25| 22| 17| 28| 25| 29| 28| Ibrahimia | 520| 520| 560| 560| 540| 540| 600| 580| 600| 600| Waladia | 10| 11| 12| 12| 11| 11| 11| 12| 12| 12| Minor Canals | 10| 15| 20| 20| 20| 20| 20| 20| 20| 20| +----+----+--------------+----+----+----+----+----+ Total left | | | | | | | | | | | bank |1380|1430|1550|1510|1420|1440|1640|1540|1650|1590| +----+----+----+----+----+----+----+----+----+----+ Kilibia | 11| 13| 15| 14| 14| 15| 17| 16| 16| 16| Maala | 11| 12| 13| 12| 13| 14| 16| 16| 16| 16| Bayadia | 36| 44| 48| 46| 40| 45| 52| 44| 42| 30| Shanhuria | 56| 64| 69| 63| 62| 64| 70| 50| 40| 30| Shekhia | 6| 7| 9| 8| 6| 6| 4| 5| 6| 6| Gilasi | 24| 32| 34| 32| 29| 30| 35| 31| 34| 33| Samatha | 17| 24| 27| 25| 22| 24| 28| 25| 27| 26| Tarif | 12| 14| 16| 15| 14| 15| 17| 16| 17| 16| Hawis | 24| 27| 29| 29| 27| 27| 29| 27| 25| 16| Ahaiwia | 15| 16| 16| 16| 12| 12| 10| 7| 4| 4| Isawia | 30| 37| 40| 37| 37| 39| 40| 40| 43| 40| Khazindaria | 60| 62| 67| 66| 60| 60| 66| 65| 55| 50| Maanah | 20| 30| 32| 32| 29| 32| 33| 34| 24| 24| Sant | 6| 6| 9| 8| 7| 7| 7| 7| 7| 7| Minor Canals | 4| 7| 10| 10| 10| 10| 10| 10| 10| 10| +----+----+----+----+----+----+----+----+----+----+ Total right | | | | | | | | | | | bank | 340| 400| 430| 410| 390| 400| 430| 390| 370| 320| +----+----+----+----+----+----+----+----+----+----+ Total both | | | | | | | | | | | banks |1720|1830|1980|1920|1810|1840|2070|1930|2020|1910| ==============+====+====+====+====+====+====+====+====+====+====+

==============+======================== Name of Canal.| OCTOBER +----+----+----+----+---- | 5 | 10 | 15 | 20 | 25 --------------+----+----+----+----+---- Ramadi | ..| ..| ..| ..| .. Um-Ads | ..| ..| ..| ..| .. Asfun | ..| ..| ..| ..| .. Fadilia | ..| ..| ..| ..| .. Toukh | ..| ..| ..| ..| .. Rannan | ..| ..| ..| ..| .. Dumrania | ..| ..| ..| ..| .. Rashwania | ..| ..| ..| ..| .. Kasra | ..| ..| ..| ..| .. Zarzuria | ..| ..| ..| ..| .. Gergawia | ..| ..| ..| ..| .. Sohagia | ..| ..| ..| ..| .. Tahta | ..| ..| ..| ..| .. Shatura | ..| ..| ..| ..| .. Ibrahimia | ..| ..| ..| ..| .. Waladia | ..| ..| ..| ..| .. Minor Canals | ..| ..| ..| ..| .. +----+----+----+----+---- Total left | | | | | bank | ..| ..| ..| ..| .. +----+----+----+----+---- Kilibia | ..| ..| ..| ..| .. Maala | ..| ..| ..| ..| .. Bayadia | ..| ..| ..| ..| .. Shanhuria | ..| ..| ..| ..| .. Shekhia | ..| ..| ..| ..| .. Gilasi | ..| ..| ..| ..| .. Samatha | ..| ..| ..| ..| .. Tarif | ..| ..| ..| ..| .. Hawis | ..| ..| ..| ..| .. Ahaiwia | ..| ..| ..| ..| .. Isawia | ..| ..| ..| ..| .. Khazindaria | ..| ..| ..| ..| .. Maanah | ..| ..| ..| ..| .. Sant | ..| ..| ..| ..| .. Minor Canals | ..| ..| ..| ..| .. +----+----+----+----+---- Total right | | | | | bank | ..| ..| ..| ..| .. +----+----+----+----+---- Total both | | | | | banks | ..| ..| ..| ..| .. ==============+====+====+====+====+====

TABLE XLIX (continued).--_Canal discharges between Assiout and Cairo._

DISCHARGES OF THE CANALS IN UPPER EGYPT IN 1893.

==============+======================== Name of Canal.| OCTOBER +----+----+----+----+---- | 5 | 10 | 15 | 20 | 25 --------------+----+----+----+----+---- Beni Husain | ..| ..| ..| ..| .. Abu-Bakra | ..| ..| ..| ..| .. Sultani | ..| ..| ..| ..| .. Nina | ..| ..| ..| ..| .. Bahabshin | ..| ..| ..| ..| .. Magnuna | ..| ..| ..| ..| .. Kushâska | ..| ..| ..| ..| .. Zawia | ..| ..| ..| ..| .. Girza | ..| ..| ..| ..| .. Zumr | ..| ..| ..| ..| .. Minor Canals | ..| ..| ..| ..| .. +----+----+----+----+---- Total left | | | | | bank | ..| ..| ..| ..| .. +----+----+----+----+---- Ali bey | ..| ..| ..| ..| .. Khassab | ..| ..| ..| ..| .. Minor Canals | ..| ..| ..| ..| .. +----+----+----+----+---- Total right | | | | | bank | ..| ..| ..| ..| .. +----+----+----+----+---- Total both | | | | | banks | ..| ..| ..| ..| .. ==============+====+====+====+====+====

_Canal discharges between Assuan and Cairo._

==============+====+====+====+====+====+====+====+====+====+====+ Left bank |1660|1690|1810|1760|1640|1650|1960|1760|1870|1810| Right bank | 380| 450| 480| 470| 430| 430| 470| 430| 410| 370| +----+----+----+----+----+----+----+----+----+----+ Total |2040|2140|2290|2230|2070|2080|2330|2190|2280|2180| --------------+----+----+----+----+----+----+----+----+----+----+ Assuân gauge | 7·0| 7·3| 7·4| 7·3| 7·2| 7·5| 7·6| 7·4| 7·1| 7·3| Assiout gauge | 6·2| 6·2| 6·4| 6·3| 6·2| 6·3| 6·5| 6·5| 6·6| 6·6| Cairo gauge | 5·8| 5·6| 5·9| 6·0| 6·0| 5·8| 6·0| 6·0| 6·1| 6·3| ==============+====+====+====+====+====+====+====+====+====+====+

==============+====+====+====+====+==== Left bank | ..| ..| ..| ..| .. Right bank | ..| ..| ..| ..| .. +----+----+----+----+---- Total | ..| ..| ..| ..| .. --------------+----+----+----+----+---- Assuân gauge | 7·1| 7·3| 6·9| 6·3| 6·0 Assiout gauge | 6·4| 6·5| 6·7| 6·7| .. Cairo gauge | 6·2| 6·1| 6·4| 6·5| 2·7 ==============+====+====+====+====+====

TABLE L.--_Calculated Cairo gauges corresponding to Assuân gauges if basin irrigation were to be changed into perennial irrigation._

1874. ============+======+========+======+======+======+======+=============== Date at |Gauges| Dis- |Water |Trough| Dis- |Gauges| Date at Assuân. | at | charges| con- | of |charge| at | Cairo. | As- | at | sump-| Nile | at |Cairo.| | suân.| Assuân.| tion |Assuân|Cairo.| | | | |Assuân| to | | | | | | to |Cairo.| | | | | |Cairo.| | | | ------------+------+--------+------+------+------+------+--------------- August 5| 6·9 | 7600 |-1020 |-1000 | 5580| 5·8 |10th August. „ 10| 7·4 | 8600 | do | do | 6580| 6·4 |15th „ „ 15| 8·5 | 11500 | do | do | 9480| 7·8 |20th „ „ 20| 8·6 | 11800 | do | do | 9780| 7·9 |25th „ „ 25| 8·7 | 12100 | do | do | 10080| 8·1 |31st „ | | | | +------+------+--------------- „ 31| 8·7 | 12100 | do | do | 10080| 8·2 | 5th September. ------------+------+--------+------+------+ | | September 5| 9·0 | 12800 | do | do | 10780| 8·3 |10th „ „ 10| 8·8 | 11800 | do | 0 | 10780| 8·4 |15th „ „ 15| 8·7 | 11500 | do | +500 | 10980| 8·5 |20th „ „ 20| 8·4 | 10600 | do | do | 10080| 8·2 |25th „ „ 25| 8·4 | 10600 | do | do | 10080| 8·2 |30th „ | | | | +------+------+--------------- „ 30| 8·2 | 10050 | do | do | 9430| 7·9 | 5th October. ------------+------+--------+------+------+ | | October 5| 7·9 | 9300 | do | do | 8780| 7·6 |10th „ „ 10| 7·6 | 8600 | do | +700 | 8280| 7·4 |15th „ „ 15| 7·2 | 7800 | do | do | 7480| 7·0 |20th „ „ 20| 6·6 | 6600 | do | do | 6280| 6·3 |25th „ „ 25| 6·2 | 6000 | do | do | 5680| 5·9 |31st „ | | | | +------+------+--------------- „ 31| 5·6 | 5100 | do | do | 4780| 5·3 | 5th November. ------------+------+--------+------+------+ | | November 5| 5·2 | 4500 | do | do | 4780| 4·3 |10th „ ============+======+========+======+======+======+======+===============

TABLE LI.--_Calculated Cairo gauges corresponding to Assuân gauges if basin irrigation were to be changed into perennial irrigation._

1877. ============+======+========+======+======+======+======+=============== Date at |Gauges| Dis- |Water |Trough| Dis- |Gauges| Date at Assuân. | at | charges| con- | of |charge| at | Cairo. | As- | at | sump-| Nile | at |Cairo.| | suân.| Assuân.| tion |Assuân|Cairo.| | | | |Assuân| to | | | | | | to |Cairo.| | | | | |Cairo.| | | | ------------+------+--------+------+------+------+------+--------------- August 5| 4·8 | 4200 | -800 | -300 | 3100 | 3·9 |10th August. „ 10| 5·4 | 5100 |-1020 | do | 3780 | 4·6 |15th „ „ 15| 5·8 | 5700 | do | do | 4380 | 5·0 |20th „ „ 20| 6·4 | 6500 | do | do | 5180 | 5·5 |25th „ „ 25| 6·1 | 5800 | do | do | 4480 | 5·1 |31st „ | | | | +------+------+--------------- „ 31| 6·2 | 6000 | do | do | 4680 | 5·2 | 5th September. ------------+------+--------+------+------+ | | September 5| 6·3 | 6200 | do | do | 4880 | 5·3 |10th „ „ 10| 6·1 | 5800 | do | +200 | 4980 | 5·5 |15th „ „ 15| 6·1 | 5700 | do | do | 4880 | 5·4 |20th „ „ 20| 6·0 | 5700 | do | do | 4880 | 5·4 |25th „ „ 25| 6·3 | 6200 | do | do | 5380 | 5·6 |30th „ | | | | +------+------+--------------- „ 30| 6·1 | 5800 | do | do | 4980 | 5·4 | 5th October. ------------+------+--------+------+------+ | | October 5| 5·6 | 5100 | do | do | 4280 | 5·0 |10th „ „ 10| 5·2 | 4500 | do | do | 3680 | 4·6 |15th „ „ 15| 4·9 | 4200 | -950 | do | 3450 | 4·4 |20th „ „ 20| 4·6 | 3800 | -900 | do | 3100 | 4·0 |25th „ „ 25| 4·5 | 3600 | -850 | do | 2950 | 3·9 |31st „ | | | | +------+------+--------------- „ 31| 4·0 | 3100 | -800 | do | 2500 | 3·5 | 5th November. ------------+------+--------+------+------+ | | November 5| 3·7 | 2800 | -700 | do | 2300 | 3·3 |10th „ ============+======+========+======+======+======+======+===============

TABLE LII.--_Calculated Cairo gauges corresponding to Assuân gauges if basin irrigation were to be changed into perennial irrigation._

1878 ============+======+========+======+======+======+======+=============== Date at |Gauges| Dis- |Water |Trough| Dis- |Gauges| Date at Assuân. | at | charges| con- | of |charge| at | Cairo. | As- | at | sump-| Nile | at |Cairo.| | suân.| Assuân.| tion |Assuân|Cairo.| | | | |Assuân| to | | | | | | to |Cairo.| | | | | |Cairo.| | | | ------------+------+--------+------+------+------+------+--------------- August 5| 5·6 | 5400 |-1020 | -800 | 3580 | 4·4 |10th August. „ 10| 5·3 | 6500 | do | do | 4680 | 5·2 |15th „ „ 15| 7·2 | 8200 | do | do | 6380 | 6·3 |20th „ „ 20| 7·5 | 8600 | do | do | 6780 | 6·5 |25th „ „ 25| 8·1 | 10000 | do | do | 8180 | 7·3 |31st „ | | | | +------+------+--------------- „ 31| 7·6 | 8800 | do | +800 | 8580 | 7·5 | 5th September. ------------+------+--------+------+------+ | | September 5| 8·1 | 10300 | do | -600 | 8580 | 7·5 |10th „ „ 10| 8·5 | 11500 | do | do | 9880 | 8·0 |15th „ „ 15| 8·9 | 12800 | do | do |11180 | 8·5 |20th „ „ 20| 8·9 | 12500 | do | do |10880 | 8·4 |25th „ „ 25| 9·0 | 12800 | do | do |11180 | 8·5 |30th „ | | | | +------+------+--------------- „ 30| 9·1 | 13200 | do | do |11580 | 8·6 | 5th October. ------------+------+--------+------+------+ | | October 5| 8·9 | 12100 | do | +400 |11480 | 8·6 |10th „ „ 10| 8·5 | 10900 | do | +800 |10680 | 8·4 |15th „ „ 15| 7·9 | 9300 | do | do | 9080 | 8·0 |20th „ „ 20| 7·6 | 8600 | do | do | 3380 | 7·4 |25th „ „ 25| 7·4 | 8200 | do | do | 7980 | 7·2 |31st „ | | | | +------+------+--------------- „ 31| 6·8 | 7000 | do | do | 6780 | 6·6 | 5th November. ------------+------+--------+------+------+ | | November 5| 6·3 | 6200 | do | do | 5980 | 6·1 |10th „ ============+======+========+======+======+======+======+===============

Appendix L

GAUGES OF THE NILE AND ITS TRIBUTARIES

TABLE LIII.--_Lake Victoria gauges at Jinja near the Ripon Falls._

=========+=================+=================+=================+ Months. | 1898 | 1899 | 1900 | +-----+-----+-----+-----+-----+-----+-----+-----+-----+ |Maxi-|Mini-|Mean.|Maxi-|Mini-|Mean.|Maxi-|Mini-|Mean.| | mum.| mum.| | mum.| mum.| | mum.| mum.| | ---------+-----+-----+-----+-----+-----+-----+-----+-----+-----+ January | .. | .. | .. | 0·95| 0·89| 0·90| 0·44| 0·34| 0·39| February | .. | .. | .. | 0·91| 0·84| 0·87| 0·43| 0·33| 0·39| March | .. | .. | .. | 0·89| 0·83| 0·85| 0·43| 0·33| 0·38| April | .. | .. | .. | 0·94| 0·83| 0·84| 0·48| 0·38| 0·42| May | .. | .. | 1·05| 1·05| 0·85| 0·94| 0·48| 0·42| 0·45| June | .. | .. | 0·96| 1·02| 0·86| 0·93| 0·47| 0·41| 0·45| July | .. | .. | 0·99| 0·91| 0·79| 0·86| 0·46| 0·44| 0·45| August | .. | .. | 0·96| 0·85| 0·56| 0·64| 0·46| 0·43| 0·45| September| 0·99| 0·93| 0·95| 0·56| 0·43| 0·48| 0·43| 0·30| 0·38| October | 0·98| 0·91| 0·95| 0·43| 0·33| 0·38| 0·30| 0·17| 0·24| November | 0·99| 0·91| 0·95| 0·36| 0·33| 0·35| 0·19| 0·11| 0·16| December | 0·99| 0·98| 0·95| 0·38| 0·33| 0·35| 0·38| 0·15| 0·26| ---------+-----+-----+-----+-----+-----+-----+-----+-----+-----+ Mean. | .. | .. | .. | .. | .. | 0·70| .. | .. | 0·37| =========+=====+=====+=====+=====+=====+=====+=====+=====+=====+

=========+=================+=================+=================+ Months. | 1901 | 1902 | 1903 | +-----+-----+-----+-----+-----+-----+-----+-----+-----+ |Maxi-|Mini-|Mean.|Maxi-|Mini-|Mean.|Maxi-|Mini-|Mean.| | mum.| mum.| | mum.| mum.| | mum.| mum.| | ---------+-----+-----+-----+-----+-----+-----+-----+-----+-----+ January | 0·41| 0·28| 0·35| 0·40| 0·34| 0·38| 0·57| 0·33| 0·42| February | 0·38| 0·30| 0·36| 0·43| 0·36| 0·39| 0·71| 0·62| 0·68| March | 0·58| 0·42| 0·48| 0·41| 0·34| 0·37| 0·77| 0·66| 0·71| April | 0·89| 0·46| 0·66| 0·44| 0·39| 0·43| 0·93| 0·72| 0·78| May | 0·95| 0·81| 0·89| 0·60| 0·44| 0·54| 1·10| 0·84| 1·00| June | 0·93| 0·74| 0·83| 0·55| 0·45| 0·50| 1·22| 1·07| 1·15| July | 0·76| 0·61| 0·68| 0·46| 0·41| 0·44| 1·37| 1·17| 1·24| August | 0·64| 0·46| 0·57| 0·45| 0·38| 0·42| 1·22| 1·00| 1·14| September| 0·51| 0·27| 0·39| 0·41| 0·37| 0·39| 1·03| 0·95| 0·98| October | 0·51| 0·33| 0·45| 0·40| 0·32| 0·35| 1·17| 0·99| 1·07| November | 0·36| 0·29| 0·33| 0·41| 0·33| 0·37| 1·27| 1·05| 1·16| December | 0·43| 0·34| 0·40| 0·43| 0·28| 0·36| 1·24| 1·12| 1·16| ---------+-----+-----+-----+-----+-----+-----+-----+-----+-----+ Mean. | .. | .. | 0·53| .. | .. | 0·41| .. | .. | 0·96| =========+=====+=====+=====+=====+=====+=====+=====+=====+=====+

=========+================= Months. | 1904 +-----+-----+----- |Maxi-|Mini-|Mean. | mum.| mum.| ---------+-----+-----+----- January | .. | .. | .. February | .. | .. | .. March | .. | .. | .. April | .. | .. | .. May | .. | .. | .. June | .. | .. | .. July | .. | .. | .. August | .. | .. | .. September| .. | .. | .. October | .. | .. | .. November | .. | .. | .. December | .. | .. | .. ---------+-----+-----+----- Mean. | .. | .. | .. =========+=====+=====+=====

TABLE LIV.--_Wadelai gauges._

=====+=====+====+====+====+====+====+====+====+====+====+====+====+==== Year.|Date.|Jan.|Feb.|Mar.|Apr.|May.|Jun.|Jul.|Aug.|Sep.|Oct.|Nov.|Dec. -----+-----+----+----+----+----+----+----+----+----+----+----+----+---- 1901 | 1 | ..| ..| ..| ..| ..| ..| ..| ..| ..| ..| ..|0·74 | 5 | ..| ..| ..| ..| ..| ..| ..| ..| ..| ..| ..|0·66 | 10 | ..| ..| ..| ..| ..| ..| ..| ..| ..| ..|0·69|0·66 | 15 | ..| ..| ..| ..| ..| ..| ..| ..| ..| ..|0·69|0·64 +-----+----+----+----+----+----+----+----+----+----+----+----+---- | 20 | ..| ..| ..| ..| ..| ..| ..| ..| ..| ..|0·67|0·62 | 25 | ..| ..| ..| ..| ..| ..| ..| ..| ..| ..|0·75|0·58 | 30 | ..| ..| ..| ..| ..| ..| ..| ..| ..| ..|0·74|0·58 +-----+----+----+----+----+----+----+----+----+----+----+----+---- |Mean | ..| ..| ..| ..| ..| ..| ..| ..| ..| ..|0·72|0·63 -----+-----+----+----+----+----+----+----+----+----+----+----+----+---- 1902 | 1 |0·58|0·30|0·25|0·13|0·10|0·15|0·10|0·20|0·29|0·33|0·71|0·86 | 5 |0·55|0·32|0·28|0·09|0·13|0·15|0·11|0·19|0·43|0·41|0·71|0·89 | 10 |0·53|0·27|0·25|0·09|0·14| ..|0·08|0·25|0·51|0·38|0·61|0·91 | 15 |0·43|0·22|0·18|0·08|0·16|0·10|0·18|0·18|0·33|0·52|0·81|0·86 +-----+----+----+----+----+----+----+----+----+----+----+----+---- | 20 |0·38|0·25|0·20|0·10|0·25|0·08|0·27|0·20|0·33|0·66|0·86|0·85 | 25 |0·36|0·28|0·20|0·11|0·23|0·13|0·20|0·33|0·30|0·51|0·75|0·82 | 30 |0·32| ..|0·13|0·10|0·18|0·10|0·19|0·28|0·33|0·65|0·86|0·76 +-----+----+----+----+----+----+----+----+----+----+----+----+---- |Mean |0·44|0·26|0·20|0·09|0·17|0·12|0·15|0·24|0·37|0·49|0·76|0·85 -----+-----+----+----+----+----+----+----+----+----+----+----+----+---- 1903 | 1 |0·76|0·69|0·58|0·53|0·53|0·56|1·02|1·07|1·07|1·60|1·70|1·93 | 5 |0·76|0·69|0·61|0·51|0·56|0·61|0·84|1·12|1·07|1·60|1·70|1·93 | 10 |0·76|0·67|0·57|0·53|0·56|0·76|0·89|1·07|1·12|1·60|1·83|1·93 | 15 |0·74|0·61|0·56|0·46|0·58|0·79|0·84|1·17|1·37|1·60|1·83|1·93 +-----+----+----+----+----+----+----+----+----+----+----+----+---- | 20 |0·74|0·63|0·55|0·51|0·66|0·79|0·89|1·14|1·45|1·57|1·88|1·93 | 25 |0·74|0·61|0·53|0·48|0·61|0·81|1·12|1·12|1·52|1·65|1·90|1·90 | 30 |0·76| ..|0·53|0·53|0·61|1·00|1·07|1·07|1·60|1·68|1·93|1·90 +-----+----+----+----+----+----+----+----+----+----+----+----+---- |Mean |0·75|0·64|0·56|0·50|0·59|0·77|0·95|1·12|1·32|1·63|1·84|1·92 -----+-----+----+----+----+----+----+----+----+----+----+----+----+---- 1904 | 1 |1·90|1·90|1·70|1·70| ..|1·74| ..| ..| ..| ..| ..| .. | 5 |1·90|1·90|1·73|1·70| ..| ..| ..| ..| ..| ..| ..| .. | 10 |1·90|1·87|1·69|1·70| ..| ..| ..| ..| ..| ..| ..| .. | 15 |1·90|1·78|1·68|1·71| ..| ..| ..| ..| ..| ..| ..| .. +-----+----+----+----+----+----+----+----+----+----+----+----+---- | 20 |1·90|1·73|1·68|1·71| ..| ..| ..| ..| ..| ..| ..| .. | 25 |1·90|1·74|1·68|1·74| ..| ..| ..| ..| ..| ..| ..| .. | 30 |1·90| ..|1·71|1·74| ..| ..| ..| ..| ..| ..| ..| .. +-----+----+----+----+----+----+----+----+----+----+----+----+---- |Mean |1·90|1·80|1·69|1·71| ..| ..| ..| ..| ..| ..| ..| .. =====+=====+====+====+====+====+====+====+====+====+====+====+====+====

TABLE LV.--_Gondokoro gauges._

1901 =====+======+=====+=====+=====+=====+=====+=====+=====+======= Date.|Month.|Date.| May.|June.|July.| Au- | Sep-|Date.|Month. | | | | | |gust.| tem-| | | | | | | | | ber.| | -----+------+-----+-----+-----+-----+-----+-----+-----+------ | Jan.| | | | | | | | Oct. 1 | ·22 | 1 | 0·34| 0·44| 0·33| 0·34| 0·63| 1 | 0·41 5 | ·20 | 2 | 0·34| 0·42| 0·33| 0·34| 0·63| 5 | 0·39 10 | ·18 | 3 | 0·38| 0·43| 0·32| 0·35| 0·64| 10 | 0·51 15 | ·17 | 4 | 0·40| 0·43| 0·33| 0·34| 0·63| 15 | 0·60 20 | ·12 | 5 | 0·71| 0·45| 0·33| 0·43| 0·63| 20 | 0·71 | +-----+-----+-----+-----+-----+-----+ | 25 | ·12 | 6 | 0·56| 0·43| 0·60| 0·54| 0·69| 25 | 0·67 30 | ·12 | 7 | 0·52| 0·41| 0·47| 0·44| 0·63| 30 | 0·69 +------+ | | | | | | +------ Mean | ·15 | 8 | 0·46| 0·41| 0·37| 0·47| 0·67|Mean | 0·60 -----+------| | | | | | +-----+------ | Feb.| 9 | 0·42| 0·41| 0·59| 0·64| 0·67| | Nov. 1 | ·12 | 10 | 0·42| 0·41| 0·39| 0·63| 0·67| 1 | 0·64 | +-----+-----+-----+-----+-----+-----+ | 5 | ·12 | 11 | 0·42| 0·41| 0·35| 0·62| 0·65| 5 | 0·67 10 | ·12 | 12 | 0·56| 0·41| 0·34| 0·46| 0·66| 10 | 0·64 15 | ·11 | 13 | 0·38| 0·40| 0·34| 0·41| 0·63| 15 | 0·49 20 | ·10 | 14 | 0·38| 0·40| 0·56| 0·48| 0·63| 20 | 0·57 25 | ·10 | 15 | 0·40| 0·40| 0·52| 0·46| 0·56| 25 | 0·59 | +-----+-----+-----+-----+-----+-----+ | 28 | ·09 | 16 | 0·36| 0·40| 0·56| 0·48| 0·47| 30 | 0·60 +------+ | | | | | | +------ Mean | ·11 | 17 | 0·34| 0·40| 0·61| 1·09| 0·43|Mean | 0·61 -----+------+ | | | | | +-----+------ | March| 18 | 0·36| 0·40| 0·43| 1·09| 0·41| | Dec. 1 | ·11 | 19 | 0·34| 0·40| 0·35| 0·62| 0·39| 1 | 0·61 5 | ·10 | 20 | 0·34| 0·40| 0·35| 0·46| 0·36| 5 | 0·59 | +-----+-----+-----+-----+-----+-----+ | 10 | ·10 | 21 | 0·36| 0·40| 0·36| 0·44| 0·43| 10 | 0·57 15 | ·12 | 22 | 0·46| 0·40| 0·34| 0·72| 0·45| 15 | 0·53 20 | ·26 | 23 | 0·40| 0·40| 0·34| 0·52| 0·49| 20 | 0·49 25 | ·22 | 24 | 0·40| 0·40| 0·35| 0·54| 0·45| 25 | 0·47 30 | ·27 | 25 | 0·42| 0·36| 0·34| 0·43| 0·45| 30 | 0·45 +------+-----+-----+-----+-----+-----+-----+ +------- Mean | ·18 | 26 | 0·52| 0·42| 0·36| 1·24| 0·43|Mean | 0·52 -----+------+ | | | | | +-----+------- | April| 27 | 0·42| 0·54| 0·35| 0·67| 0·41| | 1 | 0·08 | 28 | 0·46| 0·40| 0·35| 0·66| 0·39| | 5 | 0·08 | 29 | 0·46| 0·34| 0·35| 0·62| 0·41| | 10 | 0·14 | 30 | 0·46| 0·34| 0·35| | 0·41| | | +-----+-----+-----+-----+-----+-----+ | 15 | 0·32 | 31 | 0·46| .. | 0·35| .. | .. | | | +-----+-----+-----+-----+-----+-----+ | 20 | 0·44 |Mean | 0·43| 0·40| 0·40| 0·57| 0·53| | | +-----+-----+-----+-----+-----+-----+ | 25 | 0·42 | | | | | | | | 30 | 0·30 | | | | | | | | +------+ | | | | | | | Mean | 0·25 | | | | | | | | =====+======+=====+=====+=====+=====+=====+=====+=====+======= 1902 =====+======+=====+=====+=====+=====+=====+=====+=====+======= Date.|Month.|Date.| May.|June.|July.| Au- | Sep-|Date.| Month. | | | | | |gust.| tem-| | | | | | | | | ber.| | -----+------+-----+-----+-----+-----+-----+-----+-----+------- | Jan. | | | | | | | | Oct. 1 | 0·45 | 1 | 0·19| 0·06|-0·01| 0·44| 0·54| 1 | 0·48 5 | 0·43 | 2 | 0·20| 0·08| 0·02| 0·36| 0·52| 5 | 0·26 10 | 0·43 | 3 | 0·22| 0·14| 0·02| 0·44| 0·74| 10 | 0·54 15 | 0·47 | 4 | 0·26| 0·11| 0·04| 0·54| 1·04| 15 | 0·79 20 | 0·45 | 5 | 0·24| 0·09| 0·71| 0·49| 0·94| 20 | 0·80 | +-----+-----+-----+-----+-----+-----+ | 25 | 0·41 | 6 | 0·19| 0·09| 0·34| 0·42| 0·90| 25 | 0·76 30 | 0·41 | 7 | 0·19|-0·03| 0·08| 0·48| 1·24| 30 | 0·99 +------+ | | | | | | +------- Mean | 0·43 | 8 | 0·14| 0·04| 0·04| 1·54| 0·96|Mean | 0·71 -----+------+ | | | | | +-----+------- | Feb. | 9 | 0·16| 0·09| 0·04| 1·09| 0·84| | Nov. 1 | 0·39 | 10 | 0·18| 0·06|-0·01| 1·52| 1·04| 1 | 1·07 | +-----+-----+-----+-----+-----+-----+ | 5 | 0·36 | 11 | 0·34| 0·03|-0·01| 1·49| 0·99| 5 | 0·77 10 | 0·35 | 12 | 0·60| 0·07| 0·04| 1·44| 0·77| 10 | 0·84 15 | 0·33 | 13 | 0·48| 0·02| 0·04| 1·42| 0·74| 15 | -- 20 | 0·33 | 14 | 0·44|-0·01| 0·24| 1·46| 0·84| 20 | 1·23 25 | 0·36 | 15 | 0·51|-0·06| 0·04| 1·42| 0·96| 25 | 0·99 | +-----+-----+-----+-----+-----+-----+ | 28 | 0·40 | 16 | 0·45|-0·03| 0·02| 1·42| 1·28| 30 | 0·96 +------+ | | | | | | +------- Mean | 0·35 | 17 | 0·39|-0·01|-0·01| 1·44| 0·94|Mean | 1·00 -----+------+ | | | | | +-----+------- |March | 18 | 0·53|-0·08|-0·01| 1·38| 0·94| | Dec. 1 | 0·34 | 19 | 0·57|-0·06| 0·09| 1·32| 0·84| 1 | 0·94 5 | 0·36 | 20 | 0·64|-0·03| 0·12| 1·38| 0·89| 5 | 0·94 10 | 0·38 | 21 | 0·46|-0·06| 0·40| 1·46| 0·82| 10 | 0·92 15 | 0·46 | 22 | 0·39|-0·09| 0·87| 1·52| 0·76| 15 | 0·89 20 | 0·50 | 23 | 0·30|-0·14| 0·48| 1·62| 0·62| 20 | 0·85 25 | 0·34 | 24 | 0·27|+0·04| 0·30| 1·74| 0·64| 25 | 0·81 30 | 0·26 | 25 | 0·24| 0·01| 0·26| 1·52| 0·91| 30 | 0·74 +------+-----+-----+-----+-----+-----+-----+ +------- Mean | 0·40 | 26 | 0·19| 0·02| 0·24| 0·54| 0·66|Mean | 0·87 -----+------+ | | | | | +-----+------- |April | 27 | 0·16|-0·06| 0·22| 0·94| 0·62| | 1 | 0·14 | 28 | 0·14|-0·04| 0·22| 0·74| 0·54| | 5 | 0·13 | 29 | 0·11|-0·01| 0·46| 0·70| 0·54| | 10 | 0·04 | 30 | 0·07|-0·02| 0·54| .. | 0·57| | | +-----+-----+-----+-----+-----+-----+ | 15 |-0·01 | 31 | 0·04| .. | 0·58| 0·60| .. | | | +-----+-----+-----+-----+-----+-----+ | 20 | 0·19 |Mean | 0·30| 0·01| 0·19| 1·09| 0·82| | | +-----+-----+-----+-----+-----+-----+ | 25 | 0·05 | | | | | | | | 30 | 0·13 | | | | | | | | +------+ | | | | | | | Mean | 0·07 | | | | | | | | =====+======+=====+=====+=====+=====+=====+=====+=====+======= 1903 =====+======+=====+=====+=====+=====+=====+=====+=====+======= Date.|Month.|Date.| May.|June.|July.| Au- | Sep-|Date.| Month. | | | | | |gust.| tem-| | | | | | | | | ber.| | -----+------+-----+-----+-----+-----+-----+-----+-----+------- | Jan. | | | | | | | | Oct. 1 | 0·74 | 1 | 0·72| 1·15| 1·37| 1·55| 1·86| 1 | 2·18 5 | 0·71 | 2 | 1·70| 1·06| 1·38| 1·57| 1·82| 5 | 2·11 10 | 0·66 | 3 | 0·68| 1·06| 1·46| 1·65| 1·90| 10 | 2·12 15 | 0·63 | 4 | 0·68| 1·06| 1·43| 1·65| 2·54| 15 | 2·45 20 | 0·63 | 5 | 0·70| 1·00| 1·39| 1·72| 2·24| 20 | 2·06 | +-----+-----+-----+-----+-----+-----+ | 25 | 0·61 | 6 | 0·98| 1·10| 1·44| 1·61| 2·23| 25 | 2·20 30 | 0·63 | 7 | 0·92| 1·61| 1·46| 1·73| 2·71| 30 | 2·20 +------+ | | | | | | +------- Mean | 0·65 | 8 | 0·85| 1·36| 1·51| 2·16| 2·50|Mean | 2·16 -----+------+ | | | | | +-----+------- | Feb. | 9 | 0·89| 1·35| 1·49| 2·08| 2·33| | Nov. 1 | 0·62 | 10 | 1·06| 1·10| 1·46| 2·03| 2·29| 1 | 2·20 | +-----+-----+-----+-----+-----+-----+ | 5 | 0·61 | 11 | 0·80| 1·07| 1·41| 2·50| 2·24| 5 | 2·13 10 | 0·63 | 12 | 1·42| 1·06| 1·45| 2·03| 2·16| 10 | 2·05 15 | 0·58 | 13 | 1·48| 1·09| 1·56| 2·07| 2·09| 15 | 1·92 20 | 0·59 | 14 | 0·85| 1·08| 1·49| 1·86| 2·07| 20 | 1·91 25 | 0·56 | 15 | 0·85| 1·06| 1·35| 2·12| 2·20| 25 | 1·90 | +-----+-----+-----+-----+-----+-----+ | 28 | 0·53 | 16 | 0·89| 1·55| 1·40| 1·99| 2·23| 30 | 1·77 +------+ | | | | | | +------- Mean | 0·59 | 17 | 0·86| 1·47| 1·35| 1·90| 2·37|Mean | 1·96 -----+------+ | | | | | +-----+------- | March| 18 | 0·85| 1·44| 1·40| 1·93| 2·48| | Dec. 1 | 0·51 | 19 | 0·85| 1·40| 1·40| 1·86| 2·57| 1 | 1·77 5 | 0·51 | 20 | 0·86| 1·44| 1·40| 1·85| 2·70| 5 | 0·89 | +-----+-----+-----+-----+-----+-----+ | 10 | 0·51 | 21 | 0·86| 1·40| 1·41| 1·90| 2·76| 10 | 0·86 15 | 0·51 | 22 | 1·35| 1·52| 1·52| 1·95| 2·76| 15 | 0·81 20 | 0·52 | 23 | 1·52| 1·40| 1·61| 1·86| 2·96| 20 | 0·79 25 | 0·51 | 24 | 1·02| 1·40| 1·52| 1·82| 2·96| 25 | 0·79 30 | 0·50 | 25 | 1·00| 1·37| 1·55| 1·83| 2·58| 30 | 0·76 +------+-----+-----+-----+-----+-----+-----+ +------- Mean | 0·51 | 26 | 0·97| 1·27| 1·56| 2·20| 2·45|Mean | 0·88 -----+------+ | | | | | +-----+------- |April.| 27 | 1·03| 1·30| 1·67| 2·16| 2·33| | 1 | 0·50 | 28 | 1·00| 1·32| 1·61| 2·07| 2·23| | 5 | 0·48 | 29 | 0·90| 1·43| 1·65| 1·82| 2·20| | 10 | 0·48 | 30 | 0·89| 1·35| 1·63| 1·88| 2·18| | | +-----+-----+-----+-----+-----+-----+ | 15 | 0·55 | 31 | 0·91| .. | 1·52| 1·90| ..| | | +-----+-----+-----+-----+-----+-----+ | 20 | 0·57 |Mean | 0·95| 1·27| 1·48| 1·91| 2·36| | | +-----+-----+-----+-----+-----+-----+ | 25 | 0·57 | | | | | | | | 30 | 0·64 | | | | | | | | +------+ | | | | | | | Mean | 0·53 | | | | | | | | =====+======+=====+=====+=====+=====+=====+=====+=====+======= 1904 =====+======+=====+=====+===== Date.|Month.|Date.| May.|June. | | | | | | | | -----+------+-----+-----+----- 1 | 0·79 | 1 | 0·68| 0·90 5 | 0·78 | 2 | 0·68| 0·90 10 | 0·78 | 3 | 0·70| 0·90 15 | 0·76 | 4 | 0·70| 0·90 20 | 0·84 | 5 | 0·70| 0·90 | +-----+-----+----- 25 | 0·84 | 6 | 0·70| 0·88 30 | 0·82 | 7 | 0·68| 0·84 +------+ | | Mean.| 0·80 | 8 | 0·68| 0·80 -----+------+ | | | Feb. | 9 | 0·68| 0·76 1 | 0·82 | 10 | 0·68| 0·76 | +-----+-----+----- 5 | 0·80 | 11 | 0·78| 0·74 10 | 0·74 | 12 | 0·78| 0·72 15 | 0·72 | 13 | 0·84| 0·74 20 | 0·70 | 14 | 0·84| 0·72 25 | 0·68 | 15 | 0·80| 0·72 | +-----+-----+----- 28 | 0·74 | 16 | 0·80| 0·70 +------+ | | Mean.| 0·73 | 17 | 0·76| 0·70 -----+------+ | | |March | 18 | 0·78| 0·70 1 | 0·68 | 19 | 0·80| 0·74 5 | 0·70 | 20 | 0·80| 0·82 | +-----+-----+----- 10 | 0·66 | 21 | 0·84| 0·70 15 | 0·66 | 22 | 0·88| 0·70 20 | 0·66 | 23 | 0·88| 0·74 25 | 0·84 | 24 | 0·88| 0·78 30 | 0·90 | 25 | 1·00| 0·74 +------+-----+-----+----- Mean.| 0·71 | 26 | 0·88| 0·88 -----+------+ | | |April.| 27 | 0·84| 0·78 1 | 0·74 | 28 | 0·84| 0·84 5 | 0·72 | 29 | 0·84| 0·82 10 | 0·72 | 30 | 0·90| 0·88 | +-----+-----+----- 15 | 0·80 | 31 | .. | .. | +-----+-----+----- 20 | 0·84 |Mean.| 0·79| 0·79 25 | 0·74 +-----+-----+----- 30 | .. | | | +------+ | | Mean.| 0·77 | | | =====+======+=====+=====+=====

TABLE LVI.--_Mongalla gauges._

1903 =====+======+=====+=====+=====+=====+=====+=====+=====+======== Date.|Month.|Date.| May.|June.|July.| Au- | Sep-|Date.| Month. | | | | | |gust.| tem-| | | | | | | | | ber.| | -----+------+-----+-----+-----+-----+-----+-----+-----+-------- |Janu- | | | | | | | |October. 1 |ary. | 1 | | 1·65| 1·93| 2·19| 2·52| 1 | 2·83 5 | | 2 | | 1·47| 1·89| 2·50| 2·45| 5 | 2·83 10 | | 3 | | 1·47| 1·79| 2·34| 2·58| 10 | 2·81 15 | | 4 | | 1·51| 1·86| 2·30| 2·73| 15 | 2·91 20 | | 5 | | 1·75| 1·91| 2·28| 2·85| 20 | 2·80 | | +-----+-----+-----+-----+-----+ | 25 | | 6 | | 1·96| 1·86| 2·21| 2·90| 25 | 2·80 30 | | 7 | | 1·75| 1·82| 2·14| 3·02| 30 | 2·87 +------+ | | | | | | +-------- Mean.| | 8 | | 1·91| 1·75| 2·12| 3·16|Mean.| 2·83 -----+------+ | | | | | +-----+-------- |Febru-| 9 | | 1·89| 1·84| 2·59| 3·14|Nov. | 1 |ary. | 10 | | 1·89| 1·84| 2·63| 3·08| 1 | 2·84 | +-----+-----+-----+-----+-----+-----+ | 5 | | 11 | | 1·58| 1·82| 2·73| 2·90| 5 | 2·81 10 | | 12 | | 1·58| 1·75| 2·73| 2·84| 10 | 2·81 15 | | 13 | | 1·61| 1·75| 2·68| 2·82| 15 | 2·79 20 | | 14 | | 1·61| 1·93| 2·66| 2·82| 20 | 2·66 25 | | 15 | | 1·98| 1·86| 2·63| 2·82| 25 | 2·35 | +-----+-----+-----+-----+-----+-----+ | 28 | | 16 | | 1·98| 1·86| 2·52| 2·84| 30 | 2·27 +------+ | | | | | | +-------- Mean.| | 17 | | 2·10| 1·89| 2·56| 2·92|Mean.| 2·64 -----+------+ | | | | | +-----+-------- |March.| 18 | | 2·10| 1·82| 2·56| 3·06|Dec. | 1 | | 19 | | 2·10| 1·96| 2·63| 3·12| 1 | 2·26 5 | | 20 | | 1·82| 1·93| 2·63| 3·18| 5 | 2·21 | +-----+-----+-----+-----+-----+-----+ | 10 | | 21 | | 1·95| 2·00| 2·59| 3·30| 10 | 2·17 15 | | 22 | | 1·89| 2·00| 2·65| 3·40| 15 | 2·14 20 | | 23 | | 1·86| 2·05| 2·66| 3·52| 20 | 2·10 25 | | 24 | | 1·82| 2·05| 2·63| 3·54| 25 | 2·03 30 | | 25 | | 1·75| 2·07| 2·61| 3·42| 30 | 2·02 +------+-----+-----+-----+-----+-----+-----+ +-------- Mean.| | 26 | | 1·72| 2·07| 2·49| 3·32|Mean.| 2·13 -----+------+ | | | | | +-----+-------- |April.| | | | | | | | 1 | 0·83 | 27 | | 1·75| 2·12| 2·52| 3·18| | 5 | 0·87 | 28 | | 1·68| 2·13| 2·52| 3·05| | 10 | 0·90 | 29 | | 1·89| 2·16| .. | 3·00| | 15 | 0·89 | 30 | | 1·93| 2·21| .. | 2·92| | | +-----+-----+-----+-----+-----+-----+ | 20 | 0·96 | 31 | | .. | 2·21| | | | | +-----+-----+-----+-----+-----+-----+ | 25 | 1·14 |Mean.| | 1·82| 1·96| 2·49| 2·97| | | +-----+-----+-----+-----+-----+-----+ | 30 | 0·99 | | | | | | | | +------+ | | | | | | | Mean.| 0·92 | | | | | | | | =====+======+=====+=====+=====+=====+=====+=====+=====+======== 1904 =====+======+=====+=====+=====+=====+=====+=====+=====+======== Date.|Month.|Date.| May.|June.|July.| Au- | Sep-|Date.| Month. | | | | | |gust.| tem-| | | | | | | | | ber.| | -----+------+-----+-----+-----+-----+-----+-----+-----+-------- | Janu-| | | | | | | |Octo- | ary.| | | | | | | |ber. 1 | 2·03 | 1 | 1·91| 2·17| | | | | 5 | 2·00 | 2 | 1·89| 2·24| | | | | 10 | 1·98 | 3 | 1·89| 2·17| | | | | 15 | 1·97 | 4 | 1·89| 2·21| | | | | 20 | 1·96 | 5 | 1·89| 2·17| | | | | | +-----+-----+-----+-----+-----+-----+ | 25 | 1·92 | 6 | 1·96| 2·17| | | | | 30 | 1·91 | 7 | 1·89| 2·14| | | | | +------+ | | | | | | | Mean.| 1·97 | 8 | 1·89| 2·10| | | | | -----+------+ | | | | | | | |Febru-| | | | | | | | | ary. | 9 | 1·89| 2·07| | | | | 1 | 1·91 | 10 | 1·89| 2·03| | | | | | +-----+-----+-----+-----+-----+-----+ | 5 | 1·89 | 11 | 1·96| 2·00| | | | | 10 | 1·86 | 12 | 2·03| 2·00| | | | | 15 | 1·82 | 13 | 2·10| 2·00| | | | | 20 | 1·82 | 14 | 2·03| 2·00| | | | | 25 | 1·82 | 15 | 2·07| 2·00| | | | | | +-----+-----+-----+-----+-----+-----+ | 28 | 1·82 | 16 | 2·03| 1·96| | | | | +------+ | | | | | | | Mean.| 1·85 | 17 | 2·03| 1·96| | | | | -----+------+ | | | | | | | |March.| 18 | 2·03| 1·96| | | | | 1 | 1·82 | 19 | 2·03| 2·10| | | | | 5 | 1·81 | 20 | 2·07| 2·03| | | | | | +-----+-----+-----+-----+-----+-----+ | 10 | 1·79 | 21 | 2·07| 2·00| | | | | 15 | 1·82 | 22 | 2·17| 1·98| | | | | 20 | 1·77 | 23 | 2·17| 1·98| | | | | 25 | 1·79 | 24 | 2·17| 2·00| | | | | 30 | 1·96 | 25 | 2·21| 2·07| | | | | +------+-----+-----+-----+-----+-----+-----+ | Mean.| 1·82 | 26 | 2·21| 2·07| | | | | -----+------+ | | | | | | | |April.| | | | | | | | 1 | 1·93 | 27 | 2·17| 2·10| | | | | 5 | 1·82 | 28 | 2·14| 2·10| | | | | 10 | 1·82 | 29 | 2·12| 2·07| | | | | 15 | 1·93 | 30 | 2·10| 2·03| | | | | 20 | 2·07 +-----+-----+-----+-----+-----+-----+ | 25 | 1·96 | 31 | 2·21| | | | | | | | | | | | | | | 30 | 1·89 |Mean.| 2·03| 2·07| | | | | +------+ +-----+-----+-----+-----+-----+ | Mean.| 1·91 | | | | | | | | =====+======+=====+=====+=====+=====+=====+=====+=====+========

TABLE LVII.--_Sobat River gauges at Nasser._

TABLE LVIII.--_Sobat River gauges at Dulaib Hilla._

=====+=====+====+====+====+====+=====+===+====+====+====+====+====+==== Year.|Date.|Jan.|Feb.|Mar.|Apr.|May.|Jun.|Jul.|Aug.|Sep.|Oct.|Nov.|Dec. -----+-----+----+----+----+----+----+----+----+----+----+----+----+---- 1903 | 1 | .. | .. | .. | .. |0·00|1·11|1·71|2·30|2·80|3·26|3·48|3·52 | 5 | .. | .. | .. | .. |0·09|1·22|1·80|2·39|2·86|3·27|3·48|3·52 | 10 | .. | .. | .. | .. |0·28|1·36|1·87|2·45|2·93|3·36|3·49|3·53 | 15 | .. | .. | .. | .. |0·40|1·53|1·95|2·52|3·05|3·42|3·49|3·54 +-----+----+----+----+----+----+----+----+----+----+----+----+---- | 20 | .. | .. | .. | .. |0·62|1·56|2·08|2·57|3·11|3·44|3·50|3·53 | 25 | .. | .. | .. | .. |0·81|1·65|2·18|2·70|3·16|3·45|3·50|3·51 | 30 | .. | .. | .. | .. |1·00|1·70|2·28|2·74|3·26|3·47|3·51|3·45 +-----+----+----+----+----+----+----+----+----+----+----+----+---- | Mean| .. | .. | .. | .. |0·47|1·46|1·99|2·54|3·03|3·40|3·49|3·51 -----+-----+----+----+----+----+----+----+----+----+----+----+----+---- 1904 | 1 |3·42|1·92|0·93|0·88|0·81|1·56|2·00| .. | .. | .. | .. | .. | 5 |3·36|1·65|0·87|0·88|0·73|1·65| .. | .. | .. | .. | .. | .. | 10 |3·19|1·42|0·88|0·86|0·86|1·67| .. | .. | .. | .. | .. | .. | 15 |3·04|1·24|0·91|0·78|0·99|1·72| .. | .. | .. | .. | .. | .. +-----+----+----+----+----+----+----+----+----+----+----+----+---- | 20 |2·74|1·12|0·97|0·81|1·21|1·83| .. | .. | .. | .. | .. | .. | 25 |2·36|1·00|1·00|0·90|1·39|1·90| .. | .. | .. | .. | .. | .. | 30 |2·01| .. |0·91|0·84|1·49|1·98| .. | .. | .. | .. | .. | .. +-----+----+----+----+----+----+----+----+----+----+----+----+---- | Mean|2·77|1·30|0·92|0·85|1·08|1·76| .. | .. | .. | .. | .. | .. =====+=====+====+====+====+====+====+====+====+====+====+====+====+====

TABLE LIX.-- _White Nile gauges at Tewfikieh._

=====+=====+====+====+====+====+=====+===+====+====+====+====+====+==== Year.|Date.|Jan.|Feb.|Mar.|Apr.|May.|Jun.|Jul.|Aug.|Sep.|Oct.|Nov.|Dec. -----+-----+----+----+----+----+----+----+----+----+----+----+----+---- 1903 | 1 | .. | .. | .. | .. |0·24|1·19|1·71|2·11|2·76|3·47|3·53|3·56 | 5 | .. | .. | .. | .. |0·24|1·30|1·78|2·15|2·86|3·55|3·54|3·58 | 10 | .. | .. | .. | .. |0·34|1·42|1·88| .. |3·07|3·39|3·54|3·58 | 15 | .. | .. | .. | .. |0·53|1·51|1·89| .. |3·20|3·41|3·55|3·59 +-----+----+----+----+----+----+----+----+----+----+----+----+---- | 20 | .. | .. | .. |0·22|0·74|1·58|2·01| .. |3·26|3·46|3·56|3·59 | 25 | .. | .. | .. |0·24| .. |1·61|2·09| .. |3·37|3·50|3·55|3·58 | 30 | .. | .. | .. |0·24| .. |1·69|2·16| .. |3·46|3·52|3·56|3·57 +-----+----+----+----+----+----+----+----+----+----+----+----+---- | Mean| .. | .. | .. | .. | .. |1·48|1·94| .. |3·15|3·44|3·55|3·58 -----+-----+----+----+----+----+----+----+----+----+----+----+----+---- 1904 | 1 |3·57|2·07|0·97|0·91|0·84|1·56| .. | .. | .. | .. | .. | .. | 5 |3·54|1·76|0·91|0·91|0·74|1·67| .. | .. | .. | .. | .. | .. | 10 |3·48|1·48|0·92|0·89|0·86|1·69| .. | .. | .. | .. | .. | .. | 15 |3·36|1·25|0·94|0·81|1·02|1·74| .. |2·79| .. | .. | .. | .. +-----+----+----+----+----+----+----+----+----+----+----+----+---- | 20 |3·10|1·09|1·00|0·84|1·25|1·87| .. |2·87| .. | .. | .. | .. | 25 |2·69|1·07|1·03|0·93|1·43|1·94| .. |2·92| .. | .. | .. | .. | 30 |2·23| .. |0·97|0·84|1·53|2·02| .. |2·98| .. | .. | .. | .. +-----+----+----+----+----+----+----+----+----+----+----+----+---- | Mean|3·16|1·37|0·96|0·88|1·11|1·79| .. | .. | .. | .. | .. | .. =====+=====+=========+====+====+====+====+====+====+====+====+====+====

TABLE LX.--_Duem gauges._

=====+=====+====+====+====+====+====+====+====+====+====+====+====+==== Year.|Date.|Jan.|Feb.|Mar.|Apr.|May.|Jun.|Jul.|Aug.|Sep.|Oct.|Nov.|Dec. -----+-----+----+----+----+----+----+----+----+----+----+----+----+---- 1901 | 1 | .. |0·91|0·66|0·43|0·61|0·59|1·43|2·88|4·10|3·40|2·40|2·12 | 5 | .. |0·90|0·66|0·40|0·64|0·66|1·44|3·18|4·28|3·36|2·35|2·10 | 10 | .. |0·88|0·60|0·46|0·62|0·77|1·54|3·38|4·16|2·90|2·33|2·00 | 15 | .. |0·85|0·51|0·27|0·51|0·91|1·78|3·80|4·22|2·70|2·28|1·86 +-----+----+----+----+----+----+----+----+----+----+----+----+---- | 20 | .. |0·80|0·47|0·36|0·52|1·08|1·96|4·12|4·08|2·85|2·30|1·80 | 25 | .. |0·75|0·45|0·46|0·52|1·22|1·98|4·12|3·70|2·38|2·30|1·64 | 30 | .. |0·68|0·45|0·58|0·51|1·32|2·48|4·04|3·46|2·42|2·14|1·46 +-----+----+----+----+----+----+----+----+----+----+----+----+---- |Mean | .. |0·82|0·54|0·42|0·56|0·94|1·80|3·65|4·00|2·84|2·30|1·85 -----+-----+----+----+----+----+----+----+----+----+----+----+----+---- 1902 | 1 |1·38|0·78|0·60|0·59|0·56|0·77|1·28|2·12|3·52|3·50|2·36| .. | 5 |1·24|0·74|0·58|0·62|0·52|0·81|1·40|2·20|3·49|3·48|2·26| .. | 10 |1·16|0·73|0·51|0·58|0·49|0·95|1·48|2·55|3·62|3·36|2·20| .. | 15 |1·07|0·66|0·54|0·58|0·54|1·04|1·60|2·82|3·72|3·00|2·14|2·02 +-----+----+----+----+----+----+----+----+----+----+----+----+---- | 20 |0·95|0·60|0·60|0·55|0·59|1·08|1·72|2·91|3·72|2·68|2·11|1·99 | 25 |0·90|0·60|0·66|0·61|0·66|1·14|1·89|3·17|3·58|2·57|2·00|2·01 | 30 |0·80|0·60|0·62|0·57|0·74|1·24|2·10|3·52|3·51|2·45|2·00|1·98 +-----+----+----+----+----+----+----+----+----+----+----+----+---- |Mean |1·07|0·67|0·59|0·58|0·58|1·00|1·64|2·75|3·60|3·00|2·15| .. -----+-----+----+-+--+----+----+----+----+----+----+----+----+----+---- 1903 | 1 |1·90|1·04|0·72|0·41|0·38|0·74|1·31|1·27|4·33|4·18|3·13|2·34 | 5 |1·90|1·02|0·71|0·40|0·34|0·82|1·34|2·62|4·30|4·01|3·02|2·16 | 10 |1·75|0·99|0·64|0·42|0·33|0·98|1·54|3·18|4·48|3·82|2·82|1·96 | 15 |1·45|0·89|0·55|0·41|0·36|1·07|1·74|3·70|4·38|3·62|2·66|1·92 +-----+----+----+----+----+----+----+----+----+----+----+----+---- | 20 |1·39|0·88|0·48|0·38|0·41|1·20|1·80|3·84|4·18|3·36|2·56|1·84 | 25 |1·20|0·80|0·47|0·37|0·52|1·28|2·03|4·12|4·28|3·40|2·42|1·76 | 30 |1·06|0·77|0·42|0·37|0·61|1·33|2·24|4·22|4·22|3·41|2·36|1·70 +-----+----+----+----+----+----+----+----+----+----+----+----+---- |Mean |1·52|0·90|0·57|0·40|0·42|1·06|1·70|3·42|4·30|3·70|2·70|1·95 -----+-----+----+----+----+----+----+----+----+----+----+----+----+---- 1904 | 1 |1·70|1·38|0·88|0·26|0·19|0·24|0·50|2·00|2·64| .. | .. | .. | 5 |1·66|1·32|0·66|0·30|0·18|0·30|0·51|2·90|2·80| .. | .. | .. | 10 |1·62|1·28|0·50|0·28|0·16|0·40|0·70|3·40|3·00| .. | .. | .. | 15 |1·60|1·20|0·35|0·25|0·15|0·41|0·95|3·15| .. | .. | .. | .. +-----+----+----+----+----+----+----+----+----+----+----+----+---- | 20 |1·54|1·14|0·30|0·22|0·14|0·48|1·30|2·70| .. | .. | .. | .. | 25 |1·46|1·00|0·28|0·21|0·22|0·49|1·55|2·45| .. | .. | .. | .. | 30 |1·40|0·94|0·26|0·19|0·24|0·50|1·90|2·64| .. | .. | .. | .. +-----+----+----+----+----+----+----+----+----+----+----+----+---- |Mean |1·57|1·18|0·46|0·24|0·18|0·40|1·06|2·75| .. | .. | .. | .. =====+=====+====+====+====+====+====+====+====+====+====+====+====+====

TABLE LXI.--_Wad Medani gauges._

1901 =====+=========+=====+=====+=====+=====+=====+=====+=====+======== Date.| Month. |Date.| May.|June.|July.| Au- |Sept.|Date.| Month. | | | | | |gust.| | | -----+---------+-----+-----+-----+-----+-----+-----+-----+-------- | January | .. | .. | .. | .. | .. | .. | |October. | | .. | .. | .. | .. | .. | .. | 1 | .. | | .. | .. | .. | .. | .. | .. | 5 | .. | | .. | .. | .. | .. | .. | .. | 10 | .. | | .. | .. | .. | .. | .. | .. | 15 | .. | | .. | .. | .. | .. | .. | .. | 20 | .. | | .. | .. | .. | .. | .. | .. | 25 | .. | | .. | .. | .. | .. | .. | .. | 30 | .. | | | | | | | | +-------- | | .. | .. | .. | .. | .. | .. |Mean.| | | | | | | | +-----+-------- |February | .. | .. | .. | .. | .. | .. | |Novemb. | | .. | .. | .. | .. | .. | .. | 1 | 4·49 | | .. | .. | .. | .. | .. | .. | 5 | 4·19 | | .. | .. | .. | .. | .. | .. | 10 | 3·85 | | .. | .. | .. | .. | .. | .. | 15 | 3·53 | | .. | .. | .. | .. | .. | .. | 20 | 3·25 | | .. | .. | .. | .. | .. | .. | 25 | 3·07 | | .. | .. | .. | .. | .. | .. | 30 | 3·01 | | | | | | | | +-------- | | .. | .. | .. | .. | .. | .. |Mean.| 3·58 | | | | | | | +-----+-------- | March | .. | .. | .. | .. | .. | .. | |Decemb. | | .. | .. | .. | .. | .. | .. | 1 | 2·89 | | .. | .. | .. | .. | .. | .. | 5 | 2·67 | | .. | .. | .. | .. | .. | .. | 10 | 2·47 | | .. | .. | .. | .. | .. | .. | 15 | 2·33 | | .. | .. | .. | .. | .. | .. | 20 | 2·19 | | .. | .. | .. | .. | .. | .. | 25 | 2·05 | | .. | .. | .. | .. | .. | .. | 30 | 1·91 | | | | | | | | +-------- | | .. | .. | .. | .. | .. | .. |Mean.| 2·33 | | | | | | | +-----+-------- | April | .. | .. | .. | .. | .. | .. | | =====+=========+=====+=====+=====+=====+=====+=====+=====+======== 1902 =====+=========+=====+=====+=====+=====+=====+=====+=====+======== Date.| Month. |Date.| May.|June.|July.| Au- |Sept.|Date.| Month. | | | | | |gust.| | | -----+---------+-----+-----+-----+-----+-----+-----+-----+-------- |January. | | | | | | | |October. 1 | 1·89 | 1 | 0·39| 1·59| 3·80| 7·56| 9·62| 1 | 9·94 5 | 1·81 | 2 | 0·33| 2·11| 3·80| 7·86|10·12| 5 | 9·30 10 | 1·69 | 3 | 0·33| 2·11| 3·70| 7·94|10·42| 10 | 8·00 15 | 1·61 | 4 | 0·37| 2·07| 3·80| 8·32|10·32| 15 | 7·38 20 | 1·55 | 5 | 0·39| 2·03| 4·16| 8·42|10·30| 20 | 7·08 | +-----+-----+-----+-----+-----+-----+ | 25 | 1·49 | 6 | 0·41| 1·97| 4·46| 8·56|10·10| 25 | 6·68 30 | 1·39 | 7 | 0·39| 1·91| 4·68| 8·76|10·40| 30 | 6·14 +---------+ | | | | | | +-------- Mean.| 1·62 | 8 | 0·39| 1·97| 4·64| 8·86|10·50|Mean.| 7·65 -----+---------+ | | | | | +-----+-------- |February.| 9 | 0·37| 2·25| 4·56| 9·00|10·40| | Nov. 1 | 1·37 | 10 | 0·35| 2·15| 4·38| 9·10|10·40| 1 | 5·90 | +-----+-----+-----+-----+-----+-----+ | 5 | 1·31 | 11 | 0·41| 2·00| 4·48| 9·14|10·28| 5 | 5·66 10 | 1·21 | 12 | 0·48| 1·77| 4·28| 9·16|10·60| 10 | 5·24 15 | 1·13 | 13 | 0·51| 1·67| 4·56| 9·14|10·70| 15 | 4·94 20 | 1·07 | 14 | 0·61| 1·61| 4·70| 9·02|10·48| 20 | 4·74 25 | 1·03 | 15 | 0·77| 1·65| 4·86| 8·96|10·28| 25 | 4·60 | +-----+-----+-----+-----+-----+-----+ | 28 | 0·99 | 16 | 0·89| 1·99| 4·80| 8·66|10·32| 30 | 4·28 +---------+ | | | | | | +-------- Mean.| 1·15 | 17 | 0·87| 2·57| 5·10| 8·66|10·32|Mean.| 5·02 -----+---------+ | | | | | +-----+-------- |March. | 18 | 1·01| 2·97| 5·20| 8·96|10·00| | Dec. 1 | 0·98 | 19 | 0·95| 3·27| 5·40| 9·48|10·30| 1 | -- 5 | 0·91 | 20 | 0·93| 3·39| 5·48|10·08|10·26| 5 | 4·00 | +-----+-----+-----+-----+-----+-----+ | 10 | 0·79 | 21 | 0·71| 3·39| 5·42|10·00|10·00| 10 | 3·73 15 | 0·87 | 22 | 0·61| 3·19| 5·66| 9·66| 9·80| 15 | 3·54 20 | 1·01 | 23 | 0·65| 3·04| 5·70| 9·46| 9·80| 20 | 3·40 25 | 0·84 | 24 | 0·61| 2·94| 5·66| 9·52|10·00| 25 | 3·18 30 | 0·67 | 25 | 0·57| 3·04| 5·76| 9·92|10·10| 30 | 2·94 +---------+-----+-----+-----+-----+-----+-----+ +-------- Mean.| 0·87 | 26 | 0·61| 3·89| 5·74|10·26| 9·90|Mean.| 3·51 -----+---------+ | | | | | +-----+-------- |April. | | | | | | | | 1 | 0·63 | 27 | 0·65| 4·29| 5·72|10·46| 9·95| | 5 | 0·55 | 28 | 0·71| 4·24| 6·36|10·52|10·00| | 10 | 0·43 | 29 | 0·91| 4·24| 6·79|10·32|10·26| | 15 | 0·43 | 30 | 0·11| 4·28| 7·06|10·02|10·26| | | +-----+-----+-----+-----+-----+-----+ | 20 | 0·51 | 31 | 0·21| | 7·28| 9·72| | | | +-----+-----+-----+-----+-----+-----+ | 25 | 0·57 |Mean.| 0·56| 2·65| 5·09| 9·21|10·20| | | +-----+-----+-----+-----+-----+-----+ | 30 | 0·41 | | | | | | | | +---------+ | | | | | | | Mean.| 0·50 | | | | | | | | =====+=========+=====+=====+=====+=====+=====+=====+=====+======== 1903 =====+=========+=====+=====+=====+=====+=====+=====+=====+======== Date.| Month. |Date.| May.|June.|July.| Au- |Sept.|Date.| Month. | | | | | |gust.| | | -----+---------+-----+-----+-----+-----+-----+-----+-----+-------- | | | | | | | | | |January. | | | | | | | |October. 1 | 2·88 | 1 | 0·96| 3·15| 4·71| 7·75|11·02| 1 | 9·48 5 | 2·70 | 2 | 0·96| 3·25| 5·27| 9·11|10·68| 5 | 8·84 10 | 2·56 | 3 | 0·94| 3·85| 5·61| 9·81|10·44| 10 | 8·42 15 | 2·46 | 4 | 0·92| 4·05| 5·81|10·11|10·40| 15 | 7·94 20 | 2·36 | 5 | 0·90| 3·61| 5·85|10·11|10·50| 20 | 8·84 | +-----+-----+-----+-----+-----+-----+ | 25 | 2·26 | 6 | 0·88| 3·65| 6·10|10·07|10·64| 25 | 8·25 30 | 2·16 | 7 | 0·88| 3·49| 6·23|10·21|10·56| 30 | 7·33 +---------+ | | | | | | +-------- Mean.| 2·42 | 8 | 0·90| 3·41| 6·45|10·15|10·50|Mean.| 8·41 -----+---------+ | | | | | |-----+-------- |February.| 9 | 0·86| 3·63| 6·55| 9·99|10·74| | Nov. 1 | 2·12 | 10 | 0·82| 3·79| 6·57| 9·89|10·52| 1 | 7·19 | +-----+-----+-----+-----+-----+-----+ | 5 | 2·04 | 11 | 0·84| 3·90| 6·81|10·19|10·46| 5 | 6·68 10 | 2·00 | 12 | 0·86| 4·20| 7·03|10·59|10·40| 10 | 6·12 15 | 1·90 | 13 | 0·88| 4·30| 7·13|10·71|10·06| 15 | 5·70 20 | 1·84 | 14 | 0·92| 4·42| 6·77|10·57| 9·96| 20 | 5·55 25 | 1·72 | 15 | 0·98| 4·64| 6·74|10·32| 9·92| 25 | 5·14 | +-----+-----+-----+-----+-----+-----+ | 28 | 1·70 | 16 | 1·02| 4·82| 6·57|10·49| 9·94| 30 | 4·96 +---------+ | | | | | | +-------- Mean.| 1·91 | 17 | 1·06| 4·70| 6·91|10·41| 9·92|Mean.| 5·83 -----+---------+ | | | | | |-----+-------- |March. | 18 | 1·14| 4·62| 7·05|10·49| 9·96| | Dec. 1 | 1·68 | 19 | 1·26| 4·52| 7·05|10·49|10·12| 1 | 4·92 5 | 1·60 | 20 | 1·40| 4·32| 7·39|10·73|10·32| 5 | 4·80 | +-----+-----+-----+-----+-----+-----+ | 10 | 1·52 | 21 | 1·66| 4·30| 8·01|10·71|10·42| 10 | 4·54 15 | 1·44 | 22 | 1·76| 4·28| 7·97|10·71|10·56| 15 | 4·40 20 | 1·34 | 23 | 1·92| 4·28| 7·81|10·47|10·52| 20 | 4·10 25 | 1·32 | 24 | 2·06| 4·25| 7·87|10·39|10·46| 25 | 3·84 30 | 1·30 | 25 | 2·20| 4·51| 7·75|10·39|10·32| 30 | 3·60 +---------+-----+-----+-----+-----+-----+-----+ +-------- Mean.| 1·44 | 26 | 2·74| 4·31| 7·77|10·47|10·18|Mean.| 4·28 -----+---------+ | | | | | |-----+-------- |April. | 27 | 1·51| 4·21| 7·80|10·41| 9·72| | 1 | 1·24 | 28 | 3·43| 4·17| 7·73|10·61| 9·42| | 5 | 1·10 | 29 | 3·39| 4·13| 7·77|10·67| 9·24| | 10 | 1·10 | 30 | 3·34| 4·41| 7·67|10·80| 9·22| | | +-----+-----+-----+-----+-----+-----+ | 15 | 1·08 | 31 | 3·25| | 7·70|10·92| | | | +-----+-----+-----+-----+-----+-----+ | 20 | 1·04 |Mean.| 1·50| 4·10| 6·92|10·28|10·23| | | +-----+-----+-----+-----+-----+-----+ | 25 | 0·98 | | | | | | | | 30 | 0·98 | | | | | | | | +---------+ | | | | | | | Mean.| 1·06 | | | | | | | | =====+=========+=====+=====+=====+=====+=====+=====+=====+======== 1904 =====+=========+=====+=====+=====+=====+=====+=====+=====+======== Date.| Month. |Date.| May.|June.|July.| Au- |Sept.| | | | | | | |gust.| | | -----+---------+-----+-----+-----+-----+-----+-----+-----+-------- |January. | | | | | | | | 1 | 3·64 | 1 | 1·50| 2·36| 4·24| 9·60| 9·50| | 5 | 3·56 | 2 | 1·48| 2·50| 4·58|10·30| 9·58| | 10 | 3·48 | 3 | 1·66| 2·88| 4·82|10·10| 9·50| | 15 | 3·36 | 4 | 1·66| 3·32| 5·22| 9·90| 9·50| | 20 | 3·15 | 5 | 1·64| 3·40| 5·52| 9·70| 9·40| | | +-----+-----+-----+-----+-----+-----+ | 25 | 3·08 | 6 | 1·64| 3·28| 5·52| 9·60| 9·30| | 30 | 2·80 | 7 | 1·62| 3·24| 5·22| 9·40| 9·30| | +---------+ | | | | | | | Mean.| 3·28 | 8 | 1·64| 3·08| 4·92| 9·50| 9·20| | -----+---------+ | | | | | | | |February.| 9 | 1·56| 2·98| 4·82| 9·50| 9·20| | 1 | 2·76 | 10 | 1·62| 3·00| 4·96| 9·40| 9·29| | | +-----+-----+-----+-----+-----+-----+ | 5 | 2·58 | 11 | 1·66| 2·86| 5·80| 9·30| 9·30| | 10 | 2·46 | 12 | 1·76| 2·78| 6·18| 9·20| 9·30| | 15 | 2·22 | 13 | 1·80| 2·78| 6·10| 9·20| 9·40| | 20 | 2·06 | 14 | 2·00| 2·46| 6·48| 9·20| 9·44| | 25 | 1·86 | 15 | 2·00| 2·34| 7·12| 9·00| | | | +-----+-----+-----+-----+-----+-----+ | 28 | 1·78 | 16 | 1·88| 2·32| 6·92| 8·80| | | +---------+ | | | | | | | Mean.| 2·23| 17 | 1·88| 2·30| 6·90| 8·80| | | -----+---------+ | | | | | | | |March. | 18 | 1·82| 2·34| 6·80| 8·90| | | 1 | 1·72 | 19 | 1·64| 2·34| 6·70| 8·96| | | 5 | 1·70 | 20 | 1·70| 2·34| 6·80| 9·10| | | | +-----+-----+-----+-----+-----+-----+ | 10 | 1·64 | 21 | 1·72| 2·50| 7·10| 9·00| | | 15 | 1·50 | 22 | 1·72| 2·42| 7·30| 9·10| | | 20 | 1·44 | 23 | 1·68| 2·48| 7·20| 9·20| | | 25 | 1·70 | 24 | 1·76| 2·52| 7·40| 9·10| | | 30 | 1·80 | 25 | 1·98| 2·54| 7·50| 9·30| | | +---------+-----+-----+-----+-----+-----+-----+ | Mean.| 1·64 | 26 | 2·46| 2·68| 8·04| 9·72| | | -----+---------+ | | | | | | | |April. | 27 | 2·50| 2·80| 8·22| 9·50| | | 1 | 1·80 | 28 | 2·52| 2·94| 8·00| 9·30| | | 5 | 1·76 | 29 | 2·48| -- | 8·04| 9·20| | | 10 | 1·64 | 30 | 2·46| 3·98| 8·70| 9·30| | | | +-----+-----+-----+-----+-----+-----+ | 15 | 1·58 | 31 | 2·36| 9·20| 9·30| | | | | +-----+-----+-----+-----+-----+-----+ | 20 | 1·50 |Mean.| 1·86| 2·76| 6·52| 9·34| | | | +-----+-----+-----+-----+-----+-----+ | 25 | 1·50 | | | | | | | | 30 | 1·50 | | | | | | | | +---------+ | | | | | | | Mean.| 1·60 | | | | | | | | =====+=========+=====+=====+=====+=====+=====+=====+=====+========

TABLE LXII.--_Khartoum gauges._

=====+=============================+=============================+ Date.| 1874 | 1877 | -----+----+----+----+----+----+----+----+----+----+----+----+----+ | May|June|July|Aug.|Sep.|Oct.| May|June|July|Aug.|Sep.|Oct.| -----+----+----+----+----+----+----+----+----+----+----+----+----+ 1 | .. |1·01|2·50|5·60|7·18|6·66| .. | ·97|2·81|5·20|4·97|4·30| 2 | .. |1·06|2·50|5·65|7·18|6·66| .. | ·97|2·77|4·79|4·97|4·30| 3 | .. |1·22|2·50|5·78|7·22|6·55| .. | ·97|2·68|4·79|4·84|4·25| 4 | .. |1·44|2·59|5·85|7·27|6·50| .. | ·97|2·54|4·54|4·88|4·21| 5 | .. |1·55|2·68|6·01|7·27|6·41| .. | ·97|2·54|4·43|4·88|4·21| -----+----+----+----+----+----+----+----+----+----+----+----+----+ 6 | .. |1·60|2·68|6·14|7·20|6·30| .. | ·92|2·68|4·43|4·88|4·21| 7 | .. |1·60|2·75|6·23|7·13|6·26| .. | ·01|2·86|4·66|4·97|4·12| 8 | ·07|1·80|2·86|6·32|7·18|6·19| .. | ·88|2·95|4·84|4·97|4·12| 9 | ·14|1·98|2·99|6·46|7·18|6·08| .. | ·83|3·04|4·84|4·97|3·98| 10 | ·50|1·98|3·04|6·55|7·13|5·92| ·02| ·83|3·22|4·84|4·97|3·98| -----+----+----+----+----+----+----+----+----+----+----+----+----+ 11 | ·50|1·76|3·22|6·68|7·09|5·78| ·02| ·88|3·35|4·97|4·97|3·98| 12 | ·86|1·76|3·31|6·77|7·13|5·65| ·02|1·24|3·35|5·06|5·00|3·98| 13 | ·97|1·76|3·22|6·84|7·22|5·65| ·02|1·37|3·22|5·06|5·06|3·98| 14 | ·97|1·76|3·49|6·84|7·18|5·60| ·02|1·37|3·22|5·06|5·06|3·87| 15 | ·99|1·80|3·80|6·91|7·09|5·51| ·02|1·60|3·58|4·97|5·11|3·87| -----+----+----+----+----+----+----+----+----+----+----+----+----+ 16 |1·04|1·85|4·03|7·04|7·04|5·44| ·02|1·73|3·62|4·97|5·11| .. | 17 |1·15|1·91|4·12|7·13|7·04|5·38| ·02|2·05|3·67|4·97|5·06| .. | 18 |1·28|1·91|4·25|7·04|7·04|5·31| ·02|1·96|3·67|4·97|4·97| .. | 19 |1·35|1·91|4·52|7·00|6·93|5·11| ·02|1·87|3·89|4·97|4·97| .. | 20 |1·58|1·91|4·61|7·04|6·89|4·97| ·02|1·87|4·03|4·97|4·97| .. | -----+----+----+----+----+----+----+----+----+----+----+----+----+ 21 |1·77|1·96|4·84|6·91|6·89|4·84| ·11|1·87|4·12|4·93|4·97| .. | 22 |1·60|1·96|4·88|7·00|6·82|4·70| ·34|1·96|4·21|4·93|4·84| .. | 23 |1·46|2·00|4·97|6·93|6·82|4·61| ·38|2·05|4·30|5·02|4·84| .. | 24 |1·33|2·05|5·11|6·91|6·86|4·43| ·68|2·27|4·12|5·02|4·79| .. | 25 |1·26|2·09|5·11|6·98|6·82|4·30| ·90|2·27|4·12|5·02|4·75| .. | -----+----+----+----+----+----+----+----+----+----+----+----+----+ 26 |1·19|2·18|5·31|7·00|6·82|4·21|1·01|2·14|4·12|5·15|4·70| .. | 27 |1·19|2·36|5·42|7·00|6·73|4·10|1·19|2·14|4·21|5·15|4·66| .. | 28 |1·19|2·41|5·51|7·00|6·66|4·10|1·33|2·14|4·43|5·15|4·57| .. | 29 |1·08|2·41|5·51|7·13|6·66|4·10|1·28|2·41|4·61|5·24|4·57| .. | 30 |1·01|2·41|5·51|7·09|6·66|4·10|1·19|2·72|4·70|5·24|4·39| .. | -----+----+----+----+----+----+----+----+----+----+----+----+----+ 31 |1·01| .. |5·56|7·13| .. |4·10|1·06| .. |4·77|5·06| .. | .. | -----+----+----+----+----+----+----+----+----+----+----+----+----+ Mean | .. |1·85|3·98|6·67|7·01|5·34| .. |1·54|3·60|4·95|4·89| .. | =====+====+====+====+====+====+====+====+====+====+====+====+====+

=====+============================= Date.| 1878 -----+----+----+----+----+----+---- | May|June|July|Aug.|Sep.| Oct. -----+----+----+----+----+----+---- 1 | .. | ·02|2·63|4·30|6·46|7·20 2 | .. | ·08|2·54|4·41|6·59|7·11 3 | .. | ·61|2·50|4·70|6·64|7·18 4 | .. | ·79|2·45|5·11|6·75|7·00 5 | .. |1·13|2·45|5·31|6·82|6·82 -----+----+----+----+----+----+---- 6 | .. |1·42|2·68|5·38|6·89|6·73 7 | .. |1·49|2·77|5·51|6·98|6·68 8 | .. |1·55|2·95|5·51|6·95|6·64 9 | .. |1·89|2·97|5·51|7·04|6·59 10 | ·05|1·62|2·97|5·51|7·09|6·55 -----+----+----+----+----+----+---- 11 | ·05|1·62|3·04|5·85|7·16|6·64 12 | ·05|1·62|3·29|5·94|7·25|6·35 13 | ·05|1·64|3·44|6·03|7·25|6·30 14 | ·05|1·73|3·51|6·05|7·31|5·26 15 | ·05|1·80|3·51|6·12|7·31|6·19 -----+----+----+----+----+----+---- 16 | ·05|1·80|3·51|6·21|7·36|6·12 17 | ·05|1·78|3·51|6·21|7·40|6·08 18 | ·05|1·73|3·51|6·14|7·47|6·03 19 | ·05|1·69|3·76|6·08|7·47|5·96 20 | ·05|1·71|4·03|6·01|7·56|5·92 -----+----+----+----+----+----+---- 21 | ·05|1·80|4·07|6·01|7·58|5·78 22 |-·02|1·76|4·05|5·78|7·58|5·72 23 |0·0 |1·82|4·10|5·67|7·52|5·65 24 |0·0 |2·05|4·30|5·76|7·43|5·56 25 | ·14|2·21|4·30|5·92|7·43|5·46 -----+----+----+----+----+----+---- 26 | ·11|2·25|4·21|5·92|7·43|5·38 27 | ·05|2·27|4·21|5·94|7·38|5·49 28 |-·02|2·41|4·21|6·14|7·38|5·24 29 | ·05|2·50|4·23|6·14|7·38|5·20 30 | ·02|2·61|4·30|6·32|7·27| .. -----+----+----+----+----+----+---- 31 | ·02| .. |4·30|6·44| .. | .. -----+----+----+----+----+----+---- Mean | .. |1·62|3·49|5·74|6·87|6·16 =====+====+====+====+====+====+====

TABLE LXII.--_Khartoum gauges._

1901 =====+=========+=====+=====+=====+=====+=====+=====+=====+======== Date.| Month. |Date.| May.|June.|July.| Au- |Sept.|Date.| Month. | | | | | |gust.| | | -----+---------+-----+-----+-----+-----+-----+-----+-----+-------- | January.| | | | | | | |October. 1 | 1·51 | 1 | 0·45| 0·47| 2·35| 4·90| 6·10| 1 | 4·36 5 | 1·44 | 2 | 0·48| 0·50| 2·58| 4·96| 6·10| 5 | 4·04 10 | 1·30 | 3 | 0·46| 0·60| 2·75| 5·00| 6·05| 10 | 3·60 15 | 1·17 | 4 | 0·42| 0·64| 2·70| 5·05| 5·08| 15 | 3·44 20 | 1·05 | 5 | 0·42| 0·81| 2·57| 5·05| 6·08| 20 | 3·28 | +-----+-----+-----+-----+-----+-----+ | 25 | 0·93 | 6 | 0·42| 0·82| 2·60| 5·12| 5·94| 25 | 3·12 30 | 0·84 | 7 | 0·40| 0·85| 2·60| 5·28| 5·88| 30 | 2·91 +---------+ | | | | | | +-------- Mean.| 1·15 | 8 | 0·39| 0·84| 2·70| 5·40| 5·91|Mean.| 3·48 -----+---------+ | | | | | +-----+-------- |February.| 9 | 0·37| 0·80| 2·82| 5·47| 5·95| | Novem. 1 | 0·84 | 10 | 0·34| 0·77| 2·90| 5·55| 5·98| 1 | 2·83 | +-----+-----+-----+-----+-----+-----+ | 5 | 0·81 | 11 | 0·34| 0·98| 2·92| 5·45| 5·92| 5 | 2·67 10 | 0·73 | 12 | 0·32| 1·28| 2·97| 5·40| 5·98| 10 | 2·43 15 | 0·67 | 13 | 0·37| 1·39| 3·00| 5·56| 5·98| 15 | 2·28 20 | 0·60 | 14 | 0·25| 1·51| 3·08| 5·70| 6·00| 20 | 2·16 25 | 0·45 | 15 | 0·25| 1·70| 3·17| 5·85| 5·96| 25 | 2·00 | +-----+-----+-----+-----+-----+-----+ | 28 | 0·44 | 16 | 0·25| 1·60| 3·30| 5·89| 5·93| 30 | 1·87 +---------+ | | | | | +-----+-------- Mean.| 0·66 | 17 | 0·19| 1·49| 3·30| 5·96| 5·82|Mean.| 2·29 -----+---------+ | | | | | |-----+-------- |March | 18 | 0·08| 1·47| 3·38| 5·96| 5·74| | Decem. 1 | 0·43 | 19 | 0·08| 1·50| 3·43| 5·96| 5·56| 1 | 1·87 5 | 0·39 | 20 | 0·14| 1·55| 3·50| 6·10| 5·40| 5 | 1·83 | +-----+-----+-----+-----+-----+-----+ | 10 | 0·28 | 21 | 0·19| 1·63| 3·50| 6·05| 5·18| 10 | 1·75 15 | 0·20 | 22 | 0·22| 1·80| 3·57| 5·98| 5·18| 15 | 1·58 20 | 0·15 | 23 | 0·12| 2·05| 3·54| 6·01| 5·10| 20 | 1·50 25 | 0·09 | 24 | 0·15| 2·26| 3·54| 6·05| 5·00| 25 | 1·35 30 | 0·08 | 25 | 0·20| 2·20| 3·58| 5·97| 4·89| 30 | 1·16 +---------+-----+-----+-----+-----+-----+-----+ +-------- Mean.| 0·22 | 26 | 0·18| 2·00| 3·74| 5·80| 4·84|Mean.| 1·56 -----+---------+ | | | | | +-----+-------- |April | 27 | 0·25| 1·95| 4·10| 5·68| 4·78| | 1 | 0·06 | 28 | 0·27| 1·98| 4·28| 5·68| 4·70| | 5 | 0·05 | 29 | 0·34| 1·98| 4·65| 5·85| 4·58| | 10 | -0·05 | 30 | 0·45| 2·10| 4·83| 5·89| 4·49| | | +-----+-----+-----+-----+-----+-----+ | 15 | -0·07 | 31 | 0·45| .. | 4·85| 6·03| .. | | | +-----+-----+-----+-----+-----+-----+ | 20 | 0·11 |Mean.| 0·30| 1·38| 3·32| 5·63| 5·57| | | +-----+-----+-----+-----+-----+-----+ | 25 | 0·27 | | | | | | | | 30 | .. | | | | | | | | +---------+ | | | | | | | Mean.| 0·09 | | | | | | | | =====+=========+=====+=====+=====+=====+=====+=====+=====+======== 1902 =====+=========+=====+=====+=====+=====+=====+=====+=====+======== Date.| Month. |Date.| May.|June.|July.| Au- |Sept.|Date.| Month. | | | | | |gust.| | | -----+---------+-----+-----+-----+-----+-----+-----+-----+-------- |January. | | | | | | | |October. 1 | 1·13 | 1 | 0·05| 0·10| 1·80| 3·34| 5·20| 1 | 5·14 5 | 1·03 | 2 | 0·05| 0·23| 1·87| 3·52| 5·20| 5 | 4·88 10 | 0·84 | 3 | 0·04| 0·41| 1·79| 3·62| 5·23| 10 | 4·45 15 | 0·73 | 4 | 0·01| 0·55| 1·75| 3·71| 5·27| 15 | 3·86 20 | 0·63 | 5 | 0·02| 0·74| 1·70| 3·79| 5·27| 20 | 3·63 | +-----+-----+-----+-----+-----+-----+ | 25 | 0·54 | 6 |-0·10| 0·76| 1·76| 3·94| 5·27| 25 | 3·35 30 | 0·50 | 7 |-0·08| 0·78| 1·85| 4·00| 5·28| 30 | 3·05 +---------+ | | | | | | +-------- Mean.| 0·75 | 8 |-0·05| 0·76| 2·03| 4·20| 5·33|Mean.| 3·97 -----+---------+ | | | | | |-----+-------- |February.| 9 |-0·05| 0·75| 2·13| 4·30| 5·40| |Novemb. 1 | 0·48 | 10 |-0·06| 0·77| 2·16| 4·38| 5·40| 1 | 3·00 | +-----+-----+-----+-----+-----+-----+ | 5 | 0·45 | 11 |-0·07| 0·84| 2·07| 4·40| 5·36| 5 | 2·84 10 | 0·38 | 12 |-0·04| 1·00| 2·09| 4·50| 5·35| 10 | 2·60 15 | 0·33 | 13 |-0·04| 0·84| 2·05| 4·48| 5·38| 15 | 2·44 20 | 0·25 | 14 |-0·01| 0·78| 2·14| 4·50| 5·50| 20 | 2·24 25 | 0·19 | 15 | 0·01| 0·75| 2·17| 4·50| 5·42| 25 | 2·18 | +-----+-----+-----+-----+-----+-----+ | 28 | 0·15 | 16 | 0·04| 0·72| 2·24| 4·48| 5·40| 30 | 2·08 +---------+ | | | | | | +-------- Mean.| 0·32 | 17 | 0·03| 0·69| 2·29| 4·45| 5·40|Mean.| 2·46 -----+---------+ | | | | | |-----+-------- |March. | 18 | 0·08| 0·74| 2·33| 4·39| 5·40| |Decemb. 1 | 0·14 | 19 | 0·18| 0·84| 2·34| 4·50| 5·30| 1 | 2·06 5 | 0·10 | 20 | 0·14| 1·06| 2·36| 4·61| 5·39| 5 | 1·94 | +-----+-----+-----+-----+-----+-----+ | 10 | 0·09 | 21 | 0·14| 1·24| 2·52| 4·87| 5·30| 10 | 1·83 15 | 0·07 | 22 | 0·16| 1·36| 2·54| 4·93| 5·24| 15 | 1·71 20 | 0·15 | 23 | 0·16| 1·27| 2·56| 4·93| 5·12| 20 | 1·62 25 | 0·19 | 24 | 0·09| 1·29| 2·62| 4·90| 5·10| 25 | 1·55 30 | 0·07 | 25 | 0·10| 1·21| 2·64| 4·90| 5·10| 30 | 1·43 +---------+-----+-----+-----+-----+-----+-----+ +-------- Mean.| 0·11 | 26 | 0·11| 1·15| 2·69| 5·00| 5·10|Mean.| 1·71 -----+---------+ | | | | | |-----+-------- |April. | 27 | 0·16| 1·30| 2·69| 5·17| 5·05| | 1 | 0·07 | 28 | 0·14| 1·59| 2·79| 5·30| 5·03| | 5 | -0·02 | 29 | 0·09| 1·75| 2·94| 5·34| 5·06| | 10 | 0·01 | 30 | 0·10| 1·73| 2·96| 5·30| 5·16| | | +-----+-----+-----+-----+-----+-----+ | 15 | -0·07 | 31 | 0·11| .. | 3·24| 5·30| .. | | | +-----+-----+-----+-----+-----+-----+ | 20 | -0·01 |Mean.| 0·05| 0·90| 2·30| 4·50| 5·26| | | +-----+-----+-----+-----+-----+-----+ | 25 | -0·04 | | | | | | | | 30 | 0·01 | | | | | | | | -----+---------+ | | | | | | | Mean.| -0·01 | | | | | | | | =====+=========+=====+=====+=====+=====+=====+=====+=====+======== 1903 =====+=========+=====+=====+=====+=====+=====+=====+=====+======== Date.| Month. |Date.| May.|June.|July.| Au- |Sept.|Date.| Month. | | | | | |gust.| | | -----+---------+-----+-----+-----+-----+-----+-----+-----+-------- |January. | | | | | | | |October. 1 | 1·40 | 1 |-0·16| 1·05| 1·54| 3·50| 6·24| 1 | 5·50 5 | 1·30 | 2 |-0·20| 1·05| 1·60| 3·80| 6·30| 5 | 5·40 10 | 1·21 | 3 |-0·23| 0·98| 1·78| 4·05| 6·15| 10 | 5·15 15 | 1·10 | 4 |-0·26| 0·98| 1·95| 4·40| 6·20| 15 | 4·50 20 | 1·02 | 5 |-0·26| 1·16| 2·13| 4·60| 6·20| 20 | 4·48 | +-----+-----+-----+-----+-----+-----+ | 25 | 0·87 | 6 |-0·23| 1·40| 2·10| 4·75| 6·15| 25 | 4·40 30 | 0·73 | 7 |-0·23| 1·40| 2·10| 4·87| 6·12| 30 | 4·00 +---------+ | | | | | | +------- Mean.| 1·07 | 8 |-0·23| 1·36| 2·20| 4·95| 6·15|Mean.| 4·74 -----+---------+ | | | | | +-----+------- |February.| 9 |-0·22| 1·30| 2·35| 5·06| 6·24| |Novem. 1 | 0·65 | 10 |-0·24| 1·25| 2·48| 5·06| 6·14| 1 | 3·85 | +-----+-----+-----+-----+-----+-----+ | 5 | 0·61 | 11 |-0·28| 1·25| 2·55| 5·10| 6·15| 5 | 3·60 10 | 0·47 | 12 |-0·24| 1·30| 2·58| 5·35| 6·05| 10 | 3·25 15 | 0·42 | 13 |-0·26| 1·41| 2·75| 5·55| 5·96| 15 | 3·00 20 | 0·39 | 14 |-0·25| 1·56| 2·80| 5·65| 5·90| 20 | 2·65 25 | 0·25 | 15 |-0·26| 1·65| 2·80| 5·55| 5·86| 25 | 2·60 | +-----+-----+-----+-----+-----+-----+ | 28 | 0·22 | 16 |-0·26| 1·75| 2·75| 5·70| 5·95| 30 | 2·45 +---------+ | | | | | | +------- Mean.| 0·43 | 17 |-0·23| 1·85| 2·75| 5·80| 5·88|Mean.| 3·01 -----+---------+ | | | | | +-----+------- | March. | 18 |-0·21| 2·00| 2·75| 5·70| 5·88| |Decem. 1 | 0·22 | 19 |-0·19| 1·90| 2·85| 5·80| 5·85| 1 | 2·40 5 | 0·19 | 20 |-0·18| 1·85| 2·95| 5·80| 5·90| 5 | 2·30 | +-----+-----+-----+-----+-----+-----+ | 10 | 0·13 | 21 |-0·14| 1·70| 3·05| 5·90| 5·95| 10 | 2·09 15 | 0·08 | 22 |-0·09| 1·60| 3·25| 5·95| 6·00| 15 | 1·93 20 | 0·04 | 23 |-0·02| 1·55| 3·40| 6·00| 6·10| 20 | 1·90 25 | -0·05 | 24 | 0·12| 1·55| 3·40| 6·00| 6·10| 25 | 1·88 30 | -0·11 | 25 | 0·26| 1·56| 3·40| 6·03| 6·08| 30 | 1·80 +---------+-----+-----+-----+-----+-----+-----+ +------- Mean.| 0·06 | 26 | 0·33| 1·58| 3·42| 6·08| 6·02|Mean.| 2·01 -----+---------+ | | | | | +-----+------- | April. | 27 | 0·40| 1·60| 3·42| 6·00| 5·85| | 1 | -0·11 | 28 | 0·53| 1·61| 3·42| .. | 5·80| | 5 | -0·13 | 29 | 0·90| 1·54| 3·45| .. | 5·60| | 10 | -0·10 | 30 | 0·98| 1·54| 3·45| 6·15| 5·55| | | +-----+-----+-----+-----+-----+-----+ | 15 | -0·14 | 31 | 1·01| .. | 3·45| 6·28| .. | | | +-----+-----+-----+-----+-----+-----+ | 20 | -0·12 |Mean.|-0·01| 1·47| 2·73| 5·36| 6·01| | | +-----+-----+-----+-----+-----+-----+ | 25 | -0·16 | | | | | | | | 30 | -0·18 | | | | | | | | +---------+ | | | | | | | Mean.| -0·13 | | | | | | | | =====+=========+=====+=====+=====+=====+=====+=====+=====+======== 1904 =====+=========+=====+=====+=====+=====+=====+=====+=====+======== Date.| Month. |Date.| May.|June.|July.| Au- |Sept.|Date.| Month. | | | | | |gust.| | | -----+---------+-----+-----+-----+-----+-----+-----+-----+-------- |January. | | | | | | | | 1 | 1·80 | 1 | 0·15| 0·61| 1·35| 5·00| 5·48| .. | .. 5 | 1·78 | 2 | 0·15| 0·60| 1·55| 5·30| 5·58| .. | .. 10 | 1·70 | 3 | 0·15| 0·60| 1·79| 5·50| 5·58| .. | .. 15 | 1·59 | 4 | 0·10| 0·63| 2·15| 5·50| 5·54| .. | .. 20 | 1·55 | 5 | 0·10| 0·70| 2·40| 5·55| 5·54| .. | .. | +-----+-----+-----+-----+-----+-----+-----+-------- 25 | 1·50 | 6 | 0·12| 0·92| 2·68| 5·60| 5·50| .. | .. 30 | 1·50 | 7 | 0·29| 1·17| 2·76| 5·58| 5·50| .. | .. +---------+ | | | | | | | Mean.| 1·59 | 8 | 0·10| 1·23| 2·76| 5·58| 5·46| .. | .. -----+---------+ | | | | | | | |February.| 9 | 0·00| 1·22| 2·74| 5·58| 5·36| .. | .. 1 | 1·48 | 10 |-0·01| 1·20| 2·76| 5·58| 5·34| .. | .. | +-----+-----+-----+-----+-----+-----+-----+-------- 5 | 1·47 | 11 |+0·05| 1·17| 2·70| 5·64| 5·34| .. | .. 10 | 1·35 | 12 | 0·08| 1·16| 2·84| 5·55| 5·34| .. | .. 15 | 1·15 | 13 | 0·08| 1·15| 3·05| 5·48| 5·34| .. | .. 20 | 1·13 | 14 | 0·08| 1·15| 3·07| 5·48| 5·40| .. | .. 25 | 1·08 | 15 | 0·10| 1·16| 3·15| 5·44| 5·40| .. | .. | +-----+-----+-----+-----+-----+-----+-----+-------- 28 | 1·07 | 16 | 0·10| 1·16| 3·40| 5·30| .. | .. | .. +---------+ | | | | | | | Mean.| 1·23 | 17 | 0·24| 1·16| 3·62| 5·20| .. | .. | .. -----+---------+ | | | | | | | |March | 18 | 0·29| 1·02| 3·63| 5·30| .. | .. | .. 1 | 1·05 | 19 | 0·31| 0·96| 3·63| 5·30| .. | .. | .. 5 | 0·80 | 20 | 0·21| 1·00| 3·63| 5·22| .. | .. | .. | +-----+-----+-----+-----+-----+-----+-----+-------- 10 | 0·53 | 21 | 0·19| 1·00| 3·65| 5·25| .. | .. | .. 15 | 0·37 | 22 | 0·21| 1·03| 3·75| 5·25| .. | .. | .. 20 | 0·31 | 23 | 0·24| 1·02| 3·95| 5·30| .. | .. | .. 25 | 0·25 | 24 | 0·25| 1·06| 4·00| 5·30| .. | .. | .. 30 | 0·31 | 25 | 0·30| 1·07| 4·02| 5·30| .. | .. | .. +---------+-----+-----+-----+-----+-----+-----+-----+------- Mean.| 0·48 | 26 | 0·32| 1·07| 4·15| 5·45| .. | .. | .. -----+---------+ | | | | +-----+-----+------- |April | 27 | 0·40| 1·06| 4·38| 5·45| .. | | 1 | 0·10 | 28 | 0·48| 1·08| 4·45| 5·62| .. | | 5 | 0·29 | 29 | 0·57| 1·16| 4·45| 5·48| .. | | 10 | 0·25 | 30 | 0·61| 1·20| 4·45| 5·43| .. | | | +-----+-----+-----+-----+-----+-----+ | 15 | 0·18 | 31 | 0·60| .. | 4·75| 5·45| .. | | | +-----+-----+-----+-----+-----+-----+ | 20 | 0·20 |Mean.| 0·22| 1·02| .. | 5·41| .. | | | +-----+-----+-----+-----+-----+-----+ | 25 | 0·18 | | | | | | | | 30 | 0·15 | | | | | | | | -----+---------+ | | | | | | | Mean.| 0·21 | | | | | | | | =====+=========+=====+=====+=====+=====+=====+=====+=====+=======

TABLE LXII. (continued).--_Khartoum gauges._

1904 =====+=========+=====+=====+=====+=====+=====+=====+=====+======== Date.| Month. |Date.| May.|June.|July.| Au- |Sept.|Date.| Month. | | | | | |gust.| | | -----+---------+-----+-----+-----+-----+-----+-----+-----+-------- |January. | | | | | | | | 1 | 1·80 | 1 | 0·15| 0·61| 1·35| 5·00| 5·48| .. | .. 5 | 1·78 | 2 | 0·15| 0·60| 1·55| 5·30| 5·58| .. | .. 10 | 1·70 | 3 | 0·15| 0·60| 1·79| 5·50| 5·58| .. | .. 15 | 1·59 | 4 | 0·10| 0·63| 2·15| 5·50| 5·54| .. | .. 20 | 1·55 | 5 | 0·10| 0·70| 2·40| 5·55| 5·54| .. | .. | +-----+-----+-----+-----+-----+-----+-----+------- 25 | 1·50 | 6 | 0·12| 0·92| 2·68| 5·60| 5·50| .. | .. 30 | 1·50 | 7 | 0·29| 1·17| 2·76| 5·58| 5·50| .. | .. +---------+ | | | | | | | Mean.| 1·59 | 8 | 0·10| 1·23| 2·76| 5·58| 5·46| .. | .. -----+---------+ | | | | | | | |February.| 9 | 0·00| 1·22| 2·74| 5·58| 5·36| .. | .. 1 | 1·48 | 10 |-0·01| 1·20| 2·76| 5·58| 5·34| .. | .. | +-----+-----+-----+-----+-----+-----+-----+------- 5 | 1·47 | 11 |+0·05| 1·17| 2·70| 5·64| 5·34| .. | .. 10 | 1·35 | 12 | 0·08| 1·16| 2·84| 5·55| 5·34| .. | .. 15 | 1·15 | 13 | 0·08| 1·15| 3·05| 5·48| 5·34| .. | .. 20 | 1·13 | 14 | 0·08| 1·15| 3·07| 5·48| 5·40| .. | .. 25 | 1·08 | 15 | 0·10| 1·16| 3·15| 5·44| 5·40| .. | .. | +-----+-----+-----+-----+-----+-----+-----+------- 28 | 1·07 | 16 | 0·10| 1·16| 3·40| 5·30| .. | .. | .. +---------+ | | | | | | | Mean.| 1·23 | 17 | 0·24| 1·16| 3·62| 5·20| .. | .. | .. -----+---------+ | | | | | | | |March | 18 | 0·29| 1·02| 3·63| 5·30| .. | .. | .. 1 | 1·05 | 19 | 0·31| 0·96| 3·63| 5·30| .. | .. | .. 5 | 0·80 | 20 | 0·21| 1·00| 3·63| 5·22| .. | .. | .. | +-----+-----+-----+-----+-----+-----+-----+------- 10 | 0·53 | 21 | 0·19| 1·00| 3·65| 5·25| .. | .. | .. 15 | 0·37 | 22 | 0·21| 1·03| 3·75| 5·25| .. | .. | .. 20 | 0·31 | 23 | 0·24| 1·02| 3·95| 5·30| .. | .. | .. 25 | 0·25 | 24 | 0·25| 1·06| 4·00| 5·30| .. | .. | .. 30 | 0·31 | 25 | 0·30| 1·07| 4·02| 5·30| .. | .. | .. +---------+-----+-----+-----+-----+-----+-----+-----+------- Mean.| 0·48 | 26 | 0·32| 1·07| 4·15| 5·45| .. | .. | .. -----+---------+ | | | | +-----+-----+------- |April | 27 | 0·40| 1·06| 4·38| 5·45| .. | | 1 | 0·10 | 28 | 0·48| 1·08| 4·45| 5·62| .. | | 5 | 0·29 | 29 | 0·57| 1·16| 4·45| 5·48| .. | | 10 | 0·25 | 30 | 0·61| 1·20| 4·45| 5·43| .. | | | +-----+-----+-----+-----+-----+-----+ | 15 | 0·18 | 31 | 0·60| .. | 4·75| 5·45| .. | | | +-----+-----+-----+-----+-----+-----+ | 20 | 0·20 |Mean.| 0·22| 1·02| 3·28| 5·41| .. | | | +-----+-----+-----+-----+-----+-----+ | 25 | 0·18 | | | | | | | | 30 | 0·15 | | | | | | | | -----+---------+ | | | | | | | Mean.| 0·21 | | | | | | | | =====+=========+=====+=====+=====+=====+=====+=====+=====+=======

TABLE LXIII.--_River Atbara gauges at Khasm el Girba._

1903 =====+====+====+====+====+====+====+====+====+====+====+====+==== Date.|Jan.|Feb.|Mar.|Apr.|May.|Jun.|Jul.|Aug.|Sep.|Oct.|Nov.|Dec. -----+----+----+----+----+----+----+----+----+----+----+----+---- 1 | .. | .. | .. | .. | .. |1·00|2·20|4·21|4·52|2·88| .. | .. 2 | .. | .. | .. | .. | .. |0·93|2·18|4·00|4·52|2·78| .. | .. 3 | .. | .. | .. | .. | .. |0·85|2·15|3·56|4·60|2·78| .. | .. 4 | .. | .. | .. | .. | .. |0·85|2·74|3·25|4·70|2·90| .. | .. 5 | .. | .. | .. | .. | .. |0·89|2·60|3·35|4·55|2·75| .. | .. -----+----+----+----+----+----+----+----+----+----+----+----+---- 6 | .. | .. | .. | .. | .. |0·89|2·30|3·27|4·66|2·67| .. | .. 7 | .. | .. | .. | .. | .. |0·86|2·10|3·30|4·58|2·50| .. | .. 8 | .. | .. | .. | .. | .. |0·97|2·10|3·07|4·50|2·50| .. | .. 9 | .. | .. | .. | .. | .. |1·05|2·51|3·29|4·15|2·38| .. | .. 10 | .. | .. | .. | .. | .. |1·11|2·35|3·72|4·30|2·30| .. | .. -----+----+----+----+----+----+----+----+----+----+----+----+---- 11 | .. | .. | .. | .. | .. |1·00|2·65|4·61|3·89|2·22| .. | .. 12 | .. | .. | .. | .. | .. |0·97|2·31|4·37|3·95|2·17| .. | .. 13 | .. | .. | .. | .. | .. |0·90|2·10|4·53|3·80|2·17| .. | .. 14 | .. | .. | .. | .. | .. |0·90|2·10|4·60|3·84|2·08| .. | .. 15 | .. | .. | .. | .. | .. |0·93|2·65|4·85|3·71|2·05| .. | .. -----+----+----+----+----+----+----+----+----+----+----+----+---- 16 | .. | .. | .. | .. | .. |0·98|2·28|4·80|3·88|2·10| .. | .. 17 | .. | .. | .. | .. | .. |1·20|2·40|4·90|4·36|2·10| .. | .. 18 | .. | .. | .. | .. | .. |1·50|2·37|5·50|4·20| .. | .. | .. 19 | .. | .. | .. | .. | .. |1·70|2·55|5·50|4·00|2·05| .. | .. 20 | .. | .. | .. | .. | .. |1·98|2·74|5·75|4·12| .. | .. | .. -----+----+----+----+----+----+----+----+----+----+----+----+---- 21 | .. | .. | .. | .. | .. |1·88|2·83|5·47|3·80| .. | .. | .. 22 | .. | .. | .. | .. | .. |1·70|2·70|5·12|3·45| .. | .. | .. 23 | .. | .. | .. | .. | .. |1·90|2·70|4·82|3·30| .. | .. | .. 24 | .. | .. | .. | .. | .. |1·84|3·00|4·54|3·25| .. | .. | .. 25 | .. | .. | .. | .. | .. |2·20|2·62|4·35|3·10| .. | .. | .. -----+----+----+----+----+----+----+----+----+----+----+----+---- 26 | .. | .. | .. | .. | .. |1·93|2·53|4·20|2·89| .. | .. | .. 27 | .. | .. | .. | .. | .. |2·24|2·60|4·80|3·42| .. | .. | .. 28 | .. | .. | .. | .. | .. |2·20|2·76|4·55|3·10| .. | .. | .. 29 | .. | .. | .. | .. | .. |2·43|2·80|4·55|3·13| .. | .. | .. 30 | .. | .. | .. | .. | .. |2·20|3·29|4·75|3·05| .. | .. | .. 31 | .. | .. | .. | .. | .. | .. |3·54|4·45| .. | .. | .. | .. =====+====+====+====+====+====+====+====+====+====+====+====+==== 1904 =====+====+====+====+====+====+=====+====+====+====+====+====+==== Date.|Jan.|Feb.|Mar.|Apr.|May.| Jun.|Jul.|Aug.|Sep.|Oct.|Nov.|Dec. -----+----+----+----+----+----+-----+----+----+----+----+----+---- 1 | .. | .. | .. | .. | .. |-1·00|1·57|3·79|2·70| .. | .. | .. 2 | .. | .. | .. | .. | .. |-1·00|1·89|3·85|2·65| .. | .. | .. 3 | .. | .. | .. | .. | .. |-0·80|1·80|3·93|2·55| .. | .. | .. 4 | .. | .. | .. | .. | .. |-0·56|1·93|3·90|2·90| .. | .. | .. 5 | .. | .. | .. | .. | .. |-0·10|2·04|4·04|3·50| .. | .. | .. -----+----+----+----+----+----+-----+----+----+----+----+----+---- 6 | .. | .. | .. | .. | .. |+0·19|2·08|4·08|3·40| .. | .. | .. 7 | .. | .. | .. | .. | .. | 0·31|2·45|4·00|3·30| .. | .. | .. 8 | .. | .. | .. | .. | .. | 0·50|2·72|4·00|2·92| .. | .. | .. 9 | .. | .. | .. | .. | .. | 0·40|2·83|3·80|2·86| .. | .. | .. 10 | .. | .. | .. | .. | .. | 0·38|2·97|3·20|2·98| .. | .. | .. -----+----+----+----+----+----+-----+----+----+----+----+----+---- 11 | .. | .. | .. | .. | .. | 0·35|2·88|3·93|2·60| .. | .. | .. 12 | .. | .. | .. | .. | .. | 0·30|2·80|2·90|2·52| .. | .. | .. 13 | .. | .. | .. | .. | .. | 0·30|2·80|2·71|2·85| .. | .. | .. 14 | .. | .. | .. | .. | .. | 0·30|3·10|2·63|2·79| .. | .. | .. 15 | .. | .. | .. | .. | .. | 0·29|3·03|2·70|2·09| .. | .. | .. -----+----+----+----+----+----+-----+----+----+----+----+----+---- 16 | .. | .. | .. | .. | .. | 0·28|2·74|3·39| .. | .. | .. | .. 17 | .. | .. | .. | .. | .. | 0·32|2·91|3·39| .. | .. | .. | .. 18 | .. | .. | .. | .. | .. | 0·55|3·36|3·39| .. | .. | .. | .. 19 | .. | .. | .. | .. | .. | 0·40|3·30|3·28| .. | .. | .. | .. 20 | .. | .. | .. | .. | .. | 0·80|2·10|3·20| .. | .. | .. | .. -----+----+----+----+----+----+-----+----+----+----+----+----+---- 21 | .. | .. | .. | .. | .. | 0·80|3·12|3·20| .. | .. | .. | .. 22 | .. | .. | .. | .. | .. | 0·70|3·20|3·18| .. | .. | .. | .. 23 | .. | .. | .. | .. | .. | 0·85|3·50|2·80| .. | .. | .. | .. 24 | .. | .. | .. | .. | .. | 0·96|3·72|2·83| .. | .. | .. | .. 25 | .. | .. | .. | .. | .. | 0·95|3·13|2·90| .. | .. | .. | .. -----+----+----+----+----+----+-----+----+----+----+----+----+---- 26 | .. | .. | .. | .. | .. | 1·15|3·05|2·91| .. | .. | .. | .. 27 | .. | .. | .. | .. | .. | 1·30|3·36|2·96| .. | .. | .. | .. 28 | .. | .. | .. | .. | .. | 1·45|3·76|3·30| .. | .. | .. | .. 29 | .. | .. | .. | .. | .. | 1·51|3·69|3·50| .. | .. | .. | .. 30 | .. | .. | .. | .. | .. | 1·50|4·15|3·10| .. | .. | .. | .. 31 | .. | .. | .. | .. | .. | .. |3·80|3·08| .. | .. | .. | .. =====+====+====+====+====+====+=====+====+====+====+====+====+====

Zero = 10·00 metres on the gauge.

TABLE LXIV.--_Berber gauges._

1901 =====+=========+=====+=====+=====+=====+=====+=====+=====+======== Date.|Month. |Date.| May.|June.|July.| Au- |Sept.|Date.| Month. | | | | | |gust.| | | -----+---------+-----+-----+-----+-----+-----+-----+-----+-------- |January. | | | | | | | |October. 1 | 2·43 | 1 | 0·96| 0·97| 2·92| 6·25| 7·80| 1 | 5·93 5 | 2·35 | 2 | 0·98| 1·00| 2·89| 6·30| 7·79| 5 | 5·45 10 | 2·23 | 3 | 1·00| 1·03| 3·00| 6·40| 7·82| 10 | 5·08 15 | 2·07 | 4 | 1·02| 1·05| 3·20| 6·48| 7·75| 15 | 4·73 20 | 1·93 | 5 | 1·04| 1·07| 3·40| 6·56| 7·70| 20 | 4·44 | +-----+-----+-----+-----+-----+-----+ | 25 | 1·82 | 6 | 1·06| 1·10| 3·55| 6·79| 7·70| 25 | 4·20 30 | 1·70 | 7 | 1·05| 1·18| 3·60| 6·67| 7·62| 30 | 4·00 +---------+ | | | | | | +-------- Mean.| 2·06 | 8 | 1·05| 1·27| 3·65| 6·79| 7·64|Mean.| 4·74 -----+---------+ | | | | | +-----+-------- |February.| 9 | 1·07| 1·36| 3·70| 6·88| 7·45| |Novem. 1 | 1·63 | 10 | 1·10| 1·43| 3·75| 7·09| 7·50| 1 | 3·90 | +-----+-----+-----+-----+-----+-----+ 5 | 1·62 | 11 | 1·09| 1·45| 3·75| 7·45| 7·63| 5 | 3·75 10 | 1·54 | 12 | 1·07| 1·48| 3·78| 7·53| 7·67| 10 | 3·53 15 | 1·47 | 13 | 1·06| 1·47| 4·00| 7·58| 7·57| 15 | 3·38 20 | 1·38 | 14 | 1·05| 1·47| 4·14| 7·70| 7·55| 20 | 3·12 25 | 1·34 | 15 | 1·04| 1·53| 4·20| 7·76| 7·50| 25 | 2·97 | +-----+-----+-----+-----+-----+-----+ | 28 | 1·24 | 16 | 1·05| 1·70| 4·35| 7·65| 7·41| 30 | 2·83 +---------+ | | | | | | +-------- Mean.| 1·47 | 17 | 1·04| 1·87| 4·30| 7·68| 7·35|Mean.| 3·33 -----+---------+ | | | | | +-----+-------- |March. | 18 | 1·03| 2·00| 4·27| 7·74| 7·25| |Decem. 1 | 1·24 | 19 | 1·03| 2·15| 4·35| 7·65| 7·20| 1 | 2·86 5 | 1·24 | 20 | 1·00| 2·18| 4·55| 7·54| 7·05| 5 | 2·75 | +-----+-----+-----+-----+-----+-----+ | 10 | 1·08 | 21 | 1·00| 2·16| 4·59| 7·46| 6·90| 10 | 2·70 15 | 0·98 | 22 | 0·94| 2·14| 4·59| 7·46| 6·80| 15 | 2·52 20 | 0·94 | 23 | 0·86| 2·14| 4·62| 7·43| 6·70| 20 | 2·51 25 | 0·84 | 24 | 0·87| 2·17| 4·62| 7·41| 6·62| 25 | 2·30 30 | 0·86 | 25 | 0·88| 2·27| 4·65| 7·38| 6·51| 30 | 2·13 +---------+-----+-----+-----+-----+-----+-----+ +-------- Mean.| 1·01 | 26 | 0·91| 2·50| 4·95| 7·50| 6·41|Mean.| 2·52 -----+---------+ | | | | | +-----+-------- |April. | 27 | 0·87| 2·70| 5·05| 7·44| 6·27| | 1 | 0·83 | 28 | 0·85| 2·82| 5·16| 7·44| 6·18| | 5 | 0·86 | 29 | 0·87| 2·86| 5·58| 7·74| 6·13| | 10 | 0·82 | 30 | 0·93| 2·88| 5·74| 7·81| 6·08| | | +-----+-----+-----+-----+-----+-----+ | 15 | 0·63 | 31 | 0·95| .. | 6·15| 7·87| .. | | | +-----+-----+-----+-----+-----+-----+ | 20 | 0·72 |Mean.| 0·99| 1·78| 4·22| 7·27| 7·18| | | +-----+-----+-----+-----+-----+-----+ | 25 | 0·73 | | | | | | | | 30 | 0·93 | | | | | | | | +---------+ | | | | | | | Mean.| 0·74 | | | | | | | | =====+=========+=====+=====+=====+=====+=====+=====+=====+======== 1902 =====+=========+=====+=====+=====+=====+=====+=====+=====+======== Date.|Month. |Date.| May.|June.|July.| Au- |Sept.|Date.| Month. | | | | | |gust.| | | -----+---------+-----+-----+-----+-----+-----+-----+-----+-------- |January. | | | | | | | |October. 1 | 2·04 | 1 | 0·67| 0·86| 2·07| 4·32| 6·77| 1 | 6·23 5 | 1·90 | 2 | 0·67| 0·86| 2·27| 4·55| 6·75| 5 | 6·14 10 | 1·74 | 3 | 0·71| 0·86| 2·46| 4·78| 6·70| 10 | 5·73 15 | 1·51 | 4 | 0·71| 0·85| 2·52| 4·90| 6·72| 15 | 5·14 20 | 1·47 | 5 | 0·72| 0·85| 2·58| 5·06| 6·70| 20 | 4·62 | +-----+-----+-----+-----+-----+-----+ | 25 | 1·40 | 6 | 0·82| 0·91| 2·64| 5·17| 6·72| 25 | 4·28 30 | 1·30 | 7 | 0·78| 1·04| 2·62| 5·17| 6·77| 30 | 4·06 +---------+ | | | | | | +------- Mean.| 1·59 | 8 | 0·75| 1·18| 2·64| 5·27| 6·95|Mean.| 5·11 -----+---------+ | | | | | +-----+------- |February.| 9 | 0·70| 1·33| 2·65| 5·37| 6·91| |Novemb. 1 | 1·28 | 10 | 0·67| 1·41| 2·72| 5·45| 6·96| 1 | 3·96 | +-----+-----+-----+-----+-----+-----+ | 5 | 1·21 | 11 | 0·63| 1·44| 2·84| 5·49| 7·05| 5 | 3·65 10 | 1·12 | 12 | 0·63| 1·44| 2·95| 5·55| 6·97| 10 | 3·55 15 | 1·07 | 13 | 0·65| 1·48| 3·04| 5·67| 6·93| 15 | 3·30 20 | 1·06 | 14 | 0·65| 1·52| 3·10| 5·85| 6·91| 20 | 3·11 25 | 0·96 | 15 | 0·65| 1·57| 3·15| 5·85| 6·94| 25 | 3·07 | +-----+-----+-----+-----+-----+-----+ | 28 | 0·94 | 16 | 0·66| 1·65| 3·15| 5·85| 6·89| 30 | 2·95 +---------+ | | | | | | +------- Mean.| 1·09 | 17 | 0·67| 1·64| 3·22| 5·85| 6·84|Mean.| 3·34 -----+---------+ | | | | | +-----+------- |March. | 18 | 0·68| 1·58| 3·21| 5·87| 6·77| |Decemb. 1 | 0·88 | 19 | 0·69| 1·50| 3·36| 5·82| 6·75| 1 | 2·94 5 | 0·82 | 20 | 0·73| 1·49| 3·41| 5·89| 6·69| 5 | 2·88 | +-----+-----+-----+-----+-----+-----+ | 10 | 0·84 | 21 | 0·76| 1·47| 3·48| 6·21| 6·67| 10 | 2·75 15 | 0·83 | 22 | 0·77| 1·47| 3·54| 6·37| 6·63| 15 | 2·68 20 | 0·76 | 23 | 0·82| 1·53| 3·54| 6·42| 6·55| 20 | 2·55 25 | 0·76 | 24 | 0·85| 1·70| 3·59| 6·55| 6·47| 25 | 2·53 30 | 0·86 | 25 | 0·86| 1·90| 3·72| 6·48| 6·37| 30 | 2·37 +---------+-----+-----+-----+-----+-----+-----+ +------- Mean.| 0·81 | 26 | 0·86| 2·02| 3·82| 6·50| 6·35|Mean.| 2·66 -----+---------+ | | | | | +-----+------- |April. | 27 | 0·87| 2·06| 3·94| 6·48| 6·38| | 1 | 0·83 | 28 | 0·87| 2·06| .. | 6·45| 6·33| | 5 | 0·78 | 29 | 0·85| 2·10| 3·88| 6·63| 6·29| | 10 | 0·64 | 30 | 0·86| 2·00| 4·00| 6·80| 6·25| | | +-----+-----+-----+-----+-----+-----+ | 15 | 0·68 | 31 | 0·86| .. | 4·21| 6·80| .. | | | +-----+-----+-----+-----+-----+-----+ | 20 | 0·64 |Mean.| 0·74| 1·46| 3·14| 5·80| 6·70| | | +-----+-----+-----+-----+-----+-----+ | 25 | 0·67 | | | | | | | | 30 | 0·61 | | | | | | | | +---------+ | | | | | | | Mean.| 0·68 | | | | | | | | =====+=========+=====+=====+=====+=====+=====+=====+=====+======== 1903 =====+=========+=====+=====+=====+=====+=====+=====+=====+======== Date.|Month. |Date.| May.|June.|July.| Au- |Sept.|Date.| Month. | | | | | |gust.| | | -----+---------+-----+-----+-----+-----+-----+-----+-----+-------- |January. | | | | | | | |October. 1 | 2·36 | 1 | 0·83| 1·27| 2·80| 4·83| 7·73| 1 | 7·00 5 | 2·43 | 2 | 0·84| 1·43| 2·82| 4·89| 7·73| 5 | 6·84 10 | 2·24 | 3 | 0·83| 1·63| 2·82| 4·95| 7·72| 10 | 6·58 15 | 2·15 | 4 | 0·82| 1·74| 2·89| 5·65| 7·70| 15 | 6·15 20 | 2·09 | 5 | 0·79| 1·80| 2·93| 5·85| 7·72| 20 | 5·73 | +-----+-----+-----+-----+-----+-----+ | 25 | 1·95 | 6 | 0·76| 1·84| 2·98| 5·98| 7·77| 25 | 5·86 30 | 1·80 | 7 | 0·75| 1·85| 3·10| 6·18| 7·82| 30 | 5·33 +---------+ | | | | | | +------- Mean.| 2·13 | 8 | 0·73| 1·86| 3·25| 6·27| 7·74|Mean.| 6·16 -----+---------+ | | | | | +-----+------- |February.| 9 | 0·72| 1·96| 3·40| 6·37| 7·72| |Novemb. 1 | 1·70 | 10 | 0·76| 2·10| 3·47| 6·43| 7·72| 1 | 5·17 | +-----+-----+-----+-----+-----+-----+ | 5 | 1·59 | 11 | 0·79| 2·16| 3·43| 6·47| 7·72| 5 | 4·96 10 | 1·51 | 12 | 0·80| 2·18| 3·46| 6·50| 7·53| 10 | 4·53 15 | 1·42 | 13 | 0·80| 2·16| 3·56| 6·87| 7·64| 15 | 4·12 20 | 1·38 | 14 | 0·79| 2·13| 3·74| 7·13| 7·52| 20 | 3·88 25 | 1·23 | 15 | 0·77| 2·15| 3·82| 7·20| 7·45| 25 | 3·75 | +-----+-----+-----+-----+-----+-----+ | 28 | 1·20 | 16 | 0·76| 2·21| 3·95| 7·40| 7·40| 30 | .. +---------+ | | | | | | +------- Mean.| 1·44 | 17 | 0·76| 2·27| 4·00| 7·53| 7·40|Mean.| 4·28 -----+---------+ | | | | | +-----+------- |March. | 18 | 0·76| 2·37| 4·02| 7·53| 7·37| |Decemb. 1 | 1·20 | 19 | 0·77| 2·50| 4·00| 7·67| 7·35| 1 | 3·52 5 | 1·26 | 20 | 0·78| 2·60| 4·10| 7·75| 7·45| 5 | 3·38 | +-----+-----+-----+-----+-----+-----+ | 10 | 1·16 | 21 | 0·80| 2·72| 4·10| 8·05| 7·45| 10 | 3·28 15 | 1·10 | 22 | 0·80| 2·76| 4·13| 8·10| 7·45| 15 | 3·19 20 | 1·07 | 23 | 0·81| 2·76| 4·23| 7·80| 7·47| 20 | 3·10 25 | 1·01 | 24 | 0·82| 2·70| 4·37| 7·57| 7·47| 25 | 3·05 30 | 0·92 | 25 | 0·83| 2·65| 4·50| 7·60| 7·43| 30 | 2·92 +---------+-----+-----+-----+-----+-----+-----+ +------- Mean.| 1·10 | 26 | 0·86| 2·68| 4·67| 7·52| 7·43|Mean.| 3·22 -----+---------+ | | | | | +-----+------- |April. | 27 | 0·91| 2·70| 4·73| 7·62| 7·40| | 1 | 0·92 | 28 | 0·96| 2·70| 4·83| 7·67| 7·30| | 5 | 0·95 | 29 | 1·03| 2·70| 4·85| 7·56| 7·14| | 10 | 0·90 | 30 | 1·09| 2·74| 4·80| 7·72| 7·04| | | +-----+-----+-----+-----+-----+-----+ | 15 | 0·85 | 31 | 1·17| .. | 4·79| 7·74| .. | | | +-----+-----+-----+-----+-----+-----+ | 20 | 0·82 |Mean.| 0·82| 2·24| 3·82| 6·91| 7·52| | | +-----+-----+-----+-----+-----+-----+ | 25 | 0·80 | | | | | | | | 30 | 0·81 | | | | | | | | +---------+ | | | | | | | Mean.| 0·86 | | | | | | | | =====+=========+=====+=====+=====+=====+=====+=====+=====+======== 1904 =====+=========+=====+=====+=====+=====+=====+=====+=====+======== Date.|Month. |Date.| May.|June.|July.| Au- |Sept.|Date.| Month. | | | | | |gust.| | | -----+---------+-----+-----+-----+-----+-----+-----+-----+-------- |January. | | | | | | | | 1 | 2·90 | 1 | 1·11| 1·33| 1·95| 6·22| 6·75| | 5 | 2·86 | 2 | 1·09| 1·42| 1·98| 6·28| 6·67| | 10 | 2·75 | 3 | 1·07| 1·47| 2·14| 6·34| 6·67| | 15 | 2·68 | 4 | 1·07| 1·47| 2·32| 6·59| 6·68| | 20 | 2·59 | 5 | 1·07| 1·45| 2·43| 6·90| 6·69| | | +-----+-----+-----+-----+-----+-----+ | 25 | 2·52 | 6 | 1·06| 1·45| 2·59| 6·93| 6·93| | 30 | 2·46 | 7 | 1·07| 1·45| 2·80| 6·97| 6·98| | +---------+ | | | | | | | Mean.| 2·66 | 8 | 1·07| 1·46| 3·07| 6·87| 6·85| | -----+---------+ | | | | | | | |February.| 9 | 1·09| 1·52| 3·40| 6·87| 6·89| | 1 | 2·50 | 10 | 1·11| 1·75| 3·70| 6·77| 6·83| | | +-----+-----+-----+-----+-----+-----+ | 5 | 2·35 | 11 | 1·15| 1·88| 3·81| 6·70| 6·73| | 10 | 2·34 | 12 | 1·10| 1·97| 4·00| 6·68| 6·68| | 15 | 2·14 | 13 | 1·00| 2·00| 3·96| 6·65| 6·68| | 20 | 2·00 | 14 | 1·00| 2·00| 3·94| 6·64| 6·68| | 25 | 1·94 | 15 | 0·94| 1·97| 3·94| 6·66| 6·67| | | +-----+-----+-----+-----+-----+-----+ | 29 | 1·74 | 16 | 0·96| 1·97| 4·15| 6·60| | | +---------+ | | | | | | | Mean.| 2·14 | 17 | 0·96| 1·98| 4·35| 6·54| | | -----+---------+ | | | | | | | | March. | 18 | 0·98| 2·00| 4·60| 6·52| | | 1 | 1·67 | 19 | 0·98| 2·00| 4·78| 6·60| | | 5 | 1·65 | 20 | 1·02| 2·00| 4·84| 6·47| | | | +-----+-----+-----+-----+-----+ | | 10 | 1·52 | 21 | 1·09| 2·00| 5·03| 6·46| | | 15 | 1·37 | 22 | 1·15| 1·90| 5·12| 6·50| | | 20 | 1·29 | 23 | 1·17| 1·85| 5·00| 6·45| | | 25 | 1·22 | 24 | 1·15| 1·88| 5·00| 6·50| | | 30 | 1·17 | 25 | 1·09| 1·89| 5·08| 6·57| | | +---------+-----+-----+-----+-----+-----+ | | Mean.| 1·39 | 26 | 1·08| 1·90| 5·41| 6·48| | | -----+---------+ | | | | | | | | April. | 27 | 1·08| 1·91| 5·65| 6·48| | | 1 | 1·25 | 28 | 1·10| 1·92| 5·60| 6·45| | | 5 | 1·15 | 29 | 1·13| 1·93| 5·57| 6·69| | | 10 | 1·17 | 30 | 1·19| 1·93| 5·78| 6·83| | | | +-----+-----+-----+-----+-----+ | | 15 | 1·11 | 31 | 1·28| .. | 6·00| 6·79| | | | +-----+-----+-----+-----+-----+ | | 20 | 1·05 |Mean.| 1·08| 1·79| 4·13| 6·61| | | | +-----+-----+-----+-----+-----+ | | 25 | 1·12 | | | | | | | | 30 | 1·10 | | | | | | | | +---------+ | | | | | | | Mean.| 1·14 | | | | | | | | =====+=========+=====+=====+=====+=====+=====+=====+=====+========

TABLE LXV.--_Mean gauges of 30 years at Assuân._

1873-1902 =====+====+====+====+====+====+====+====+====+====+====+====+==== Date.|Jan.|Feb.|Mar.|Apr.|May.|Jun.|Jul.|Aug.|Sep.|Oct.|Nov.|Dec. -----+----+----+----+----+----+----+----+----+----+----+----+---- 1 |2·64|1·95|1·31|0·68|0·24|0·10|1·04|4·87|7·80|7·19|5·00|3·42 2 |2·61|1·93|1·29|0·65|0·24|0·11|1·08|5·01|7·82|7·10|4·90|3·39 3 |2·59|1·91|1·27|0·64|0·22|0·12|1·16|5·15|7·81|7·05|4·84|3·37 4 |2·57|1·89|1·25|0·63|0·21|0·12|1·21|5·25|7·82|6·96|4·79|3·32 5 |2·55|1·87|1·23|0·61|0·20|0·10|1·27|5·51|7·84|6·91|4·72|3·30 | | | | | | | | | | | | 6 |2·53|1·84|1·21|0·58|0·18|0·12|1·34|5·71|7·82|6·85|4·66|3·26 7 |2·51|1·82|1·18|0·56|0·17|0·13|1·41|5·94|7·82|6·77|4·54|3·24 8 |2·47|1·81|1·17|0·56|0·16|0·15|1·49|6·15|7·81|6·71|4·47|3·20 9 |2·46|1·78|1·15|0·54|0·14|0·17|1·57|6·38|7·81|6·66|4·37|3·19 10 |2·44|1·76|1·13|0·52|0·13|0·19|1·65|6·52|7·80|6·59|4·35|3·16 | | | | | | | | | | | | 11 |2·41|1·73|1·11|0·51|0·13|0·19|1·74|6·62|7·80|6·53|4·28|3·13 12 |2·39|1·71|1·08|0·49|0·13|0·22|1·81|6·70|7·83|6·47|4·22|3·10 13 |2·37|1·69|1·07|0·47|0·13|0·24|1·90|6·78|7·77|6·40|4·17|3·07 14 |2·34|1·66|1·05|0·46|0·13|0·27|1·97|6·92|7·76|6·33|4·10|3·03 15 |2·32|1·63|1·02|0·45|0·13|0·29|2·10|6·96|7·76|6·25|4·05|3·01 | | | | | | | | | | | | 16 |2·30|1·61|1·00|0·44|0·12|0·32|2·23|7·04|7·74|6·17|4·00|2·99 17 |2·28|1·59|0·98|0·42|0·12|0·34|2·36|7·11|7·71|6·07|3·96|2·95 18 |2·25|1·56|0·96|0·41|0·12|0·37|2·52|7·17|7·68|6·02|3·91|2·94 19 |2·22|1·54|0·93|0·40|0·11|0·39|2·65|7·27|7·69|5·98|3·86|2·91 20 |2·21|1·52|0·92|0·39|0·11|0·41|2·79|7·31|7·67|5·90|3·82|2·88 | | | | | | | | | | | | 21 |2·18|1·50|0·90|0·38|0·10|0·43|2·95|7·32|7·67|5·84|3·81|2·85 22 |2·16|1·47|0·88|0·36|0·10|0·47|3·11|7·35|7·63|5·78|3·75|2·82 23 |2·13|1·45|0·86|0·35|0·08|0·50|3·29|7·48|7·60|5·68|3·70|2·79 24 |2·13|1·45|0·83|0·34|0·08|0·56|3·46|7·55|7·56|5·61|3·63|2·77 25 |2·10|1·42|0·82|0·33|0·08|0·67|3·58|7·58|7·52|5·53|3·64|2·76 | | | | | | | | | | | | 26 |2·08|1·39|0·79|0·31|0·08|0·71|3·73|7·60|7·53|5·45|3·61|2·73 27 |2·05|1·38|0·77|0·29|0·08|0·79|3·94|7·66|7·43|5·37|3·57|2·68 28 |2·04|1·35|0·75|0·27|0·08|0·83|4·16|7·66|7·37|5·30|3·54|2·65 29 |2·02| |0·73|0·26|0·08|0·98|4·36|7·69|7·31|5·22|3·49|2·62 30 |1·99| |0·71|0·24|0·08|0·97|4·58|7·74|7·25|5·15|3·42|2·60 31 |1·96| |0·69| |0·09| |4·73|7·78| |5·07| |2·58 | | | | | | | | | | | | =====+====+====+====+====+====+====+====+====+====+====+====+====

Zero is R. L. 85·00 metres.

TABLE LXV. (continued).--_Assuân Gauges._

1874 =====+=========+=====+=====+=====+=====+=====+=====+=====+======== Date.| Month. |Date.| May.|June.|July.| Au- |Sept.|Date.|Month. | | | | | |gust.| | | -----+---------+-----+-----+-----+-----+-----+-----+-----+--------- |January. | | | | | | | |October. 1 | 2·06 | 1 |-0·41|-0·32| 1·50| 6·49| 8·70| 1 | 8·11 5 | 1·95 | 2 |-0·37|-0·10| 1·57| 6·65| 8·72| 5 | 7·89 10 | 1·75 | 3 |-0·37| 0·10| 1·61| 6·74| 8·83| 10 | 7·64 15 | 1·57 | 4 |-0·37| 0·26| 1·68| 6·81| 8·90| 15 | 7·21 20 | 1·41 | 5 |-0·39| 0·31| 1·72| 6·88| 8·95| 20 | 6·61 | +-----+-----+-----+-----+-----+-----+ | 25 | 1·23 | 6 |-0·44| 0·46| 1·81| 6·97| 8·97| 25 | 6·16 30 | 1·00 | 7 |-0·48| 0·58| 1·93| 6·97| 8·95| 30 | 5·68 +---------+ | | | | | | +-------- Mean.| 1·53 | 8 |-0·50| 0·71| 1·99| 6·97| 8·92|Mean.| 7·04 -----+---------+ | | | | | +-----+-------- |February.| 9 |-0·50| 0·82| 2·08| 7·06| 8·88| | Nov. 1 | 0·94 | 10 |-0·53| 0·87| 2·15| 7·35| 8·83| 1 | 5·48 | +-----+-----+-----+-----+-----+-----+ | 5 | 0·80 | 11 |-0·53| 0·87| 2·24| 7·75| 8·81| 5 | 5·19 10 | 0·67 | 12 |-0·53| 0·84| 2·38| 8·16| 8·77| 10 | 4·87 15 | 0·58 | 13 |-0·53| 0·82| 2·49| 8·36| 8·74| 15 | 4·58 20 | 0·44 | 14 |-0·55| 0·78| 2·52| 8·45| 8·74| 20 | 4·31 25 | 0·35 | 15 |-0·55| 0·71| 2·71| 8·47| 8·74| 25 | 4·17 | +-----+-----+-----+-----+-----+-----+ | 28 | 0·31 | 16 |-0·57| 0·67| 2·83| 8·43| 8·70| 30 | 4·00 +---------+ | | | | | | +-------- Mean.| 0·58 | 17 |-0·57| 0·67| 2·98| 8·36| 8·63|Mean.| 4·65 -----+---------+ | | | | | +-----+-------- | March. | 18 |-0·57| 0·64| 3·16| 8·43| 8·56| | Dec. 1 | 0·28 | 19 |-0·59| 0·64| 3·25| 8·50| 8·47| 1 | 3·95 5 | 0·26 | 20 |-0·59| 0·64| 3·37| 8·36| 8·43| 5 | 3·73 | +-----+-----+-----+-----+-----+-----+ | 10 | 0·19 | 21 |-0·61| 0·67| 3·43| 8·61| 8·41| 10 | 3·57 15 | 0·13 | 22 |-0·64| 0·73| 3·66| 8·68| 8·45| 15 | 3·41 20 | 0·04 | 23 |-0·64| 0·82| 4·02| 8·63| 8·45| 20 | 3·28 25 | -0·01 | 24 |-0·64| 0·94| 4·47| 8·65| 8·43| 25 | 3·16 30 | -0·08 | 25 |-0·64| 1·12| 4·87| 8·68| 8·38| 30 | 3·03 +---------+-----+-----+-----+-----+-----+-----+ +-------- Mean.| 0·11 | 26 |-0·66| 1·30| 5·21| 8·74| 8·34|Mean.| 3·45 -----+---------+ | | | | | +-----+-------- | April. | 27 |-0·66| 1·41| 5·46| 8·77| 8·32| | 1 | -0·12 | 28 |-0·66| 1·45| 5·77| 8·74| 8·27| | 5 | -0·26 | 29 |-0·66| 1·47| 6·07| 8·74| 8·20| | 10 | -0·30 | 30 |-0·61| 1·47| 6·20| 8·70| 8·16| | | +-----+-----+-----+-----+-----+-----+ | 15 | -0·32 | 31 |-0·50| .. | 6·31| 8·68| .. | | | +-----+-----+-----+-----+-----+-----+ | 20 | -0·39 |Mean.|-0·54| 0·74| 3·27| 8·00| 8·62| | | +-----+-----+-----+-----+-----+-----+ | 25 | -0·46 | | | | | | | | 30 | -0·46 | | | | | | | | -----+---------+ | | | | | | | Mean.| -0·34 | | | | | | | | =====+=========+=====+=====+=====+=====+=====+=====+=====+========

Zero is R. L. 85·00 metres.

1877 =====+=========+=====+=====+=====+=====+=====+=====+=====+======== Date.| Month. |Date.| May.|June.|July.| Au- |Sept.|Date.|Month. | | | | | |gust.| | | -----+---------+-----+-----+-----+-----+-----+-----+-----+-------- |January. | | | | | | | |October. 1 | 2·62 | 1 | 0·35| 0·19| 1·30| 4·72| 6·18| 1 | 6·04 5 | 2·54 | 2 | 0·37| 0·22| 1·48| 4·74| 6·20| 5 | 5·64 10 | 2·42 | 3 | 0·37| 0·24| 1·63| 4·74| 6·25| 10 | 5·21 15 | 2·26 | 4 | 0·35| 0·26| 1·75| 4·74| 6·27| 15 | 4·92 20 | 2·13 | 5 | 0·35| 0·28| 1·81| 4·88| 6·27| 20 | 4·63 | +-----+-----+-----+-----+-----+-----+ | 25 | 1·99 | 6 | 0·33| 0·31| 1·86| 4·85| 6·27| 25 | 4·53 30 | 1·81 | 7 | 0·33| 0·31| 1·90| 5·03| 6·22| 30 | 4·09 +---------+ | | | | | | +-------- Mean.| 2·25 | 8 | 0·35| 0·33| 1·97| 5·26| 6·18|Mean.| 5·01 -----+---------+ | | | | | +-----+-------- |February.| 9 | 0·40| 0·37| 2·04| 5·39| 6·11| |Novemb. 1 | 1·77 | 10 | 0·42| 0·46| 2·13| 5·35| 6·09| 1 | 3·88 | +-----+-----+-----+-----+-----+-----+ | 5 | 1·70 | 11 | 0·42| 0·55| 2·26| 5·37| 6·13| 5 | 3·73 10 | 1·57 | 12 | 0·40| 0·69| 2·44| 5·37| 6·16| 10 | 3·61 15 | 1·39 | 13 | 0·37| 0·80| 2·71| 5·41| 6·13| 15 | 3·41 20 | 1·25 | 14 | 0·33| 0·87| 3·01| 5·55| 6·07| 20 | 3·23 25 | 1·17 | 15 | 0·28| 0·91| 3·23| 5·75| 6·02| 25 | 2·94 | +-----+-----+-----+-----+-----+-----+ | 28 | 1·17 | 16 | 0·26| 0·96| 3·32| 6·07| 6·00| 30 | 2·67 +---------+ | | | | | | +-------- Mean.| 1·43 | 17 | 0·24| 1·03| 3·32| 6·18| 6·02|Mean.| 3·35 -----+---------+ | | | | | +-----+-------- | March. | 18 | 0·22| 1·07| 3·28| 6·22| 6·04| |Decemb. 1 | 1·14 | 19 | 0·17| 1·09| 3·21| 6·34| 6·00| 1 | 2·60 5 | 1·09 | 20 | 0·17| 1·09| 3·23| 6·40| 5·95| 5 | 2·51 | +-----+-----+-----+-----+-----+-----+ + 10 | 0·96 | 21 | 0·15| 1·09| 3·32| 6·29| 6·02| 10 | 2·40 15 | 0·78 | 22 | 0·15| 1·07| 3·46| 6·18| 6·11| 15 | 2·22 20 | 0·69 | 23 | 0·15| 1·07| 3·57| 6·13| 6·25| 20 | 2·13 25 | 0·58 | 24 | 0·15| 1·07| 3·64| 6·13| 6·27| 25 | 1·95 30 | 0·49 | 25 | 0·13| 1·07| 3·70| 6·13| 6·27| 30 | 1·97 +---------+-----+-----+-----+-----+-----+-----+ +-------- Mean.| 0·82 | 26 | 0·10| 1·05| 3·72| 6·11| 6·20|Mean.| 2·25 -----+---------+ | | | | | +-----+-------- | April. | 27 | 0·10| 1·05| 3·99| 6·13| 6·11| | 1 | 0·46 | 28 | 0·13| 1·07| 4·21| 6·18| 6·11| | 5 | 0·40 | 29 | 0·15| 1·09| 4·54| 6·18| 6·13| | 10 | 0·33 | 30 | 0·17| 1·16| 4·65| 6·18| 6·09| | | +-----+-----+-----+-----+-----+-----+ | 15 | 0·31 | 31 | 0·19| .. | 4·67| 6·16| .. | | | +-----+-----+-----+-----+-----+-----+ | 20 | 0·42 |Mean.| 0·26| 0·74| 2·94| 5·68| 6·13| | | +-----+-----+-----+-----+-----+-----+ | 25 | 0·51 | | | | | | | | 30 | 0·35 | | | | | | | | +---------+ | | | | | | | Mean.| 0·40 | | | | | | | | =====+=========+=====+=====+=====+=====+=====+=====+====+=========

Zero is R. L. 85·00 metres.

1878 =====+=========+=====+=====+=====+=====+=====+=====+=====+======== Date.| Month. |Date.| May.|June.|July.| Au- |Sept.|Date.|Month. | | | | | |gust.| | | -----+---------+-----+-----+-----+-----+-----+-----+-----+--------- |January. | | | | | | | |October. 1 | 1·97 | 1 |-0·41|-0·66| 0·67| 5·39| 7·60| 1 | 9·15 5 | 1·88 | 2 |-0·44|-0·66| 0·71| 5·46| 7·73| 5 | 8·92 10 | 1·75 | 3 |-0·46|-0·66| 0·78| 5·48| 7·89| 10 | 8·47 15 | 1·61 | 4 |-0·48|-0·66| 0·87| 5·55| 8·02| 15 | 7·91 20 | 1·48 | 5 |-0·48|-0·68| 0·91| 5·62| 8·14| 20 | 7·60 | +-----+-----+-----+-----+-----+-----+ | 25 | 1·39 | 6 |-0·46|-0·68| 0·96| 5·62| 8·23| 25 | 7·42 30 | 1·23 | 7 |-0·46|-0·71| 1·00| 5·53| 8·32| 30 | 6·83 +---------+ | | | | | | +-------- Mean.| 1·62 | 8 |-0·48|-0·71| 1·03| 5·41| 8·38|Mean.| 8·05 -----+---------+ | | | | | +-----+-------- |February.| 9 |-0·50|-0·71| 1·03| 5·68| 8·47| |Novem. 1 | 1·21 | 10 |-0·50|-0·68| 1·05| 6·25| 8·52| 1 | 6·72 | +-----+-----+-----+-----+-----+-----+ | 5 | 1·07 | 11 |-0·50|-0·66| 1·07| 6·31| 8·56| 5 | 6·34 10 | 0·91 | 12 |-0·50|-0·66| 1·12| 6·72| 8·70| 10 | 5·86 15 | 0·80 | 13 |-0·48|-0·66| 1·18| 6·88| 8·81| 15 | 5·50 20 | 0·67 | 14 |-0·48|-0·66| 1·27| 7·06| 8·86| 20 | 5·17 25 | 0·51 | 15 |-0·50|-0·66| 1·44| 7·17| 8·90| 25 | 4·92 | +-----+-----+-----+-----+-----+-----+ | 28 | 0·46 | 16 |-0·50|-0·64| 1·70| 7·17| 8·86| 30 | 4·69 +---------+ | | | | | | +-------- Mean.| 0·80 | 17 |-0·50|-0·61| 1·97| 7·10| 8·83|Mean.| 5·60 -----+---------+ | | | | | +-----+-------- |March | 18 |-0·53|-0·59| 2·17| 7·12| 8·83| |Decem. 1 | 0·44 | 19 |-0·55|-0·59| 2·33| 7·26| 8·81| 1 | 4·67 5 | 0·33 | 20 |-0·57|-0·59| 2·47| 7·48| 8·86| 5 | 4·57 | +-----+-----+-----+-----------+-----+ | 10 | 0·24 | 21 |-0·57|-0·61| 2·76| 7·73| 8·86| 10 | 4·38 15 | 0·17 | 22 |-0·57|-0·61| 2·98| 7·89| 8·81| 15 | 4·20 20 | 0·08 | 23 |-0·59|-0·59| 3·33| 7·96| 8·86| 20 | 4·09 25 | -0·03 | 24 |-0·61|-0·50| 3·48| 8·02| 8·92| 25 | 3·93 30 | -0·05 | 25 |-0·64|-0·32| 3·82| 8·07| 8·99| 30 | 3·77 +---------+-----+-----+-----+-----+-----+-----+ +-------- Mean.| 0·17 | 26 |-0·64|-0·05| 4·22| 8·09| 8·97|Mean.| 4·23 -----+---------+ | | | | | +-----+-------- |April. | 27 |-0·64| 0·19| 4·45| 7·91| 8·92| | 1 | -0·10 | 28 |-0·66| 0·40| 4·63| 7·69| 9·01| | 5 | -0·12 | 29 |-0·68| 0·58| 4·78| 7·57| 9·08| | 10 | -0·19 | 30 |-0·68| 0·64| 4·96| 7·53| 9·13| | | +-----+-----+-----+-----+-----+-----+ | 15 | -0·26 | 31 |-0·68| .. | 5·21| 7·55| .. | | | +-----+-----+-----+-----+-----+-----+ | 20 | -0·26 |Mean.|-0·56|-0·47| 2·27| 6·85| 8·63| | | +-----+-----+-----+-----+-----+-----+ | 25 | -0·37 | | | | | | | | 30 | -0·41 | | | | | | | | +---------+ | | | | | | | Mean.| -0·25 | | | | | | | | | | | | | | | | | =====+=========+=====+=====+=====+=====+=====+=====+=====+========

Zero is R. L. 85·00 metres.

1902 =====+=========+=====+=====+=====+=====+=====+=====+=====+======== Date.| Month. |Date.| May.|June.|July.| Au- |Sept.|Date.|Month. | | | | | |gust.| | | -----+---------+-----+-----+-----+-----+-----+-----+-----+-------- |January. | | | | | | | |October. 1 | 1·86 | 1 |-0·39|-0·46| 0·42| 2·56| 6·16| 1 | 6·20 5 | 1·79 | 2 |-0·39|-0·48| 0·49| 2·65| 6·13| 5 | 6·00 10 | 1·61 | 3 |-0·39|-0·50| 0·49| 2·69| 6·09| 10 | 5·89 15 | 1·41 | 4 |-0·37|-0·53| 0·49| 2·76| 6·09| 15 | 5·64 20 | 1·21 | 5 |-0·39|-0·55| 0·49| 2·83| 6·20| 20 | 5·30 | +-----+-----+-----+-----+-----+-----+ | 25 | 0·98 | 6 |-0·41|-0·57| 0·46| 2·92| 6·38| 25 | 4·67 30 | 0·85 | 7 |-0·41|-0·52| 0·46| 3·03| 6·45| 30 | 4·09 +---------+ | | | | | | +-------- Mean.| 1·38 | 8 |-0·43|-0·52| 0·49| 3·10| 6·45|Mean.| 5·40 -----+---------+ | | | | | +-----+-------- |February.| 9 |-0·46|-0·50| 0·56| 3·16| 6·40| | Nov. 1 | 0·78 | 10 |-0·46|-0·46| 0·65| 3·25| 6·36| 1 | 3·97 | +-----+-----+-----+-----+-----+-----+ | 5 | 0·67 | 11 |-0·46|-0·37| 0·83| 3·41| 6·31| 5 | 3·77 10 | 0·62 | 12 |-0·48|-0·35| 0·87| 3·66| 6·36| 10 | 3·37 15 | 0·49 | 13 |-0·48|-0·30| 0·94| 4·00| 6·37| 15 | 3·10 20 | 0·42 | 14 |-0·48|-0·30| 0·96| 4·29| 6·47| 20 | 2·85 25 | 0·33 | 15 |-0·46|-0·26| 1·01| 4·42| 6·58| 25 | 2·60 | +-----+-----+-----+-----+-----+-----+ | 28 | 0·26 | 16 |-0·43|-0·30| 1·07| 4·56| 6·65| 30 | 2·30 +---------+ | | | | | | +-------- Mean.| 0·51 | 17 |-0·41|-0·23| 1·23| 4·67| 6·72|Mean.| 3·15 -----+---------+ | | | | | +-----+-------- | March. | 18 |-0·39|-0·21| 1·39| 4·78| 6·72| | Dec. 1 | 0·22 | 19 |-0·39|-0·28| 1·54| 4·87| 6·65| 1 | 2·33 5 | 0·15 | 20 |-0·39|-0·30| 1·61| 4·94| 6·58| 5 | 2·31 | +-----+-----+-----+-----+-----+-----+ | 10 | 0·10 | 21 |-0·41|-0·32| 1·66| 5·08| 6·58| 10 | 2·15 15 | 0·01 | 22 |-0·39|-0·32| 1·70| 5·28| 6·61| 15 | 2·04 20 | -0·08 | 23 |-0·37|-0·30| 1·77| 5·39| 6·58| 20 | 1·81 25 | -0·17 | 24 |-0·39|-0·23| 1·87| 5·42| 6·52| 25 | 1·79 30 | -0·21 | 25 |-0·39|-O·16| 1·97| 5·37| 6·47| 30 | 1·55 +---------+-----+-----+-----+-----+-----+-----+ +-------- Mean.| 0·00 | 26 |-0·39|-0·05| 2·08| 5·32| 6·43|Mean.| 2·00 -----+---------+ | | | | | +-----+-------- | April. | 27 |-0·41| 0·11| 2·20| 5·32| 6·36| | 1 | -0·21 | 28 |-0·43| 0·20| 2·29| 5·44| 6·31| | 5 | -0·23 | 29 |-0·43| 0·24| 2·38| 5·71| 6·27| | 10 | -0·30 | 30 |-O·46| 0·33| 2·45| 5·96| 6·23| | | +-----+-----+-----+-----+-----+-----+ | 15 | -0·26 | 31 |-0·46| .. | 2·54| 6·11| .. | | | +-----+-----+-----+-----+-----+-----+ | 20 | -0·23 | Mean|-0·42|-0·28| 1·27| 4·29| 6·41| | | +-----+-----+-----+-----+-----+-----+ | 25 | -0·30 | | | | | | | | 30 | -0·39 | | | | | | | | +---------+ | | | | | | | Mean.| -0·27 | | | | | | | | =====+=========+=====+=====+=====+=====+=====+=====+=====+========

Zero is R. L. 85·00 metres.

1903 =====+=========+=====+=====+=====+=====+=====+=====+=====+======== Date.| Month. |Date.| May.|June.|July.| Au- |Sept.|Date.|Month. | | | | | |gust.| | | -----+---------+-----+-----+-----+-----+-----+-----+-----+-------- | January.| | | | | | | |October. 1 | 1·52 | 1 |-0·62|-0·19| 1·07| 3·14| 7·37| 1 | 7·30 5 | 1·66 | 2 |-0·64|-0·19| 1·16| 3·21| 7·39| 5 | 7·06 10 | 1·34 | 3 |-0·62|-0·19| 1·27| 3·32| 7·35| 10 | 6·58 15 | 1·36 | 4 |-0·59|+0-01| 1·39| 3·52| 7·39| 15 | 6·40 20 | 1·32 | 5 |-0·52|-0·05| 1·48| 3·77| 7·53| 20 | 6·07 | +-----+-----+-----+-----+-----+-----+ | 25 | 1·07 | 6 |-0·52|-0·03| 1·52| 3·95| 7·58| 25 | 5·55 30 | 1·07 | 7 |-0·50|+0·01| 1·52| 4·11| 7·56| 30 | 5·30 +---------+ | | | | | | +-------- Mean.| 1·33 | 8 |-0·57| 0·01| 1·52| 4·13| 7·62|Mean.| 6·32 -----+---------+ | | | | | +-----+-------- | February| 9 |-0·57|-0·03| 1·52| 4·11| 7·02| |Novemb. 1 | 0·85 | 10 |-0·57|-0·01| 1·55| 4·09| 7·62| 1 | 5·46 | +-----+-----+-----+-----+-----+-----+ 5 | 5·15 5 | 0·82 | 11 |-0·59| 0·01| 1·57| 4·13| 7·68| | 10 | 0·73 | 12 |-0·59| 0·01| 1·59| 4·34| 7·75| 10 | 4·67 15 | 0·51 | 13 |-0·59| 0·06| 1·59| 4·90| 7·75| 15 | 4·25 20 | 0·40 | 14 |-0·64| 0·08| 1·66| 5·44| 7·73| 20 | 4·06 25 | 0·28 | 15 |-0·55| 0·13| 1·68| 5·73| 7·66| 25 | 3·52 | +-----+-----+-----+-----+-----+-----+ | 28 | 0·06 | 16 |-0·55| 0·20| 1·72| 5·91| 7·64| 30 | 3·21 +---------+ | | | | | | +-------- Mean.| 0·52 | 17 |-0·55| 0·20| 1·75| 6·04| 7·62|Mean.| 4·33 -----+---------+ | | | | | +-----+-------- | March. | 18 |-0·57| 0·74| 1·82| 6·13| 7·58| |Decemb. 1 | 0·06 | 19 |-0·57| 0·94| 1·91| 6·34| 7·55| 1 | 3·16 5 | 0·10 | 20 |-0·55| 1·10| 2·02| 6·65| 7·48| 5 | 3·03 | +-----+-----+-----+-----+-----+-----+ | 10 | 0·10 | 21 |-0·48| 1·12| 2·18| 7·01| 7·42| 10 | 2·71 15 | -0·03 | 22 |-0·28| 1·23| 2·33| 7·21| 7·35| 15 | 2·51 20 | -0·05 | 23 |-0·28| 1·34| 2·44| 7·39| 7·35| 20 | 2·33 25 | -0·26 | 24 |-0·21| 1·14| 2·47| 7·49| 7·28| 25 | 2·31 30 | -0·28 | 25 |-0·35| 1·12| 2·56| 7·66| 7·33| 30 | 2·15 +---------+-----+-----|-----+-----+-----+-----+ +-------- Mean.| -0·05 | 26 |-0·35| 1·27| 2·69| 7·82| 7·35|Mean.| 2·60 -----+---------+ | | | | | +-----+-------- | April. | 27 |-0·37| 1·30| 2·85| 7·93| 7·35| | 1 | -0·28 | 28 |-0·37| 0·92| 2·96| 7·84| 7·33| | 5 | -0·23 | 29 |-0·34| 0·92| 3·03| 7·66| 7·35| | 10 | -0·39 | 30 |-0·28| 0·98| 3·07| 7·53| 7·33| | | +-----+-----+-----+-----+-----+-----+ | 15 | -0·48 | 31 |-0·14| .. | 3·12| 7·46| .. | | | |-----+-----+-----+-----+-----+-----+ | 20 | -0·39 | Mean|-0·48| 0·47| 1·97| 5·68| 7·50| | | +-----+-----+-----+-----+-----+-----+ | 25 | -0·59 | | | | | | | | 30 | -0·62 | | | | | | | | +---------+ | | | | | | | Mean.| -0·43 | | | | | | | | =====+=========+=====+=====+=====+=====+=====+=====+=====+========

Zero is R. L. 85·00 metres.

1904 =====+=========+=====+=====+=====+=====+=====+=====+=====+======== Date.| Month. |Date.| May.|June.|July.| Au- |Sept.|Date.|Month. | | | | | |gust.| | | -----+---------+-----+-----+-----+-----+-----+-----+-----+-------- |January. | | | | | | | |October. 1 | 2·11 | 1 |-0·08| 0·26| 0·94| 4·45| 6·34| 1 | .. 5 | 2·13 | 2 |-0·12| 0·28| 0·89| 4·49| 6·34| 5 | .. 10 | 1·95 | 3 |-0·14| 0·28| 0·87| 4·60| 6·27| 10 | .. 15 | 1·86 | 4 |-0·21| 0·28| 0·87| 4·87| 6·27| 15 | .. 20 | 1·79 | 5 |-0·21| 0·28| 0·85| 5·10| 6·47| 20 | .. | +-----+-----+-----+-----+-----+-----+ | 25 | 1·68 | 6 |-0·19| 0·33| 0·83| 5·28| 6·61| 25 | .. 30 | 1·57 | 7 |-0·19| 0·60| 0·83| 5·50| 6·63| 30 | .. +---------+ | | | | | | +-------- Mean.| 1·87 | 8 |-0·17| 0·65| 0·83| 5·84| 6·58|Mean.| .. -----+---------+ | | | | | +-----+-------- |February.| 9 |-0·14| 0·67| 0·80| 6·11| 6·52| | Novem. 1 | 1·57 | 10 |-0·14| 0·69| 0·78| 6·38| 6·47| 1 | .. | +-----+-----+-----+-----+-----+-----+ | 5 | 1·52 | 11 |-0·05| 0·71| 0·78| 6·63| 6·52| 5 | .. 10 | 1·43 | 12 |+0·14| 0·85| 0·78| 6·85| 6·58| 10 | .. 15 | 1·36 | 13 | 0·04| 0·89| 0·78| 6·97| 6·74| 15 | .. 20 | 1·29 | 14 | 0·01| 0·94| 0·80| 6·92| 6·88| 20 | .. 25 | 1·27 | 15 |-0·05| 0·92| 0·83| 6·85| 6·83| 25 | .. | +-----+-----+-----+-----+-----+-----+ | 28 | 1·17 | 16 |-0·05| 0·96| 0·87| 6·74| .. | 30 | .. +---------+ | | | | | | +-------- Mean.| 1·37 | 17 |-0·05| 1·05| 0·94| 6·65| .. |Mean.| .. -----+---------+ | | | | | +-----+-------- | March. | 18 |-0·05| 1·14| 1·03| 6·61| .. | | Decem. 1 | 1·03 | 19 |-0·05| 1·18| 1·28| 6·56| .. | 1 | .. 5 | 0·74 | 20 |-0·05| 1·23| 1·61| 6·54| .. | 5 | .. | +-----+-----+-----+-----+-----+-----+ | 10 | 0·71 | 21 | 0·15| 1·21| 2·15| 6·54| .. | 10 | .. 15 | 0·69 | 22 | 0·10| 1·21| 2·62| 6.49| .. | 15 | .. 20 | 0·46 | 23 | 0·13| 1·18| 2·92| 6·47| .. | 20 | .. 25 | 0·42 | 24 | 0·13| 1·21| 3·08| 6·43| .. | 25 | .. 30 | 0·20 | 25 | 0·15| 1·16| 3·16| 6·40| .. | 30 | .. +---------+-----+-----+-----+-----+-----+-----+ +-------- Mean.| 0·60 | 26 | 0·13| 1·14| 3·23| 6·43| .. |Mean.| .. -----+---------+ | | | | | +-----+-------- | April. | 27 | 0·10| 1·16| 3·43| 6·36| .. | | 1 | 0·13 | 28 | 0·10| 1·21| 3·70| 6·34| .. | | 5 | -0·10 | 29 | 0·06| 1·12| 4·02| 6·27| .. | | 10 | -0·12 | 30 | 0·06| 1·07| 4·27| 6·25| .. | | | +-----+-----+-----+-----+-----+-----+ | 15 | 0·04 | 31 | 0·04| .. | 4·42| 6·29| .. | | | +-----+-----+-----+-----+-----+-----+ | 20 | 0·06 |Mean.|-0·02| 0·86| 1·78| 6·14| .. | | | +-----+-----+-----+-----+-----+-----+ | 25 | 0·04 | | | | | | | | 30 | -0·03 | | | | | | | | +---------+ | | | | | | | Mean.| 0·00 | | | | | | | | =====+=========+=====+=====+=====+=====+=====+=====+=====+========

Zero is R. L. 85·00 metres.

TABLE LXVI.--_Assuân Reservoir gauges._

R. L. OF ZERO 85·00 METRES.

=====+=====+=====+=====+=====+=====+=====+=====+ Year.|Date.| Jan.| Feb.| Mar.| Apr.| May | Jun.| -----+-----+-----+-----+-----+-----+-----+-----+ 1902 | 1 | .. | .. | .. | .. | .. | .. | | 5 | .. | .. | .. | .. | .. | .. | | 10 | .. | .. | .. | .. | .. | .. | | 15 | .. | .. | .. | .. | .. | .. | -----+-----+-----+-----+-----+-----+-----+-----+ | 20 | .. | .. | .. | .. | .. | .. | | 25 | .. | .. | .. | .. | .. | .. | | 30 | .. | .. | .. | .. | .. | .. | -----+-----+-----+-----+-----+-----+-----+-----+ |Mean | .. | .. | .. | .. | .. | .. | -----+-----+-----+-----+-----+-----+-----+-----+ 1903 | 1 |20·30|21·00|21·05|20·67|19·76|17·63| | 5 |20·38|21·13|21·09|20·55|19·63|16·85| | 10 |20·41|21·06|21·00|20·34|19·39|15·69| | 15 |20·61|21·03|20·92|20·19|19·18|14·41| -----+-----+-----+-----+-----+-----+-----+-----+ | 20 |20·67|21·06|20·79|19·99|18·98|12·42| | 25 |20·86|21·00|20·75|19·89|18·48| 9·43| | 30 |20·96|21·03|20·68|19·72|17·97| 7·07| -----+-----+-----+-----+-----+-----+-----+-----+ |Mean |20·60|21·04|20·90|20·19|19·05|13·47| -----+-----+-----+-----+-----+-----+-----+-----+ 1904 | 1 |16·29|19·18|20·44|20·91|20·94|19·66| | 5 |16·80|19·42|20·72|21·00|20·99|19·06| | 10 |17·37|19·70|21·01|21·15|21·09|17·97| | 15 |17·81|20·00|20·96|21·25|20·91|16·22| -----+-----+-----+-----+-----+-----+-----+-----+ | 20 |18·26|20·28|21·01|21·16|20·73|13·84| | 25 |18·66|20·37|20·94|21·06|20·33|10·26| | 30 |19·13|20·41|20·90|20·96|19·83| 6·56| -----+-----+-----+-----+-----+-----+-----+-----+ |Mean |17·76|19·91|20·85|21·07|20·69|14·80| =====+=====+=====+=====+=====+=====+=====+=====+

=====+=====+=====+=====+=====+=====+=====+===== Year.|Date.| Jul.| Aug.| Sep.| Oct.| Nov.| Dec. -----+-----+-----+-----+-----+-----+-----+----- 1902 | 1 | .. | .. | .. | .. |12·80|17·77 | 5 | .. | .. | .. | .. |13·72|18·16 | 10 | .. | .. | .. | .. |14·91|18·59 | 15 | .. | .. | .. | .. |15·73|19·02 -----+-----+-----+-----+-----+-----+-----+----- | 20 | .. | .. | .. | 9·90|16·58|19·39 | 25 | .. | .. | .. |10·98|17·18|19·77 | 30 | .. | .. | .. |12·50|17·67|20·25 -----+-----+-----+-----+-----+-----+-----+----- |Mean | .. | .. | .. | .. |15·51|19·00 -----+-----+-----+-----+-----+-----+-----+----- 1903 | 1 | .. | .. | .. | .. | .. |10·56 | 5 | .. | .. | .. | .. | .. |10·53 | 10 | .. | .. | .. | .. |10·63|12·10 | 15 | .. | .. | .. | .. |10·53|13·33 -----+-----+-----+-----+-----+-----+-----+----- | 20 | .. | .. | .. | .. | 6·90|14·49 | 25 | .. | .. | .. | .. |10·59|15·18 | 30 | .. | .. | .. | .. |10·57|16·14 -----+-----+-----+-----+-----+-----+-----+----- |Mean | .. | .. | .. | .. | .. |13·19 -----+-----+-----+-----+-----+-----+-----+----- 1904 | 1 | .. | .. | .. | .. | .. | .. | 5 | .. | .. | .. | .. | .. | .. | 10 | .. | .. | .. | .. | .. | .. | 15 | .. | .. | .. | .. | .. | .. -----+-----+-----+-----+-----+-----+-----+----- | 20 | .. | .. | .. | .. | .. | .. | 25 | .. | .. | .. | .. | .. | .. | 30 | .. | .. | .. | .. | .. | .. -----+-----+-----+-----+-----+-----+-----+----- |Mean | .. | .. | .. | .. | .. | .. =====+=====+=====+=====+=====+=====+=====+=====

Zero is R. L. 85·00 metres.

TABLE LXVII.--_Cairo gauges_. (_Roda island_).

Mean of 20 years 1873-1892.

=====+=====+====+====+====+====+====+====+====+====+====+====+====+==== Year.|Date.|Jan.|Feb.|Mar.|Apr.|May.|Jun.|Jul.|Aug.|Sep.|Oct.|Nov.|Dec. -----+-----+----+----+----+----+----+----+----+----+----+----+----+---- | 5 | 2·8| 2·2| 1·8| 1·5| 1·1| 0·9| 1·1| 4·1| 6·5| 6·9| 5·6| 3·6 | 10 | 2·7| 2·2| 1·8| 1·4| 1·1| 0·9| 1·3| 4·9| 6·7| 6·9| 5·1| 3·4 | 15 | 2·6| 2·1| 1·7| 1·3| 1·1| 0·9| 1·5| 5·7| 6·8| 6·8| 4·7| 3·3 | 20 | 2·5| 2·0| 1·6| 1·3| 1·1| 0·9| 1·8| 5·9| 6·9| 6·8| 4·3| 3·2 | 25 | 2·4| 1·9| 1·6| 1·2| 1·0| 1·0| 2·2| 6·2| 7·0| 6·7| 4·0| 3·0 |End. | 2·3| 1·9| 1·5| 1·2| 1·0| 1·1| 2·9| 6·4| 7·1| 6·2| 3·8| 2·9 -----+-----+----+----+----+----+----+----+----+----+----+----+----+---- 1877 | 5 | 2·7| 2·2| 1·5| 1·3| 1·1| 0·7| 1·2| 3·6| 5·2| 5·2| 3·9| 2·9 | 10 | 2·7| 2·1| 1·4| 1·3| 1·0| 0·7| 1·2| 4·0| 5·3| 5·0| 3·6| 2·7 | 15 | 2·6| 1·9| 1·4| 1·2| 1·0| 0·7| 1·4| 4·7| 5·2| 4·9| 3·7| 2·6 +-----+----+----+----+----+----+----+----+----+----+----+----+---- | 20 | 2·6| 1·8| 1·3| 1·1| 1·0| 0·8| 1·6| 4·6| 5·2| 4·6| 3·7| 2·5 | 25 | 2·5| 1·7| 1·4| 1·1| 1·0| 1·0| 2·4| 5·3| 5·1| 4·4| 3·5| 2·4 |End. | 2·3| 1·7| 1·4| 1·0| 1·9| 1·3| 2·8| 5·3| 5·3| 4·2| 3·1| 2·3 +-----+----+----+----+----+----+----+----+----+----+----+----+---- |Mean.| 2·6| 1·9| 1·4| 1·2| 1·0| 0·9| 1·8| 4·6| 5·2| 4·7| 3·6| 2·6 -----+-----+----+----+----+----+----+----+----+----+----+----+----+---- 1878 | 5 | 2·2| 1·6| 1·0| 0·6| 0·3| 0·0|-0·2| 4·1| 6·5| 8·4| 7·5| 4·9 | 10 | 2·1| 1·5| 0·9| 0·6| 0·2| 0·0| 0·4| 4·9| 6·8| 8·7| 7·4| 4·7 | 15 | 2·1| 1·3| 0·9| 0·5| 0·2| 0·0| 0·8| 5·4| 7·2| 8·4| 6·9| 4·5 +-----+----+----+----+----+----+----+----+----+----+----+----+---- | 20 | 1·9| 1·2| 1·0| 0·5| 0·2|-0·2| 1·0| 6·0| 7·6| 8·1| 6·2| 4·4 | 25 | 1·8| 1·1| 0·8| 0·4| 0·1|-0·2| 1·4| 6·3| 7·9| 7·9| 5·5| 4·2 |End. | 1·7| 1·1| 0·8| 0·3| 0·0|-0·2| 2·6| 6·6| 8·2| 7·7| 5·5| 4·0 +-----+----+----+----+----+----+----+----+----+----+----+----+---- |Mean.| 1·9| 1·3| 0·9| 0·5| 0·2|-0·1| 1·0| 5·5| 7·4| 8·2| 6·5| 4·4 -----+-----+----+----+----+----+----+----+----+----+----+----+----+---- 1879 | 5 | 3·7| 3·2| 2·7| 2·5| 2·2| 2·0| 2·1| 5·1| 7·1| 7·9| 5·9| 4·4 | 10 | 3·6| 3·0| 2·7| 2·5| 2·2| 2·1| 2·1| 5·9| 7·0| 7·5| 5·4| 4·0 | 15 | 3·5| 2·9| 2·6| 2·5| 2·2| 2·3| 2·6| 6·5| 7·2| 7·6| 5·0| 3·8 +-----+----+----+----+----+----+----+----+----+----+----+----+---- | 20 | 3·4| 2·9| 2·6| 2·4| 2·1| 2·2| 3·5| 6·9| 7·7| 7·4| 4·7| 3·7 | 25 | 3·3| 2·8| 2·5| 2·3| 2·1| 2·2| 3·9| 7·0| 8·0| 7·3| 4·5| 3·5 |End. | 3·2| 2·8| 2·5| 2·3| 2·0| 2·1| 4·9| 7·1| 8·1| 6·6| 4·3| 3·5 +-----+----+----+----+----+----+----+----+----+----+----+----+---- |Mean.| 3·5| 2·9| 2·6| 2·4| 2·1| 2·1| 3·2| 6·4| 7·5| 7·4| 5·0| 3·8 =====+=====+====+====+====+====+====+====+====+====+====+====+====+====

Referred to zero as R. L. 12·25.

TABLE LXVII. (continued).--_Cairo gauges_ (_Roda island_).

1902 =====+=========+=====+=====+=====+=====+=====+=====+=====+======== Date.| Month. |Date.| May.|June.|July.| Au- |Sept.|Date.| Month. | | | | | |gust.| | | -----+---------+-----+-----+-----+-----+-----+-----+-----+-------- |January. | | | | | | | |October. 1 | 2·78 | 1 | 2·08| 1·73| 1·79| 3·66| 4·87| 1 | 5·68 5 | 2·74 | 2 | 2·07| 1·75| 1·78| 3·61| 4·92| 5 | 5·60 10 | 2·68 | 3 | 2·02| 1·75| 1·76| 3·64| 5·01| 10 | 5·51 15 | 2·49 | 4 | 2·00| 1·78| 1·75| 3·64| 5·14| 15 | 5·57 20 | 2·25 | 5 | 2·00| 1·80| 1·75| 3·66| 5·23| 20 | 5·66 | +-----+-----+-----+-----+-----+-----+ | 25 | 2·16 | 6 | 2·00| 1·80| 1·76| 3·66| 5·28| 25 | 5·50 30 | 2·27 | 7 | 2·00| 1·80| 1·79| 3·68| 5·30| 30 | 5·22 +---------+ | | | | | | +-------- Mean.| 2·45 | 8 | 1·98| 1·82| 1·88| 3·72| 5·30|Mean.| 5·53 -----+---------+ | | | | | +-----+-------- |February.| 9 | 1·99| 1·83| 1·98| 3·77| 5·35| | Nov. 1 | 2·27 | 10 | 1·99| 1·82| 2·07| 3·80| 5·41| 1 | 5·11 | +-----+-----+-----+-----+-----+-----+ | 5 | 2·25 | 11 | 1·98| 1·80| 2·16| 3·81| 5·49| 5 | 4·96 10 | 2·20 | 12 | 1·98| 1·80| 2·25| 3·84| 5·54| 10 | 4·65 15 | 2·20 | 13 | 1·96| 1·81| 2·32| 3·86| 5·55| 15 | 4·44 20 | 2·27 | 14 | 1·96| 1·80| 2·38| 3·88| 5·53| 20 | 4·38 25 | 2·22 | 15 | 1·94| 1·80| 2·41| 3·90| 5·52| 25 | 3·95 | +-----+-----+-----+-----+-----+-----+ | 28 | 2·37 | 16 | 1·94| 1·79| 2·47| 3·93| 5·53| 30 | 3·91 +---------+ | | | | | | +-------- Mean.| 2·25 | 17 | 1·91| 1·78| 2·50| 3·95| 5·55|Mean.| 4·49 -----+---------+ | | | | | +-----+-------- | March. | 18 | 1·86| 1·76| 2·52| 3·97| 5·56| | Dec. 1 | 2·37 | 19 | 1·86| 1·71| 2·56| 4·02| 5·58| 1 | 3·93 5 | 2·32 | 20 | 1·86| 1·68| 2·58| 4·13| 5·64| 5 | 3·70 | +-----+-----+-----+-----+-----+-----+ | 10 | 2·30 | 21 | 1·86| 1·66| 2·64| 4·26| 5·67| 10 | 3·29 15 | 2·34 | 22 | 1·84| 1·64| 2·70| 4·33| 5·74| 15 | 3·05 20 | 2·30 | 23 | 1·82| 1·66| 2·82| 4·40| 5·77| 20 | 3·05 25 | 2·29 | 24 | 1·82| 1·69| 2·94| 4·47| 5·77| 25 | 2·95 30 | 2·29 | 25 | 1·80| 1·71| 3·05| 4·51| 5·77| 30 | 2·78 +---------+-----+-----+-----+-----+-----+-----+ +-------- Mean.| 2·32 | 26 | 1·80| 1·76| 3·13| 4·58| 5·71|Mean.| 3·25 -----+---------+ | | | | | +-------+------ | April. | 27 | 1·78| 1·78| 3·23| 4·65| 5·70| | 1 | 2·29 | 28 | 1·78| 1·80| 3·35| 4·72| 5·69| | 5 | 2·27 | 29 | 1·77| 1·80| 3·50| 4·79| 5·69| | 10 | 2·09 | 30 | 1·75| 1·80| 3·54| 4·83| 5·68| | | +-----+-----+-----+-----+-----+-----+ | 15 | 2·12 | 31 | 1·74| .. | 3·57| 4·85| .. | | | +-----+-----+-----+-----+-----+-----+ | 20 | 2·12 |Mean.| 1·92| 1·76| 2·45| 4·07| 5·44| | | +-----+-----+-----+-----+-----+-----+ | 25 | 2·07 | | | | | | | | 30 | 2·08 | | | | | | | | +---------+ | | | | | | | Mean.| 2·15 | | | | | | | | =====+=========+=====+=====+=====+=====+=====+=====+=====+========

Zero is R. L. 12·25 metres.

1903 =====+=========+=====+=====+=====+=====+=====+=====+=====+======== Date.| Month. |Date.| May.|June.|July.| Au- |Sept.|Date.| Month. | | | | | |gust.| | | -----+---------+-----+-----+-----+-----+-----+-----+-----+-------- |January. | | | | | | | |October. 1 | 2·78 | 1 | 2·03| 1·87| 3·25| 3·73| 6·18| 1 | 6·19 5 | 2·69 | 2 | 2·02| 1·93| 3·48| 3·76| 6·11| 5 | 6·34 10 | 2·64 | 3 | 2·00| 1·96| 3·55| 3·76| 6·11| 10 | 6·63 15 | 2·67 | 4 | 2·00| 1·98| 3·54| 3·78| 6·09| 15 | 6·61 20 | 2·51 | 5 | 1·96| 1·98| 3·59| 3·80| 6·06| 20 | 6·72 | +-----+-----+-----+-----+-----+-----+ | 25 | 2·43 | 6 | 1·93| 1·98| 3·57| 3·84| 6·04| 25 | 6·90 30 | 2·36 | 7 | 1·89| 1·98| 3·54| 3·89| 6·02| 30 | 5·91 +---------+ | | | | | | +-------- Mean.| 2·56 | 8 | 1·84| 1·99| 3·57| 3·89| 6·05|Mean.| 6·47 -----+---------+ | | | | | +-----+-------- |February.| 9 | 1·81| 2·00| 3·54| 3·91| 6·07| | Nov. 1 | .. | 10 | 1·79| 2·03| 3·55| 3·92| 6·14| 1 | 6·18 | +-----+-----+-----+-----+-----+-----+ | 5 | 2·47 | 11 | 1·77| 2·06| 3·57| 3·94| 6·18| 5 | 6·15 10 | 2·43 | 12 | 1·79| 2·06| 3·57| 4·02| 6·21| 10 | 5·90 15 | 2·38 | 13 | 1·79| 2·07| 3·57| 4·06| 6·25| 15 | 5·23 20 | 2·38 | 14 | 1·77| 2·08| 3·59| 4·19| 5·27| 20 | 4·67 25 | 2·33 | 15 | 1·75| 2·10| 3·60| 4·24| 6·29| 25 | 4·50 | +-----+-----+-----+-----+-----+-----+ | 28 | 2·30 | 16 | 1·79| 2·16| 3·62| 4·33| 6·33| 30 | 4·26 +---------+ | | | | | | +-------- Mean.| 2·38 | 17 | 1·79| 2·20| 3·64| 4·40| 6·36|Mean.| 5·27 -----+---------+ | | | | | +-----+-------- | March. | 18 | .. | 2·20| 3·66| 4·49| 6·39| | Dec. 1 | 2·29 | 19 | .. | 2·25| 3·64| 4·69| 6·41| 1 | 4·22 5 | 2·24 | 20 | 1·75| 2·32| 3·68| 4·89| 6·41| 5 | 4·08 | +-----+-----+-----+-----+-----+-----+ | 10 | 2·36 | 21 | 1·75| 2·36| 3·64| 5·03| 6·39| 10 | 3·99 15 | 2·32 | 22 | 1·76| 2·39| 3·66| 5·15| 6·36| 15 | 3·50 20 | 2·33 | 23 | 1·77| | 3·66| | 6·33| 20 | 3·33 25 | 2·41 | 24 | 1·75| 2·45| 3·66| 5·40| 6·28| 25 | 3·01 30 | 2·42 | 25 | 1·78| 2·48| 3·69| 5·55| 6·25| 30 | 2·86 +---------+-----+-----+-----+-----+-----+-----+ +-------- Mean.| 2·34 | 26 | .. | 2·50| 3·68| 5·72| 6·20|Mean.| 3·57 -----+---------+ | | | | | +-----+-------- | April. | 27 | 1·80| 2·54| 3·69| 5·84| 6·15| | 1 | 2·40 | 28 | 1·83| 2·61| 3·69| 5·93| 6·11| | 5 | 2·38 | 29 | 1·85| 2·82| 3·66| 6·05| 6·10| | 10 | 2·25 | 30 | 1·83| 3·01| 3·70| 6·15| 6·15| | | +-----+-----+-----+-----+-----+-----+ | 15 | 2·22 | 31 | 1·83| .. | 3·72| 6·18| .. | | | +-----+-----+-----+-----+-----+-----+ | 20 | 2·40 |Mean.| 1·84| 2·25| 3·58| 4·61| 6·22| | | +-----+-----+-----+-----+-----+-----+ | 25 | 2·20 | | | | | | | | 30 | 2·04 | | | | | | | | +---------+ | | | | | | | Mean.| 2·27 | | | | | | | | =====+=========+=====+=====+=====+=====+=====+=====+=====+========

Zero is R. L. 12·25 metres.

1904 =====+=========+=====+=====+=====+=====+=====+=====+=====+======== Date.| Month. |Date.| May.|June.|July.| Au- |Sept.|Date.|Month. | | | | | |gust.| | | -----+---------+-----+-----+-----+-----+-----+-----+-----+-------- |January. | | | | | | | |October. 1 | 2·82 | 1 | 2·58| 2·60| 3·59| 3·88| 5·68| 1 | .. 5 | 2·69 | 2 | 2·58| 2·65| 3·59| 3·93| 5·66| 5 | .. 10 | 2·12 | 3 | 2·56| 3·05| 3·57| 4·04| 5·64| 10 | .. 15 | 2·54 | 4 | 2·56| 2·90| 3·56| 4·15| 5·62| 15 | .. 20 | 2·47 | 5 | 2·57| 2·75| 3·59| 4·26| 5·65| 20 | .. | +-----+-----+-----+-----+-----+-----+ | 25 | 2·41 | 6 | 2·57| 2·80| 3·59| 4·38| 5·65| 25 | .. 30 | 2·44 | 7 | 2·54| 2·84| 3·59| 4·47| 5·66| 30 | .. +---------+ | | | | | | +-------- Mean.| 2·50 | 8 | 2·56| 2·86| 3·57| 4·56| 5·67|Mean.| .. -----+---------+ | | | | | +-----+-------- |February.| 9 | 2·54| 2·88| 3·57| 4·65| 5·69| |Novem. 1 | 2·50 | 10 | 2·54| 2·92| 3·54| 4·76| 5·75| 1 | .. | +-----+-----+-----+-----+-----+-----+ | 5 | 2·62 | 11 | 2·52| 2·97| 3·54| 4·84| 5·79| 5 | .. 10 | 2·74 | 12 | 2·52| 3·01| 3·54| 5·14| 5·83| 10 | .. 15 | 2·70 | 13 | 2·54| -- | 3·55| 5·40| 5·84| 15 | .. 20 | 2·66 | 14 | 2·56| 3·08| 3·54| 5·62| 5·82| 20 | .. 25 | 2·83 | 15 | 2·54| 3·09| 3·57| 5·80| 5·80| 25 | .. | +-----+-----+-----+-----+-----+-----+ | 28 | 2·83 | 16 | 2·52| 3·07| 3·54| 5·94| 5·83| 30 | .. +---------+ | | | | | | +-------- Mean.| 2·70 | 17 | 2·50| 3·10| 3·54| 5·95| 5·85|Mean.| .. -----+---------+ | | | | | +-----+-------- | March. | 18 | 2·54| 3·15| 3·54| 5·97| 5·89| |Decem. 1 | 2·73 | 19 | 2·54| 3·23| 3·54| 5·97| 5·93| 1 | .. 5 | 2·79 | 20 | 2·52| 3·35| 3·52| 5·93| 5·92| 5 | .. | +-----+-----+-----+-----+-----+-----+ | 10 | 2·75 | 21 | 2·52| 3·50| 3·52| 5·91| 5·92| 10 | .. 15 | 2·70 | 22 | 2·52| 3·57| 3·54| 5·86| 5·89| 15 | .. 20 | 2·70 | 23 | 2·52| 3·59| 3·54| 5·82| 5·86| 20 | .. 25 | 2·66 | 24 | 2·51| 3·60| 3·54| 5·77| 5·80| 25 | .. 30 | 2·60 | 25 | 2·52| 3·55| 3·57| 5·75| .. | 30 | .. +---------+-----+-----+-----+-----+-----+-----+ +-------- Mean.| 2·70 | 26 | 2·56| 3·55| 3·57| 5·74| .. |Mean.| .. -----+---------+ | | | | | +-----+-------- | April. | 27 | 2·57| 3·57| 3·57| 5·73| .. | | 1 | 2·61 | 28 | 2·58| 3·57| 3·57| 5·70| .. | | 5 | 2·61 | 29 | 2·56| 3·58| 3·59| 5·69| .. | | 10 | 2·56 | 30 | 2·54| 3·58| 3·73| 5·68| .. | | | +-----+-----+-----+-----+-----+-----+ | 15 | 2·60 | 31 | 2·56| .. | 3·88| 5·68| .. | | | +-----+-----+-----+-----+-----+-----+ | 20 | 2·38 |Mean.| 2·55| 3·12| 3·14| 5·15| .. | | | +-----+-----+-----+-----+-----+-----+ | 25 | 2·11 | | | | | | | | 30 | 2·52 | | | | | | | | -----+---------+ | | | | | | | Mean.| 2·48 | | | | | | | | =====+=========+=====+=====+=====+=====+=====+=====+=====+========

Zero is R. L. 12·25 metres.

TABLE LXVIII.--_Gauges downstream of the Rosetta Weir._

=====+=====+=====+=====+=====+=====+=====+=====+ Year.|Date.| Jan.| Feb.| Mar.| Apr.| May.| Jun.| -----+-----+-----+-----+-----+-----+-----+-----+ 1902 | 1 | 3·57| 2·12| 1·00| 0·00|-0·50|-0·50| | 5 | 3·53| 1·95| 0·87|-0·48|-0·50|-0·50| | 10 | 3·40| 1·77| 0·67|-0·45|-0·50|-0·12| | 15 | 3·12| 1·54| 0·31|-0·48|-0·50| 0·00| +-----+-----+-----+-----+-----+-----+-----+ | 20 | 2·75| 1·37| 0·60|-0·47|-0·50|-0·02| | 25 | 2·58| 1·15| 0·33|-0·50|-0·50| 0·00| | 30 | 2·24| 0·93|-0·29|-0·50|-0·50| 0·00| | Mean| 3·03| 1·55| 0·36|-0·41|-0·50|-0·16| -----+-----+-----+-----+-----+-----+-----+-----+ 1903 | 1 | 3·52| 2·56| 1·44|-0·35|-0·40|-0·46| | 5 | 3·48| 2·22| 1·25|-0·38|-0·42|-0·46| | 10 | 3·39| 1·94| 0·67|-0·38|-0·44|-0·46| | 15 | 3·44| 1·88| 0·50|-0·40|-0·45|-0·46| +-----+-----+-----+-----+-----+-----+-----+ | 20 | 3·24| 1·79| 0·38|-0·40|-0·46|-0·46| | 25 | 3·03| 1·62| 0·01|-0·40|-0·46|-0·46| | 30 | 2·80| 1·50|-0·32|-0·40|-0·46|-0·46| +-----+-----+-----+-----+-----+-----+-----+ | Mean| 3·27| 1·93| 0·56|-0·39|-0·44|-0·46| -----+-----+-----+-----+-----+-----+-----+-----+ 1904 | 1 | 2·98| 2·56| 2·28| 0·00|-0·33|-0·35| | 5 | 2·80| 3·06| 1·25|-0·20|-0·32|-0·35| | 10 | 2·71| 2·90| 0·50|-0·40|-0·32|-0·31| | 15 | 2·66| 2·75| 0·00|-0·25|-0·32|-0·32| +-----+-----+-----+-----+-----+-----+-----+ | 20 | 2·57| 2·57| 0·00|-0·40|-0·32|-0·32| | 25 | 2·54| 2·38| 0·00|-0·32|-0·32|-0·10| | 30 | 2·44| 2·28| 0·00|-0·34|-0·35|-0·24| -----+-----+-----+-----+-----+-----+-----+-----+ | Mean| 2·67| 2·50| 0·58|-0·27|-0·33|-0·28| =====+=====+=====+=====+=====+=====+=====+=====+

=====+=====+=====+=====+=====+=====+=====+===== Year.|Date.| Jul.| Aug.| Sep.| Oct.| Nov.| Dec. -----+-----+-----+-----+-----+-----+-----+----- 1902 | 1 | 0·00| 1·10| 4·30| 5·36| 4·54| 4·10 | 5 | 0·00| 1·94| 4·83| 5·24| 4·27| 3·63 | 10 | 0·05| 2·00| 5·04| 5·08| 3·85| 3·90 | 15 | 0·03| 2·26| 5·16| 5·12| 3·50| 3·95 +-----+-----+-----+-----+-----+-----+----- | 20 | 0·08| 2·87| 5·28| 5·32| 3·38| 3·99 | 25 | 0·16| 3·77| 5·40| 5·08| 3·10| 3·84 | 30 | 0·94| 4·22| 5·36| 4·71| 3·98| 3·58 | Mean| 0·18| 2·60| 5·05| 5·11| 3·80| 3·89 -----+-----+-----+-----+-----+-----+-----+----- 1903 | 1 |-0·43| 1·92| 6·12| 6·00| 6·07| 3·20 | 5 |-0·30| 2·75| 5·98| 6·11| 6·00| 2·90 | 10 |-0·20| 3·45| 6·00| 6·33| 5·86| 3·18 | 15 |-0·12| 4·05| 6·12| 6·33| 5·24| 3·11 +-----+-----+-----+-----+-----+-----+----- | 20 |-0·76| 4·26| 6·22| 6·43| 4·48| 3·00 | 25 |-0·70| 5·24| 6·07| 6·59| 3·95| 3·09 | 30 |-1·50| 6·03| 5·95| 6·26| 3·42| 3·00 +-----+-----+-----+-----+-----+-----+----- | Mean|-0·27| 3·96| 6·07| 6·29| 5·00| 3·07 -----+-----+-----+-----+-----+-----+-----+----- 1904 | 1 |-0·24| 1·50| 5·19| .. | .. | .. | 5 |-0·24| 2·80| 5·11| .. | .. | .. | 10 |-0·24| 3·96| 5·23| .. | .. | .. | 15 |-0·24| 5·45| 5·31| .. | .. | .. +-----+-----+-----+-----+-----+-----+----- | 20 |-0·24| 5·63| 5·45| .. | .. | .. | 25 |-0·24| 5·30| .. | .. | .. | .. | 30 | 0·20| 5·19| .. | .. | .. | .. -----+-----+-----+-----+-----+-----+-----+----- | Mean| 0·23| 4·26| .. | .. | .. | .. =====+=====+=====+=====+=====+=====+=====+=====

Zero is R. L. 10·00 metres.

TABLE LXIX.--_Gauges downstream of the Damietta Weir._

=====+=====+=====+=====+=====+=====+=====+=====+ Year.|Date.| Jan.| Feb.| Mar.| Apr.| May.| Jun.| -----+-----+-----+-----+-----+-----+-----+-----+ 1902 | 1 | 0·44| 0·50| 0·75| 0·14|-0·01| 0·27| | 5 | 0·44| 0·55| 0·75| 0·06|-0·01| 0·27| | 10 | 0·41| 0·65| 0·75| 0·00|-0·01|-0·01| | 15 | 0·36| 0·75| 0·75| 0·00|-0·01|-0·03| +-----+-----+-----+-----+-----+-----+-----+ | 20 | 0·34| 0·50| 0·27|-0·01| 0·07|-0·04| | 25 | 0·32| 0·75| 0·17|-0·01| 0·10|-0·04| | 30 | 0·50| 0·75| 0·14|-0·01| 0·21|-0·04| +-----+-----+-----+-----+-----+-----+-----+ |Mean.| 0·40| 0·64| 0·51| 0·02| 0·05| 0·05| -----+-----+-----+-----+-----+-----+-----+-----+ 1903 | 1 | 0·42| 0·30| 0·29| 0·52|-0·12|-0·15| | 5 | 0·35| 0·30| 0·77| 0·14|-0·12|-0·15| | 10 | 0·33| 0·30| 0·95| 0·00|-0·14|-0·15| | 15 | 0·33| 0·30| 0·68|-0·02|-0·14|-0·15| +-----+-----+-----+-----+-----+-----+-----+ | 20 | 0·33| 0·30| 0·63|-0·08|-0·15|-0·15| | 25 | 0·33| 0·30| 0·60|-0·10|-0·15|-0·15| | 30 | 0·30| 0·30| 0·67|-0·12|-0·15|-0·15| +-----+-----+-----+-----+-----+-----+-----+ |Mean.| 0·34| 0·30| 0·66| 0·05|-0·14|-0·15| -----+-----+-----+-----+-----+-----+-----+-----+ 1904 | 1 | 3·60| 2·94| 0·72| 1·55| 0·11|-0·05| | 5 | 3·51| 1·88| 2·53| 1·37| 0·41|-0·08| | 10 | 3·46| 0·77| 3·06| 1·00| 0·46|-0·09| | 15 | 3·41| 0·75| 2·65| 0·45| 0·24|-0·09| +-----+-----+-----+-----+-----+-----+-----+ | 20 | 3·35| 0·68| 2·38| 1·52| 0·02|-0·09| | 25 | 3·32| 0·66| 1·96| 1·16| 0·35| 1·06| | 30 | 3·24| 0·72| 1·82| 0·15|-0·02| 1·97| +-----+-----+-----+-----+-----+-----+-----+ |Mean.| 3·41| 1·20| 2·16| 1·03| 0·22| 0·38| =====+=====+=====+=====+=====+=====+=====+=====+

=====+=====+=====+=====+=====+=====+=====+===== Year.|Date.| Jul.| Aug.| Sep.| Oct.| Nov.| Dec. -----+-----+-----+-----+-----+-----+-----+----- 1902 | 1 |-0·04| 1·18| 4·34| 5·26| 4·54| 2·62 | 5 |-0·04| 1·20| 4·80| 5·14| 4·29| 2·02 | 10 |-0·04| 2·23| 5·00| 5·02| 4·01| 1·25 | 15 | 0·21| 2·73| 5·12| 5·06| 3·80| 0·85 +-----+-----+-----+-----+-----+-----+----- | 20 | 0·35| 3·40| 5·20| 5·26| 3·75| 0·60 | 25 | 0·38| 3·98| 5·30| 5·02| 3·52| 0·45 | 30 | 1·20| 4·26| 5·26| 4·66| 2·77| 0·42 +-----+-----+-----+-----+-----+-----+----- |Mean.| 0·29| 2·71| 5·00| 5·06| 3·81| 1·17 -----+-----+-----+-----+-----+-----+-----+----- 1903 | 1 |-0·13| 1·00| 6·06| 6·09| 6·15| 4·77 | 5 | 0·67| 0·80| 6·08| 6·22| 6·09| 4·76 | 10 | 0·33| 0·50| 6·10| 6·48| 5·95| 4·00 | 15 | 1·20| 2·30| 6·19| 6·46| 5·46| 3·54 +-----+-----+-----+-----+-----+-----+----- | 20 | 1·00| 4·32| 6·30| 6·57| 4·95| 3·44 | 25 | 1·20| 5·29| 6·14| 6·75| 4·87| 3·68 | 30 | 1·10| 5·98| 6·06| 6·35| 4·85| 3·62 +-----+-----+-----+-----+-----+-----+----- |Mean.| 0·77| 2·88| 6·13| 6·41| 5·46| 3·97 -----+-----+-----+-----+-----+-----+-----+----- 1904 | 1 | 2·02| 3·08| 5·20| .. | .. | .. | 5 | 1·75| 3·64| 5·11| .. | .. | .. | 10 | 1·16| 4·22| 5·23| .. | .. | .. | 15 | 0·50| 5·54| 5·31| .. | .. | .. +-----+-----+-----+-----+-----+-----+----- | 20 |-0·03| 5·69| 5·47| .. | .. | .. | 25 |-0·05| 5·32| .. | .. | .. | .. | 30 | 2·00| 5·20| .. | .. | .. | .. +-----+-----+-----+-----+-----+-----+----- |Mean.| 1·05| 4·67| .. | .. | .. | .. =====+=====+=====+=====+=====+=====+=====+=====

Zero is R. L. 10·00 metres.

Appendix M.

TABLE LXX.--_Assuân gauge. Pics referred to metres with Zero at R. L. 85·00 metres._

=======+=======================================================+ Kirats.|PICS AND KIRATS CONVERTED INTO METRES, REFERRED TO ZERO| | AT R. L. 85·00 METRES, OR 1 PIC 14 | +-------+-------+-------+-------+-------+-------+-------+ | Pic 0.| Pic 1.| Pic 2.| Pic 3.| Pic 4.| Pic 5.| Pic 6.| +-------+-------+-------+-------+-------+-------+-------+ |metres.|metres.|metres.|metres.|metres.|metres.|metres.| -------+-------+-------+-------+-------+-------+-------+-------+ 0 | -·84 | -·30 | ·24 | ·78 | 1·32 | 1·86 | 2·40 | 1 | -·82 | -·28 | ·26 | ·80 | 1·34 | 1·88 | 2·42 | 2 | -·80 | -·25 | ·28 | ·82 | 1·37 | 1·91 | 2·45 | 3 | -·78 | -·23 | ·31 | ·85 | 1·39 | 1·93 | 2·47 | 4 | -·75 | -·21 | ·33 | ·87 | 1·41 | 1·95 | =2·50=| 5 | -·73 | -·19 | ·35 | ·89 | 1·43 | 1·97 | 2·52 | 6 | -·71 | -·17 | ·37 | ·92 | 1·45 | =2·00=| 2·54 | | | | | | | | | 7 | -·68 | -·14 | ·40 | ·94 | 1·47 | 2·02 | 2·56 | 8 | -·66 | -·12 | ·42 | ·96 | =1·50=| 2·04 | 2·58 | 9 | -·64 | -·10 | ·44 | ·98 | 1·52 | 2·06 | 2·60 | 10 | -·61 | -·08 | ·46 | =1·00=| 1·55 | 2·08 | 2·63 | 11 | -·59 | -·06 | ·48 | 1·02 | 1·57 | 2·11 | 2·65 | 12 | -·57 | -·04 | =0·50=| 1·05 | 1·59 | 2·13 | 2·67 | | | | | | | | | 13 | -·55 | -·02 | ·53 | 1·07 | 1·61 | 2·15 | 2·69 | 14 | -·52 | =0·00=| ·55 | 1·09 | 1·63 | 2·17 | 2·71 | 15 | -=·50=| ·03 | ·58 | 1·12 | 1·66 | 2·20 | 2·74 | 16 | -·48 | ·06 | ·60 | 1·14 | 1·68 | 2·22 | 2·76 | 17 | -·46 | ·08 | ·62 | 1·16 | 1·70 | 2·24 | 2·78 | 18 | -·44 | ·10 | ·65 | 1·18 | 1·73 | 2·26 | 2·81 | | | | | | | | | 19 | -·41 | ·12 | ·67 | 1·21 | 1·75 | 2·29 | 2·83 | 20 | -·39 | ·15 | ·69 | 1·23 | 1·77 | 2·31 | 2·85 | 21 | -·37 | ·17 | ·71 | 1·25 | 1·79 | 2·33 | 2·87 | 22 | -·35 | ·20 | ·74 | 1·27 | 1·82 | 2·35 | 2·90 | 23 | -·32 | ·22 | ·76 | 1·30 | 1·34 | 2·38 | 2·92 | =======+=======+=======+=======+=======+=======+=======+=======+

=======+===============================================+ Kirats.|PICS AND KIRATS CONVERTED INTO METRES, REFERRED| |TO ZERO AT R. L. 85·00 METRES, OR 1 PIC 14 | +-------+-------+-------+-------+-------+-------+ | Pic 7.| Pic 8.| Pic 9.|Pic 10.|Pic 11.|Pic 12.| +-------+-------+-------+-------+-------+-------+ |metres.|metres.|metres.|metres.|metres.|metres.| -------+-------+-------+-------+-------+-------+-------+ 0 | 2·94 | 3·48 | =4·00=| 4·56 | 5·10 | 5·64 | 1 | 2·97 | =3·50=| 4·03 | 4·58 | 5·12 | 5·66 | 2 | =3·00=| 3·52 | 4·06 | 4·60 | 5·14 | 5·68 | 3 | 3·02 | 3·55 | 4·08 | 4·63 | 5·17 | 5·71 | 4 | 3·04 | 3·57 | 4·11 | 4·65 | 5·19 | 5·73 | 5 | 3·06 | 3·59 | 4·13 | 4·67 | 5·21 | 5·75 | 6 | 3·08 | 3·61 | 4·16 | 4·70 | 5·24 | 5·77 | | | | | | | | 7 | 3·10 | 3·64 | 4·18 | 4·72 | 5·26 | 5·80 | 8 | 3·12 | 3·66 | 4·20 | 4·74 | 5·28 | 5·82 | 9 | 3·14 | 3·68 | 4·22 | 4·76 | 5·30 | 5·84 | 10 | 3·16 | 3·70 | 4·24 | 4·78 | 5·32 | 5·86 | 11 | 3·19 | 3·73 | 4·27 | 4·81 | 5·35 | 5·89 | 12 | 3·21 | 3·75 | 4·29 | 4·83 | 5·37 | 5·91 | | | | | | | | 13 | 3·23 | 3·77 | 4·31 | 4·85 | 5·39 | 5·93 | 14 | 3·25 | 3·79 | 4·33 | 4·88 | 5·42 | 5·96 | 15 | 3·28 | 3·82 | 4·36 | 4·90 | 5·44 | 5·98 | 16 | 3·30 | 3·84 | 4·38 | 4·92 | 5·46 | =6·00=| 17 | 3·32 | 3·86 | 4·40 | 4·94 | 5·48 | 6·02 | 18 | 3·35 | 3·88 | 4·42 | 4·96 | =5·50=| 6·04 | | | | | | | | 19 | 3·37 | 3·90 | 4·44 | 4·98 | 5·53 | 6·07 | 20 | 3·39 | 3·92 | 4·46 | =5·00=| 5·55 | 6·09 | 21 | 3·41 | 3·94 | 4·48 | 5·03 | 5·57 | 6·11 | 22 | 3·43 | 3·96 | =4·50=| 5·05 | 5·60 | 6·14 | 23 | 3·46 | 3·98 | 4·53 | 5·08 | 5·62 | 6·16 | =======+=======+=======+=======+=======+=======+=======+

=======+=============================================== Kirats.|PICS AND KIRATS CONVERTED INTO METRES, REFERRED |TO ZERO AT R. L. 85·00 METRES, OR 1 PIC 14 +-------+-------+-------+-------+-------+------- |Pic 13.|Pic 14.|Pic 15.|Pic 16.|Pic 17.|Pic 18. +-------+-------+-------+-------+-------+------- |metres.|metres.|metres.|metres.|metres.|metres. -------+-------+-------+-------+-------+-------+------- 0 | 6·18 | 6·72 | 7·26 | 7·80 | 8·34 | 8·88 1 | 6·20 | 6·74 | 7·28 | 7·82 | 8·36 | 8·90 2 | 6·22 | 6·76 | 7·30 | 7·84 | 8·38 | 8·92 3 | 6·25 | 6·79 | 7·33 | 7·87 | 8·41 | 8·94 4 | 6·27 | 6·81 | 7·35 | 7·8 | 8·43 | 8·96 5 | 6·29 | 6·83 | 7·37 | 7·91 | 8·45 | 8·98 6 | 6·31 | 6·85 | 7·39 | 7·93 | 8·48 | =9·00= | | | | | | 7 | 6·34 | 6·88 | 7·42 | 7·96 | =8·50=| 9·03 8 | 6·36 | 6·90 | 7·44 | 7·98 | 8·52 | 9·06 9 | 6·38 | 6·92 | 7·46 | =8·00=| 8·54 | 9·08 10 | 6·41 | 6·95 | 7·48 | 8·02 | 8·57 | 9·10 11 | 6·43 | 6·97 | =7·50=| 8·05 | 8·59 | 9·13 12 | 6·45 | =7·00=| 7·53 | 8·07 | 8·61 | 9·15 | | | | | | 13 | 6·47 | 7·02 | 7·55 | 8·09 | 8·63 | 9·17 14 | =6·50=| 7·04 | 7·58 | 4·11 | 8·65 | 9·19 15 | 6·52 | 7·06 | 7·60 | 8·14 | 8·68 | 9·22 16 | 6·54 | 7·08 | 7·62 | 8·16 | 8·70 | 9·24 17 | 6·56 | 7·10 | 7·64 | 8·18 | 8·72 | 9·26 18 | 6·58 | 7·13 | 7·66 | 8·20 | 8·74 | 9·29 | | | | | | 19 | 6·60 | 7·15 | 7·69 | 8·23 | 8·77 | 9·31 20 | 6·63 | 7·17 | 7·71 | 8·25 | 8·79 | 9·33 21 | 6·65 | 7·19 | 7·73 | 8·27 | 8·81 | 9·35 22 | 6·68 | 7·21 | 7·75 | 8·29 | 8·83 | 9·37 23 | 6·70 | 7·24 | 7·78 | 8·32 | 8·86 | 9·40 =======+=======+=======+=======+=======+=======+=======

TABLE LXXI.--_Cairo gauge._ _Pics referred to metres with Zero at R. L. 12·25 metres._

=======+=======================================================+ Kirats.|PICS AND KIRATS CONVERTED INTO METRES, REFERRED TO ZERO| | AT R. L. 85·00 METRES, OR 1 PIC 14 | +-------+-------+-------+-------+-------+-------+-------+ | Pic 8.| Pic 9.|Pic 10.|Pic 11.|Pic 12.|Pic 13.|Pic 14.| +-------+-------+-------+-------+-------+-------+-------+ |metres.|metres.|metres.|metres.|metres.|metres.|metres.| -------+-------+-------+-------+-------+-------+-------+-------+ 0 | ·89 | 1·48 | 2·03 | 2·62 | 3·16 | 3·69 | 4·18 | 1 | ·91 | =1·50=| 2·05 | 2·65 | 3·18 | 3·71 | 4·20 | 2 | ·93 | 1·52 | 2·08 | 2·67 | 3·20 | 3·73 | 4·22 | 3 | ·95 | 1·54 | 2·10 | 2·70 | 3·22 | 3·75 | 4·24 | 4 | ·97 | 1·56 | 2·13 | 2·72 | 3·24 | 3·77 | 4·26 | 5 | =1·00=| 1·59 | 2·15 | 2·74 | 3·27 | 3·79 | 4·28 | 6 | 1·02 | 1·61 | 2·18 | 2·76 | 3·29 | 3·82 | 4·30 | | | | | | | | | 7 | 1·05 | 1·63 | 2·21 | 2·78 | 3·31 | 3·84 | 4·32 | 8 | 1·07 | 1·65 | 2·24 | 2·80 | 3·34 | 3·86 | 4·34 | 9 | 1·09 | 1·67 | 2·26 | 2·82 | 3·37 | 3·88 | 4·36 | 10 | 1·11 | 1·69 | 2·29 | 2·84 | 3·39 | 3·90 | 4·38 | 11 | 1·13 | 1·72 | 2·31 | 2·86 | 3·41 | 3·92 | 4·40 | 12 | 1·15 | 1·74 | 2·33 | 2·88 | 3·43 | 3·94 | 4·42 | | | | | | | | | 13 | 1·17 | 1·76 | 2·35 | 2·90 | 3·46 | 3·96 | 4·44 | 14 | 1·20 | 1·78 | 2·37 | 2·93 | 3·48 | 3·98 | 4·46 | 15 | 1·22 | 1·81 | 2·39 | 2·95 | =3·50=| =4·00=| 4·48 | 16 | 1·25 | 1·83 | 2·42 | 2·97 | 3·52 | 4·02 | =4·50=| 17 | 1·28 | 1·86 | 2·45 | =3·00=| 3·54 | 4·04 | 4·52 | 18 | 1·31 | 1·88 | 2·48 | 3·02 | 3·56 | 4·06 | 4·54 | | | | | | | | | 19 | 1·34 | 1·91 | =2·50=| 3·04 | 3·58 | 4·08 | 4·56 | 20 | 1·37 | 1·94 | 2·52 | 3·06 | 3·60 | 4·10 | 4·58 | 21 | 1·40 | 1·96 | 2·55 | 3·09 | 3·62 | 4·12 | 4·60 | 22 | 1·42 | 1·98 | 2·57 | 3·11 | 3·64 | 4·14 | 4·62 | 23 | 1·45 | =2·00=| 2·60 | 3·13 | 3·66 | 4·16 | 4·64 | =======+=======+=======+=======+=======+=======+=======+=======+

=======+===============================================+ Kirats.|PICS AND KIRATS CONVERTED INTO METRES, REFERRED| | TO ZERO AT R. L. 85·00 METRES, OR 1 PIC 14 | +-------+-------+-------+-------+-------+-------+ |Pic 15.|Pic 16.|Pic 17.|Pic 18.|Pic 19.|Pic 20.| +-------+-------+-------+-------+-------+-------+ |metres.|metres.|metres.|metres.|metres.|metres.| -------+-------+-------+-------+-------+-------+-------+ 0 | 4·66 | 5·15 | 5·39 | 5·64 | 5·91 | 6·18 | 1 | 4·68 | 5·16 | 5·40 | 5·65 | 5·92 | 6·19 | 2 | 4·70 | 5·17 | 5·41 | 5·66 | 5·93 | 6·20 | 3 | 4·72 | 5·18 | 5·42 | 5·67 | 5·94 | 6·21 | 4 | 4·74 | 5·19 | 5·43 | 5·68 | 5·96 | 6·23 | 5 | 4·76 | 5·20 | 5·44 | 5·69 | 5·97 | 6·24 | 6 | 4·78 | 5·21 | 5·45 | 5·70 | 5·98 | 6·25 | | | | | | | | 7 | 4·80 | 5·22 | 5·46 | 5·71 | 5·99 | 6·26 | 8 | 4·82 | 5·23 | 5·47 | 5·72 | =6·00=| 6·27 | 9 | 4·84 | 5·24 | 5·48 | 5·74 | 6·01 | 6·28 | 10 | 4·86 | 5·25 | 5·49 | 5·75 | 6·02 | 6·29 | 11 | 4·88 | 5·26 | =5·50=| 5·76 | 6·03 | 6·31 | 12 | 4·90 | 5·27 | 5·51 | 5·77 | 6·04 | 6·32 | | | | | | | | 13 | 4·92 | 5·28 | 5·52 | 5·78 | 6·05 | 6·33 | 14 | 4·94 | 5·29 | 5·53 | 5·79 | 6·07 | 6·34 | 15 | 4·96 | 5·30 | 5·54 | 5·80 | 6·08 | 6·35 | 16 | 4·98 | 5·31 | 5·55 | 5·81 | 6·09 | 6·36 | 17 | =5·00=| 5·32 | 5·57 | 5·83 | 6·10 | 6·37 | 18 | 5·02 | 5·33 | 5·58 | 5·84 | 6·12 | 6·39 | | | | | | | | 19 | 5·04 | 5·34 | 5·59 | 5·85 | 6·13 | 6·40 | 20 | 5·06 | 5·35 | 5·60 | 5·87 | 6·14 | 6·41 | 21 | 5·09 | 5·36 | 5·61 | 5·88 | 6·15 | 6·42 | 22 | 5·11 | 5·37 | 5·62 | 5·89 | 6·16 | 6·43 | 23 | 5·13 | 5·38 | 5·63 | 5·90 | 6·17 | 6·44 | =======+=======+=======+=======+=======+=======+=======+

=======+=============================================== Kirats.|PICS AND KIRATS CONVERTED INTO METRES, REFERRED | TO ZERO AT R. L. 85·00 METRES, OR 1 PIC 14 +-------+-------+-------+-------+-------+------- |Pic 21.|Pic 22.|Pic 23.|Pic 24.|Pic 25.|Pic 26. +-------+-------+-------+-------+-------+------- |metres.|metres.|metres.|metres.|metres.|metres. -------+-------+-------+-------+-------+-------+------- 0 | 6·46 | 6·74 | 7·26 | 7·83 | 8·35 | 8·88 1 | 6·47 | 6·76 | 7·28 | 7·85 | 8·37 | 8·91 2 | 6·48 | 6·78 | 7·31 | 7·87 | 8·39 | 8·93 3 | 6·49 | 6·80 | 7·35 | 7·89 | 8·41 | 8·95 4 | =6·50=| 6·83 | 7·37 | 7·91 | 8·43 | 8·97 5 | 6·51 | 6·85 | 7·39 | 7·93 | 8·46 | =9·00= 6 | 6·52 | 6·87 | 7·41 | 7·96 | 8·48 | 9·02 | | | | | | 7 | 6·53 | 6·89 | 7·43 | 7·98 | =8·50=| 9·04 8 | 6·54 | 6·91 | 7·46 | =8·00=| 8·52 | 9·06 9 | 6·56 | 6·93 | 7·48 | 8·02 | 8·54 | 9·09 10 | 6·57 | 6·96 | =7·50=| 8·04 | 8·56 | 9·11 11 | 6·58 | 6·98 | 7·52 | 8·06 | 8·59 | 9·13 12 | 6·59 | =7·00=| 7·54 | 8·09 | 8·61 | 9·15 | | | | | | 13 | 6·61 | 7·02 | 7·56 | 8·11 | 8·63 | 9·18 14 | 6·62 | 7·04 | 7·59 | 8·13 | 8·65 | 9·20 15 | 6·63 | 7·06 | 7·61 | 8·15 | 8·68 | 9·22 16 | 6·64 | 7·09 | 7·63 | 8·17 | 8·70 | 9·24 17 | 6·65 | 7·11 | 7·66 | 8·20 | 8·72 | 9·26 18 | 6·66 | 7·13 | 7·68 | 8·22 | 8·74 | 9·29 | | | | | | 19 | 6·68 | 7·16 | 7·71 | 8·24 | 8·76 | 9·31 20 | 6·69 | 7·18 | 7·73 | 8·26 | 8·79 | 9·33 21 | 6·70 | 7·20 | 7·75 | 8·29 | 8·81 | 9·35 22 | 6·71 | 7·22 | 7·78 | 8·31 | 8·83 | 9·37 23 | 6·73 | 7·24 | 7·80 | 8·33 | 8·85 | 9·40 =======+=======+=======+=======+=======+=======+=======

Appendix N.

TABLE LXXII.--_Table for Converting Cubic Metres per Day into Cubic Metres per Second._

============+============ Cubic metres|Cubic metres per day. | per second. ------------+------------ 10,000 | 0·1157 20,000 | 0·2315 30,000 | 0·3472 40,000 | 0·4630 50,000 | 0·5787 60,000 | 0·6944 70,000 | 0·8102 80,000 | 0·9259 90,000 | 1·0417 =100,000= | =1·1574= 150,000 | 1·7361 200,000 | 2·3148 250,000 | 2·8935 300,000 | 3·4722 350,000 | 4·0509 400,000 | 4·6296 450,000 | 5·2083 =500,000= | =5·7870= 550,000 | 6·3657 600,000 | 6·9444 650,000 | 7·5231 700,000 | 8·1018 750,000 | 8·6805 800,000 | 9·2593 850,000 | 9·8380 900,000 | 10·4167 950,000 | 10·9954 =1,000,000= | =11·5741= 1,250,000 | 14·4676 1,500,000 | 17·3611 1,750,000 | 20·2546 2,000,000 | 23·1481 2,250,000 | 26·0417 2,500,000 | 28·9352 2,750,000 | 31·8287 3,000,000 | 34·7222 3,250,000 | 37·6157 3,500,000 | 40·5092 3,750,000 | 43·4028 4,000,000 | 46·2963 4,250,000 | 49·1898 4,500,000 | 52·0833 4,750,000 | 54·9768 =5,000,000= | =57·8704= 5,250,000 | 60·7639 5,500,000 | 63·6574 5,750,100 | 66·5509 6,000,000 | 69·4444 6,250,000 | 72·3380 6,500,000 | 75·2315 6,750,000 | 78·1250 7,000,000 | 81·0185 7,250,000 | 83·9120 7,500,000 | 86·8055 7,750,000 | 89·6991 8,000,000 | 92·5926 8,250,000 | 95·4861 8,500,000 | 98·3796 8,750,000 | 101·2731 9,000,000 | 104·1667 9,250,000 | 107·0602 9,500,000 | 109·9537 9,750,000 | 112·8472 10,000,000 | 115·7407

_Rough Working Approximations._

============+============ Cubic metres|Cubic metres per day. | per second. ------------+------------ 125,000 | 1·5 250,000 | 3 500,000 | 6 750,000 | 9 1,000,000 | 12 2,000,000 | 24 3,000,000 | 36 4,000,000 | 48 5,000,000 | 60 6,000,000 | 72 7,000,000 | 84 8,000,000 | 96 9,000,000 | 108 10,000,000 | 120 ============+============

TABLE LXXIII.--_Table for converting Cubic Metres per Second into Cubic Metres per Day._

=======+============ Cubic | metres |Cubic metres per | per day. second.| -------+------------ 1 | 86,400 2 | 172,800 3 | 259,200 4 | 345,600 5 | 432,000 6 | 518,400 7 | 604,800 8 | 691,200 9 | 777,600 10 | 864,000 11 | 950,400 12 | 1,036,800 13 | 1,123,200 14 | 1,209,600 15 | 1,296,000 16 | 1,382,400 17 | 1,468,800 18 | 1,555,200 19 | 1,641,600 20 | 1,728,000 21 | 1,814,400 22 | 1,900,800 23 | 1,987,200 24 | 2,073,500 25 | 2,160,000 26 | 2,246,400 27 | 2,332,800 28 | 2,419,200 29 | 2,505,600 30 | 2,592,000 31 | 2,678,400 32 | 2,764,800 33 | 2,851,200 34 | 2,937,600 35 | 3,024,000 36 | 3,110,400 37 | 3,196,800 38 | 3,283,200 39 | 3,369,600 40 | 3,456,000 41 | 3,542,400 42 | 3,628,800 43 | 3,715,200 44 | 3,801,600 45 | 3,888,000 46 | 3,974,400 47 | 4,060,800 48 | 4,147,200 49 | 4,233,600 50 | 4,320,000 51 | 4,406,400 52 | 4,492,800 53 | 4,579,200 54 | 4,665,600 55 | 4,752,000 56 | 4,838,400 57 | 4,924,800 58 | 5,011,200 59 | 5,097,600 60 | 5,184,000 61 | 5,270,400 62 | 5,356,800 63 | 5,443,200 64 | 5,529,600 65 | 5,616,000 66 | 5,702,400 67 | 5,788,800 68 | 5,875,200 69 | 5,961,600 70 | 6,048,000 71 | 6,134,400 72 | 6,220,800 73 | 6,307,200 74 | 6,393,600 75 | 6,480,000 76 | 6,566,400 77 | 6,652,800 78 | 6,739,200 79 | 6,825,600 80 | 6,912,000 81 | 6,998,400 82 | 7,084,800 83 | 7,171,200 84 | 7,257,600 85 | 7,344,000 86 | 7,430,400 87 | 7,516,800 88 | 7,603,200 89 | 7,689,600 90 | 7,776,000 91 | 7,862,400 92 | 7,948,800 93 | 8,035,200 94 | 8,121,600 95 | 8,208,000 96 | 8,294,400 97 | 8,380,800 98 | 8,467,200 99 | 8,553,600 100 | 8,640,000 =======+============

Appendix P.

TABLE LXXIV.--_Bombay rainfall compared with the Assuân gauges._

=====+=======================================+======================== Year.| BOMBAY RAINFALL | ASSUÂN GAUGE | IN MILLIMETRES | IN METRES +-----+-----+-----+-----+-------+-------+-----+-----+------------ |June.|July.| Au- |Sept.| Total | Varia-| Au- |Sept.| Variation | | |gust.| | 4 | tion |gust.| |from normal. | | | | |Months.| from | | +------------ | | | | | |normal.| | | Aug.|Sept. -----+-----+-----+-----+-----+-------+-------+-----+-----+-----+------ 1874| 474| 1046| 282| 279| 2081 | +267 | 7·96| 8·59|+1·20| +0·91 -----+-----+-----+-----+-----+-------+-------+-----+-----+-----+------ 1875| 618| 389| 310| 806| 2123 | +309 | 7·32| 8·06|+0·56| +0·38 1876| 328| 602| 220| 119| 1269 | -545 | 7·19| 8·38|+0·43| +0·70 -----+-----+-----+-----+-----+-------+-------+-----+-----+-----+------ 1877| 904| 281| 216| 226| 1627 | -187 | 5·67| 6·11|-1·09| -1·57 -----+-----+-----+-----+-----+-------+-------+-----+-----+-----+------ 1878| 505| 1227| 518| 417| 2667 | +853 | 6·84| 8·62|+0·08| +0·94 -----+-----+-----+-----+-----+-------+-------+-----+-----+-----+------ 1879| 420| 285| 567| 142| 1414 | -400 | 7·39| 8·13|+0·63| +0·45 1880| 544| 465| 104| 579| 1692 | -122 | 6·96| 7·43|+0·20| -0·25 1881| 387| 747| 483| 116| 1733 | -81 | 5·96| 8·07|-0·80| +0·39 1882| 699| 683| 85| 255| 1722 | -92 | 6·00| 7·33|-0·76| -0·35 1883| 346| 1011| 318| 312| 1987 | +173 | 7·20| 7·91|+0·44| +0·23 1884| 335| 655| 386| 432| 1808 | -6 | 6·06| 7·04|-0·70| -0·64 1885| 130| 554| 645| 305| 1634 | -180 | 7·39| 7·61|+0·63| -0·07 1886| 1103| 907| 272| 166| 2448 | +634 | 6·38| 7·65|-0·38| -0·03 -----+-----+-----+-----+-----+-------+-------+-----+-----+-----+------ 1887| 610| 785| 445| 463| 2303 | +489 | 7·95| 8·62|+1·19| +0·94 -----+-----+-----+-----+-----+-------+-------+-----+-----+-----+------ 1888| 401| 573| 289| 124| 1387 | -427 | 5·99| 6·61|-0·77| -1·07 -----+-----+-----+-----+-----+-------+-------+-----+-----+-----+------ 1889| 505| 775| 260| 63| 1603 | -211 | 6·88| 7·91|+0·12| +0·23 1890| 607| 554| 275| 168| 1604 | -210 | 7·47| 8·14|+0·71| +0·46 1891| 348| 830| 170| 575| 1923 | +109 | 6·79| 7·83|+0·03| +0·15 -----+-----+-----+-----+-----+-------+-------+-----+-----+-----+------ 1892| 338| 600| 838| 569| 2345 | +531 | 7·14| 8·67|+0·38| +0·99 -----+-----+-----+-----+-----+-------+-------+-----+-----+-----+------ 1893| 544| 399| 343| 197| 1483 | -331 | 6·97| 7·43|+0·21| -0·25 1894| 426| 662| 218| 305| 1611 | -203 | 7·27| 8·37|+0·51| +0·69 1895| 452| 455| 402| 307| 1616 | -198 | 8·07| 8·10|+1·31| +0·42 1896| 703| 923| 536| 41| 2203 | +389 | 6·73| 8·21|-0·03| +0·53 1897| 351| 780| 351| 520| 2002 | +188 | 6·23| 7·53|-0·53| -0·15 1898| 648| 564| 134| 513| 1859 | +45 | 7·07| 8·11|+0·31| +0·43 -----+-----+-----+-----+-----+-------+-------+-----+-----+-----+------ 1899| 527| 121| 133| 88| 869 | -945 | 4·28| 6·16|-2·48| -1·52 -----+-----+-----+-----+-----+-------+-------+-----+-----+-----+------ 1900| 442| 508| 603| 203| 1756 | -58 | 6·90| 7·13|+0·14| -0·55 1901| 627| 844| 364| 47| 1882 | +68 | 6·48| 7·45|-0·28| -0·23 1902| 248| 369| 468| 701| 1786 | -28 | 4·25| 6·40|-2·51| -1·28 1903| 472| 615| 476| 229| 1792 | -22 | 5·68| 7·30|-1·08| -0·38 1904| .. | .. | ..| ..| .. | .. | .. | .. | .. | .. =====+=====+=====+=====+=====+=======+=======+=====+=====+=====+======

Appendix Q.

TABLE LXXV.--_Station Addis Ababa._ (_Meteorological data_).

1902 =========+============+===============+===+=================+========= Month. | BAROMETER | THERMOMETER |Hu-| WIND |RAINFALL | | |mi-| |IN MILLI- | | |di-| | METRES +-----+------+----+----+-----+ty.+------+----+-----+--------- |Mean.|Varia-|Mean|Mean|Mean.| |Direc-| Ve-|Fall.| Varia- | | tion |max.|min.| | | tion.|loc-| | tion | | from | | | | | |ity.| | from | | nor- | | | | | | | | nor- | | mal. | | | | | | | | mal. ---------+-----+------+----+----+-----+---+------+----+-----+--------- January | .. | .. |24·3| 6·6| 15·4| ..| S | .. | 0 | .. February | .. | .. |22·0| 9·3| 15·6| ..|S 22 E| .. | 65 | .. March | .. | .. |24·4|10·2| 17·3| ..|S 24 E| .. | 37 | .. April | .. | .. |22·3|11·1| 16·7| ..|S 45 E| .. | 111 | .. May | .. | .. |22·7|10·3| 16·5| ..|S 45 E| .. | 61 | .. June | .. | .. |25·2| 9·9| 17·5| ..|S 45 E| .. | 142 | .. July | .. | .. |25·0|10·2| 17·6| ..|S 45 E| .. | 205 | .. August | .. | .. |24·8|10·0| 17·4| ..|S 45 E| .. | 167 | .. September| .. | .. |24·8| 9·8| 17·3| ..|S 45 E| .. | 129 | .. October | .. | .. |25·9| 6·9| 16·4| ..|S 88 E| .. | 16 | .. November | .. | .. |26·4| 5·5| 15·9| ..|S 86 E| .. | 9 | .. December | .. | .. |25·6| 4·5| 15·0| ..| E | .. | 39 | .. ---------+-----+------+----+----+-----+---+------+----+-----+--------- Mean | .. | .. |24·4| 8·7| 16·5| ..|S 47 E| .. | 981 | .. ---------+-----+------+----+----+-----+---+------+----+-----+--------- 1903 ---------+-----+------+----+----+-----+---+------+----+-----+--------- January | .. | .. |26·0| 8·7| 17·4| ..|S 51 E| .. | 32 | .. February | .. | .. |28·2| 8·3| 18·2| ..|S 42 E| .. | 25 | .. March | .. | .. |26·7|10·5| 18·6| ..|S 45 E| .. | 94 | .. April | .. | .. |27·8|10·0| 18·9| ..|S 45 E| .. | 88 | .. May | .. | .. |25·7|12·2| 18·9| ..|S 45 E| .. | 117 | .. June | .. | .. |24·4|10·0| 17·2| ..|S 45 E| .. | 191 | .. July | .. | .. |22·4|10·0| 16·2| ..|S 45 E| .. | 276 | .. August | .. | .. |21·6|10·5| 16·0| ..|S 29 E| .. | 248 | .. September| .. | .. |22·5| 9·7| 16·1| ..| S | .. | 222 | .. October | .. | .. |24·5| 7·3| 15·9| ..|S 80 E| .. | 28 | .. November | .. | .. |24·4| 5·0| 14·7| ..| E | .. | 0 | .. December | .. | .. |23·6| 6·5| 15·0| ..|N 88 E| .. | 18 | .. ---------+-----+------+----+----+-----+---+------+----+-----+--------- Mean | .. | .. |24·8| 9·1| 17·4| ..|S 53 E| .. |1339 | .. ---------+-----+------+----+----+-----+---+------+----+-----+--------- 1904 ---------+-----+------+----+----+-----+---+------+----+-----+--------- January | .. | .. |25·4| 4·6| .. | ..| | .. | 0 | .. February | .. | .. |25·9| 8·4| .. | ..| E | .. | 20 | .. March | .. | .. |26·2| 9·2| .. | ..|S 59 E| .. | 126 | .. April | .. | .. |26·6| 9·9| .. | ..|S 50 E| .. | 31 | .. May | .. | .. |27·4|10·1| .. | ..|N 80 E| .. | 41 | .. June | .. | .. | .. | .. | .. | ..|N 84 E| .. | .. | .. July | .. | .. | .. | .. | .. | ..| .. | .. | .. | .. August | .. | .. | .. | .. | .. | ..| .. | .. | .. | .. September| .. | .. | .. | .. | .. | ..| .. | .. | .. | .. October | .. | .. | .. | .. | .. | ..| .. | .. | .. | .. November | .. | .. | .. | .. | .. | ..| .. | .. | .. | .. December | .. | .. | .. | .. | .. | ..| .. | .. | .. | .. ---------+-----+------+----+----+-----+---+------+----+-----+--------- Mean | .. | .. | .. | .. | .. | ..| .. | .. | .. | .. =========+=====+======+====+====+=====+===+======+====+=====+=========

TABLE LXXVI.--_Station Wad Medani (Meteorological data)._

1902 =========+============+===============+===+=================+========= Month. | BAROMETER | THERMOMETER |Hu-| WIND |RAINFALL | | |mi-| |IN MILLI- | | |di-| | METRES +-----+------+----+----+-----+ty.+------+----+-----+--------- |Mean.|Varia-|Mean|Mean|Mean.| |Direc-| Ve-|Fall.| Varia- | | tion |max.|min.| | | tion.|loc-| | tion | | from | | | | | |ity.| | from | | nor- | | | | | | | | nor- | | mal. | | | | | | | | mal. ---------+-----+------+----+----+-----+---+------+----+-----+--------- January | .. | .. | .. | .. | .. | ..| .. | .. | .. | .. February | .. | .. | .. | .. | .. | ..| .. | .. | .. | .. March |756·2| .. |40·2|20·9| 30·6| 18|N 10 W| .. | 0 | .. April |756·6| .. |41·9|28·5| 35·2| 13| N | .. | 0 | .. May |757·2| .. |44·1|26·2| 35·2| 30|S 72 W| .. | 6 | .. June |757·5| .. |43·1|24·4| 33·8| 41|S 36 W| .. | 53 | .. July |758·9| .. |38·7|23·8| 31·2| 59|S 34 W| .. | 135 | .. August |758·1| .. |39·7|21·2| 30·4| 64|S 5 W| .. | 78 | .. September|758·4| .. |40·4|23·4| 31·9| 60|S 9 E| .. | 76 | .. October |758·2| .. |43·2|26·0| 34·6| 38|N 53 E| .. | 2 | .. November |758·3| .. |40·8|22·9| 31·8| 27|N 5 W| .. | 0 | .. December |759·9| .. |36·7|19·1| 27·9| 33|N 34 W| .. | 0 | .. ---------+-----+------+----+----+-----+---+------+----+-----+--------- Mean | .. | .. | .. | .. | .. | ..| .. | .. | 350 | .. ---------+-----+------+----+----+-----+---+------+----+-----+--------- 1903 ---------+-----+------+----+----+-----+---+------+----+-----+--------- January |760·3| .. |33·4|16·8| 25·1| 30|N 33 W| .. | 0 | .. February |760·8| .. |33·6|13·5| 23·6| 28|N 6 W| .. | 0 | .. March |758·4| .. |39·1|16·8| 28·0| 13|N 8 W| .. | 0 | .. April |755·2| .. |45·3|23·4| 34·4| 17|N 24 E| .. | 0 | .. May |756·6| .. |44·9|25·4| 35·2| 40|S 6 W| .. | 1 | .. June |757·3| .. |43·2|24·6| 33·9| 46|S 4 W| .. | 44 | .. July |757·8| .. |40·5|23·6| 32·0| 52|S 9 W| .. | 124 | .. August |757·6| .. |38·8|26·4| 30·6| 67|S 13 W| .. | 92 | .. September|758·2| .. |39·3|25·9| 32·6| 66|S 21 W| .. | 52 | .. October |757·4| .. |41·4|21·8| 31·6| 50|S 63 E| .. | 0 | .. November |758·0| .. |40·4|20·8| 30·6| 39|N 10 E| .. | 0 | .. December |758·2| .. |38·5|16·5| 27·5| 48|N 21 E| .. | 0 | .. ---------+-----+------+----+----+-----+---+------+----+-----+--------- Mean |758·0| .. |39·4|21·3| 30·4| 41|N 4 E| .. | 313 | .. ---------+-----+------+----+----+-----+---+------+----+-----+--------- 1904 ---------+-----+------+----+----+-----+---+------+----+-----+--------- January |758·2| .. |37·4|17·9| 27·6| 73|N 18 E| .. | 0 | 0 February |758·2| .. |36·3|15·8| 26·1| 40|N 1 W| .. | 0 | 0 March |756·3| -1·0 |40·4|17·7| 24·6| 22|N 10 E| .. | 0 | 0 April |756·8| +0·9 |41·9|20·6| 28·4| 12|N 3 W| .. | 0 | 0 May |756·6| -0·3 |42·5|24·3| 31·7| 27| S | .. | 40 | +36 June |757·9| +0·5 |42·1|12·3| 27·2| 41| S | .. | 0 | -49 July |757·7| -0·4 |39·5|14·3| 26·9| 43| S | .. | 70 | -40 August |758·2| +0·2 |40·9|22·4| 31·6| 61| S | .. | 67 | -12 September| .. | .. | .. | .. | .. | ..| .. | .. | .. | .. October | .. | .. | .. | .. | .. | ..| .. | .. | .. | .. November | .. | .. | .. | .. | .. | ..| .. | .. | .. | .. December | .. | .. | .. | .. | .. | ..| .. | .. | .. | .. ---------+-----+------+----+----+-----+---+------+----+-----+--------- Mean | .. | .. | .. | .. | .. | ..| .. | .. | .. | .. =========+=====+======+====+====+=====+===+======+====+=====+=========

TABLE LXXVII.--_Station Khartoum (Meteorological data)._

1902 =========+============+===============+===+=================+========= Month. | BAROMETER | THERMOMETER |Hu-| WIND |RAINFALL | | |mi-| |IN MILLI- | | |di-| | METRES +-----+------+----+----+-----+ty.+------+----+-----+--------- |Mean.|Varia-|Mean|Mean|Mean.| |Direc-| Ve-|Fall.| Varia- | | tion |max.|min.| | | tion.|loc-| | tion | | from | | | | | |ity.| | from | | nor- | | | | | | | | nor- | | mal. | | | | | | | | mal. ---------+-----+------+----+----+-----+---+------+----+-----+--------- January |759·4| 0 |28·7|14·2| 20·0| 26|N 4 E| 28 | 0 | .. February |758·3| -0·2 |34·7|19·1| 26·1| 18|N 17 E| 21 | 0 | .. March |756·1| -1·4 |38·0|21·3| 28·0| 14|N 12 E| ? | 0 | .. April |756·0| +1·2 |39·9|23·6| 31·0| 13|N 18 E| ? | 0 | .. May |754·8| +0·3 |43·0|27·2| 34·1| 19|N 63 W| 21 | 0 | .. June |756·0| +0·9 |41·5|26·5| 33·1| 27|S 12 W| 24 | 0 | .. July |757·1| +0·8 |39·0|23·4| 30·1| 47|S 4 W| 27 | 116 | .. August |756·2| -0·1 |39·1|24·7| 31·2| 46|S 12 W| 20 | 5 | .. September|756·8| +1·2 |39·5|24·8| 30·0| 41|S 23 W| 23 | 2 | .. October |757·4| +0·5 |38·1|22·7| 29·7| 30|N 13 E| 22 | 0 | .. November |758·1| +0·2 |29·1|18·7| 25·8| 26|N 30 E| 21 | 0 | .. December |759·6| +0·9 |29·3|13·7| 21·0| 28|N 24 E| 22 | 0 | .. ---------+-----+------+----+----+-----+---+------+----+-----+--------- Mean |757·1| +0·4 |36·7|21·7| 28·3| 28|N 33 E| 23 | 123 | .. ---------+-----+------+----+----+-----+---+------+----+-----+--------- 1903 ---------+-----+------+----+----+-----+---+------+----+-----+--------- January |760·0| +1·2 |26·9|11·6| 18·6| 31|N 8 E| 23 | 0 | .. February |761·5| +3·0 |28·2|12·6| 19·5| 32|N 8 W| 23 | 0 | .. March |760·5| +3·0 |32·6|15·1| 23·5| 18|N 15 W| 20 | 0 | .. April |757·0| +2·2 |39·9|20·8| 30·2| 18|N 37 E| 19 | 0 | .. May |757·7| +3·2 |40·9|24·7| 32·3| 28|S 43 E| 10 | 24 | .. June |757·4| +2·3 |41·4|25·8| 33·0| 28|S 7 W| 21 | 0 | .. July |758·1| +1·8 |38·7|25·1| 31·6| 36|S 1 W| 15 | 18 | .. August |758·1| +1·8 |37·5|24·3| 31·0| 44|S 30 W| 18 | 12 | .. September|758·9| +3·3 |38·0|20·9| 30·1| 40|S 12 W| 15 | 14 | .. October |758·6| +1·7 |38·7|22·8| 30·3| 32|N 2 W| 15 | 0 | .. November |759·9| +2·0 |36·9|20·9| 28·0| 32|N 15 E| 13 | 0 | .. December |760·0| +1·3 |34·9|18·0| 25·2| 34|N 22 E| 13 | 0 | .. ---------+-----+------+----+----+-----+---+------+----+-----+--------- Mean |759·0| +2·4 |36·2|20·2| 27·8| 31|N 18 E| 18 | 68 | .. ---------+-----+------+----+----+-----+---+------+----+-----+--------- 1904 ---------+-----+------+----+----+-----+---+------+----+-----+--------- January |760·2| +0·8 |31·7|16·3| 22·8| 33|N 15 E| 13 | 0 | .. February |760·4| +1·9 |31·9|16·6| 23·4| 26|N 6 E| 14 | 0 | 0 March |758·0| +0·5 |36·0|18·4| 26·6| 18|N 15 E| 17 | 0 | 0 April |758·0| +3·2 |38·8|20·2| 29·4| 16|N 1 E| 19 | 0 | 0 May |757·8| +3·3 |41·6|23·2| 32·6| 20|N 9 W| 17 | 0 | -- June |758·5| +3·4 |42·6|25·6| 33·3| 25|S 2 W| 15 | 0 | - 5 July |757·6| +1·3 |39·3|24·9| 32·1| 52|S 44 W| .. | 35 | -20 August |758·3| +1·6 |39·9|25·8| 32·8| 50|S 28 W| .. | 76 | +45 September| .. | .. | .. | .. | .. | ..| .. | .. | .. | .. October | .. | .. | .. | .. | .. | ..| .. | .. | .. | .. November | .. | .. | .. | .. | .. | ..| .. | .. | .. | .. December | .. | .. | .. | .. | .. | ..| .. | .. | .. | .. ---------+-----+------+----+----+-----+---+------+----+-----+--------- Mean | .. | .. | .. | .. | .. | ..| .. | .. | .. | .. =========+=====+======+====+====+=====+===+======+====+=====+=========

TABLE LXXVIII.--_Station Berber._ (_Meteorological data_).

1902 =========+============+===============+===+=================+========= Month. | BAROMETER | THERMOMETER |Hu-| WIND |RAINFALL | | |mi-| |IN MILLI- | | |di-| | METRES +-----+------+----+----+-----+ty.+------+----+-----+--------- |Mean.|Varia-|Mean|Mean|Mean.| |Direc-| Ve-|Fall.| Varia- | | tion |max.|min.| | | tion.|loc-| | tion | | from | | | | | |ity.| | from | | nor- | | | | | | | | nor- | | mal. | | | | | | | | mal. ---------+-----+------+----+----+-----+---+------+----+-----+--------- January | .. | .. | .. | .. | .. | ..| .. | .. | .. | .. February | .. | .. | .. | .. | .. | ..| .. | .. | .. | .. March |756·3| .. |39·0|20·0| 29·5| 26|N 5 E| .. | 0 | .. April |755·9| .. |39·4|20·5| 30·0| 14|N 5 E| .. | 0 | .. May |755·6| .. |45·5|25·9| 35·7| 13|N 14 E| .. | 0 | .. June |755·6| .. |44·8|26·7| 35·8| 16|N 20 E| .. | 0 | .. July |757·1| .. |42·2|25·3| 33·8| 32|S 82 W| .. | 0 | .. August | .. | .. |43·2|29·2| 36·2| 28|N 43 W| .. | 0 | .. September| .. | .. |48·3|26·9| 37·6| 31|S 23 W| .. | 0 | .. October | .. | .. |39·3|23·4| 31·4| 40|N 39 E| .. | 0 | .. November | .. | .. |35·3|19·0| 27·2| 34|N 5 W| .. | 0 | .. December | .. | .. |33·0|14·7| 23·8| 40|N 15 W| .. | .. | .. ---------+-----+------+----+----+-----+---+------+----+-----+--------- Mean | .. | .. | .. | .. | .. | ..| .. | .. | 0 | .. ---------+-----+------+----+----+-----+---+------+----+-----+--------- 1903 ---------+-----+------+----+----+-----+---+------+----+-----+--------- January | -- | .. |28·4|12·3| 20·4| 40|N 20 W| .. | 0 | .. February |761·6| .. |29·4|13·0| 21·2| 34|N 23 W| .. | 0 | .. March |759·2| .. |34·3|11·0| 22·6| 22|N 16 W| .. | 0 | .. April |756·2| .. |44·7|15·7| 28·7| 27|N 5 W| .. | 0 | .. May |756·4| .. |43·1|20·4| 31·8| 35|N 63 E| .. | 0 | .. June |755·6| .. |45·2|21·0| 33·1| 58|N 20 W| .. | 0 | .. July |756·0| .. |42·9|21·0| 32·0| 57|N 56 W| .. | 0 | .. August |755·6| .. |43·7|19·0| 31·4| 58|N 76 W| .. | 0 | .. September|757·1| .. |42·3|19·0| 30·6| 58|N 10 W| .. | 0 | .. October |757·6| .. |40·7|17·0| 28·8| 49|N 15 E| .. | 0 | .. November |758·9| .. |36·5|14·1| 25·2| 64|N 7 E| .. | 0 | .. December |758·9| .. |33·7|10·6| 22·2| 54|N 2 E| .. | 0 | .. ---------+-----+------+----+----+-----+---+------+----+-----+--------- Mean |755·6| .. |38·5|16·2| 27·3| 46|N 10 W| .. | 0 | .. ---------+-----+------+----+----+-----+---+------+----+-----+--------- 1904 ---------+-----+------+----+----+-----+---+------+----+-----+--------- January |759·1| .. | .. | .. | 20·9| 55| N | .. | -- | -- February |758·1| -- |34·7|13·3| 24·2| 48| N | .. | -- | -- March |755·7| -2·1 |35·0|16·4| 25·7| 35|N 2 W| .. | -- | -- April |756·4| +0·4 |38·3|19·7| 29·0| 19|N 3 E| .. | -- | -- May |756·3| +0·3 |41·8|24·9| 33·4| 25|N 9 E| .. | -- | -- June |756·2| +0·6 |43·2|26·0| 34·6| 18|N 20 W| .. | -- | -- July |755·8| -0·6 |42·1|27·0| 34·6| 33|S 16 W| .. | -- | -- August |756·4| -0·3 |42·1|26·1| 34·1| 26|S 77 W| .. | -- | -- September| .. | .. | .. | .. | .. | ..| .. | .. | .. | .. October | .. | .. | .. | .. | .. | ..| .. | .. | .. | .. November | .. | .. | .. | .. | .. | ..| .. | .. | .. | .. December | .. | .. | .. | .. | .. | ..| .. | .. | .. | .. ---------+-----+------+----+----+-----+---+------+----+-----+--------- Mean | .. | .. | .. | .. | .. | ..| .. | .. | .. | .. =========+=====+======+====+====+=====+===+======+====+=====+=========

TABLE LXXIX.--_Station Assuân_ (_Meteorological data_).

1902 =========+============+===============+===+=================+========= Month. | BAROMETER | THERMOMETER |Hu-| WIND |RAINFALL | | |mi-| |IN MILLI- | | |di-| | METRES +-----+------+----+----+-----+ty.+------+----+-----+--------- |Mean.|Varia-|Mean|Mean|Mean.| |Direc-| Ve-|Fall.| Varia- | | tion |max.|min.| | | tion.|loc-| | tion | | from | | | | | |ity.| | from | | nor- | | | | | | | | nor- | | mal. | | | | | | | | mal. ---------+-----+------+----+----+-----+---+------+----+-----+--------- January |765·6| .. |22·6| 8·5| 14·8| 50| N | 17 | 0 | .. February |764·4| .. |30·6|11·4| 20·1| 23| N | 17 | 0 | .. March |761·3| .. |31·7|13·4| 22·0| 25|N 8 W| 18 | 0 | .. April |760·2| .. |35·5|18·2| 26·6| 23|N 15 W| 17 | 0 | .. May |759·7| .. |41·6|23·9| 32·6| 16|N 5 W| 21 | 0 | .. June |757·7| .. |41·7|23·3| 32·4| 20|N 6 W| 19 | 0 | .. July |757·6| .. |41·3|24·0| 32·5| 20|N 50 W| 17 | 0 | .. August |757·2| .. |41·4|23·9| 32·5| 20|N 15 W| 18 | 0 | .. September|758·9| .. |41·2|23·9| 31·6| 32|N 18 W| 18 | 0 | .. October |761·9| .. |37·9|21·1| 28·5| 41|N 1 W| 18 | 0 | .. November |764·0| .. |29·0|14·2| 20·8| 43| N | 20 | 0 | .. December |766·6| .. |23·8| 9·2| 14·3| 52|N 2 W| 19 | 0 | .. ---------+-----+------+----+----+-----+---+------+----+-----+--------- Mean |761·3| .. |34·8|17·9| 25·7| 30|N 10 W| 18 | 0 | .. ---------+-----+------+----+----+-----+---+------+----+-----+--------- 1903 ---------+-----+------+----+----+-----+---+------+----+-----+--------- January |767·7| .. |22·0| 8·5| 13·6| 56| N | 17 | 0 | .. February |768·3| .. |23·7| 9·1| 15·1| 44| N | 19 | 0 | .. March |764·6| .. |28·1|12·7| 19·0| 38| N | 21 | 0 | .. April |760·1| .. |37·3|18·8| 26·3| 32| N | 22 | 0 | .. May |768·9| .. |40·9|22·9| 28·6| 35|N 4 E| 17 | 0 | .. June |757·5| .. |41·3|24·2| 31·6| 23|N 1 E| 22 | 0 | .. July |756·8| .. |41·5|24·3| 31·9| 22|N 1 W| 19 | 0 | .. August |756·2| .. |43·5|25·4| 31·7| 25| N | 21 | 0 | .. September|757·5| .. |41·4|22·3| 28·8| 30| N | 19 | 0 | .. October |758·6| .. |39·5|19·5| 26·4| 34| N | 19 | 0 | .. November |761·1| .. |34·6|14·9| 21·2| 38| N | 17 | 0 | .. December |761·5| .. |30·0|11·6| 17·8| 46| N | 17 | 0 | .. ---------+-----+------+----+----+-----+---+------+----+-----+--------- Mean |761·6| .. |35·3|17·8| 24·3| 35| N | 19 | 0 | .. ---------+-----+------+----+----+-----+---+------+----+-----+--------- 1904 ---------+-----+------+----+----+-----+---+------+----+-----+--------- January |762·3| .. |24·7| 8·1| 14·7| 48| N | 18 | 0 | .. February |762·5| .. |27·1|10·1| 16·8| 43| N | 17 | 0 | .. March |759·9| .. |31·1|13·1| 20·4| 31| N | 22 | 0 | .. April |758·8| .. |34·1|17·1| 24·3| 28|N 5 W| 19 | 0 | .. May |758·6| .. |36·5|19·9| 27·3| 26|N 5 E| 23 | 0 | .. June |757·8| .. |40·2|23·0| 31·2| 23|N 22 W| 19 | 0 | .. July |755·9| .. |40·4|24·4| 32·4| 27| N | .. | 0 | .. August |755·8| .. |36·1|23·7| 29·9| 34| N | .. | 0 | .. September| .. | .. | .. | .. | .. | ..| .. | .. | .. | .. October | .. | .. | .. | .. | .. | ..| .. | .. | .. | .. November | .. | .. | .. | .. | .. | ..| .. | .. | .. | .. December | .. | .. | .. | .. | .. | ..| .. | .. | .. | .. ---------+-----+------+----+----+-----+---+------+----+-----+--------- Mean | .. | .. | .. | .. | .. | ..| .. | .. | .. | .. =========+=====+======+====+====+=====+===+======+====+=====+=========

TABLE LXXX.--_Station Cairo_ (_Meteorological data_).

1902 =========+============+===============+===+=================+========= Month. | BAROMETER | THERMOMETER |Hu-| WIND |RAINFALL | | |mi-| |IN MILLI- | | |di-| | METRES +-----+------+----+----+-----+ty.+------+----+-----+--------- |Mean.|Varia-|Mean|Mean|Mean.| |Direc-| Ve-|Fall.| Varia- | | tion |max.|min.| | | tion.|loc-| | tion | | from | | | | | |ity.| | from | | nor- | | | | | | | | nor- | | mal. | | | | | | | | mal. ---------+-----+------+----+----+-----+---+------+----+-----+--------- January |765·5| +0·8 |17·2| 7·2| 11·3| 77|N 06 W| 6·5| 5 | -2 February |764·9| +1·0 |22·8| 8·8| 14·7| 69|N 28 W| 6·1| 6 | +3 March |761·8| -0·5 |24·2|10·1| 16·0| 62|N 48 W| 8·6| 1 | -4 April |760·4| -0·4 |28·8|13·4| 20·0| 56|N 10 W|10·9| 0 | -2 May |761·6| +1·2 |33·4|16·3| 23·9| 47|N 8 W|14·9| 0 | -2 June |759·6| -0·2 |35·1|18·6| 25·8| 50|N 20 W|11·4| 0 | 0 July |758·0| +0·6 |36·1|20·1| 27·0| 55|N 18 W| 4·3| 0 | 0 August |758·2| +0·3 |35·6|20·4| 26·8| 62|N 12 E| 5·0| 0 | 0 September|760·3| -0·4 |33·0|19·2| 24·9| 70|N 27 E| 3·7| 0 | 0 October |762·9| +0·5 |31·0|17·0| 22·8| 71|N 15 E| 5·6| 0 | -1 November |763·0| -1·3 |24·0|13·6| 17·9| 67|S 59 W| 3·1| 0 | -6 December |765·5| +0·8 |18·6| 8·5| 12·6| 69|S 35 W| 3·7| 1 | -5 ---------+-----+------+----+----+-----+---+------+----+-----+--------- Mean |761·8| +0·2 |28·3|14·4| 20·3| 63|N 24 W| 7·0| 13 | -19 ---------+-----+------+----+----+-----+---+------+----+-----+--------- 1903 ---------+-----+------+----+----+-----+---+------+----+-----+--------- January |767·2| +2·5 |17·7| 6·0| 10·7| 80|N 36 W| 5·1| 2 | -5 February |767·6| +3·7 |18·7| 6·2| 11·3| 72|S 68 W| 5·6| 2 | -1 March |764·2| +1·9 |22·3| 9·3| 14·7| 69|N 20 W| 7·7| 8 | +3 April |760·4| -0·4 |29·6|13·6| 20·3| 57|N 3 E| 9·3| 1 | -1 May |761·7| +1·3 |34·0|15·4| 22·6| 47|N 22 E|12·0| 0 | -2 June |759·4| -0·4 |34·8|18·5| 26·1| 49|N 21 E|12·0| 0 | 0 July |758·4| +1·0 |34·6|19·7| 26·1| 60|N 7 W|10·0| 0 | 0 August |757·8| -0·1 |34·7|20·7| 26·6| 62|N 14 W| 6·0| 0 | 0 September|761·4| +0·7 |30·7|18·1| 23·4| 72|N 4 W| 6·0| 0 | 0 October |763·7| +1·3 |28·0|15·1| 20·5| 74|N 10 E| 6·4| 0 | -1 November |764·9| +0·6 |23·1|10·7| 16·0| 68|N 12 E| 6·1| 0 | -6 December |764·3| -0·4 |20·1| 7·8| 12·8| 76|N 72 E| 4·4| 10 | +4 ---------+-----+------+----+----+-----+---+------+----+-----+--------- Mean |762·6| +1·0 |27·4|13·4| 19·3| 65|N 2 W| 7·5| 23 | -9 ---------+-----+------+----+----+-----+---+------+----+-----+--------- 1904 ---------+-----+------+----+----+-----+---+------+----+-----+--------- January |763·8| -0·9 |19·3| 6·9| 11·3| 73|N 39 E|18·5| 9 | +2 February |763·7| -0·2 |23·2| 7·6| 13·7| 74|S 26 W|16·6| 19 | +16 March |760·7| -1·6 |23·8| 9·6| 15·2| 73|N 51 W|16·6| 0 | -5 April |760·4| -0·4 |27·6|12·0| 18·5| 72|N 34 E|17·1| 16 | +14 May |760·4| 0 |31·7|15·4| 22·2| 65|N 29 W|14·8| 1 | 0 June |759·2| -0·6 |34·2|17·9| 25·0| 59|N 30 W|12·4| 0 | 0 July |756·6| -0·6 |34·9|19·5| 27·2| 68|N 8 W| .. | 0 | .. August |758·2| -0·6 |34·6|19·5| 27·0| 77|N 14 W| .. | 0 | .. September| .. | .. | .. | .. | .. | ..| .. | .. | .. | .. October | .. | .. | .. | .. | .. | ..| .. | .. | .. | .. November | .. | .. | .. | .. | .. | ..| .. | .. | .. | .. December | .. | .. | .. | .. | .. | ..| .. | .. | .. | .. ---------+-----+------+----+----+-----+---+------+----+-----+--------- Mean | .. | .. | .. | .. | .. | ..| .. | .. | .. | .. =========+=====+======+====+====+=====+===+======+====+=====+=========

TABLE LXXXI.--_Station Alexandria._

1902 =========+============+===============+===+=================+========= Month. | BAROMETER | THERMOMETER |Hu-| WIND |RAINFALL | | |mi-| |IN MILLI- | | |di-| | METRES +-----+------+----+----+-----+ty.+------+----+-----+--------- |Mean.|Varia-|Mean|Mean|Mean.| |Direc-| Ve-|Fall.| Varia- | | tion |max.|min.| | | tion.|loc-| | tion | | from | | | | | |ity.| | from | | nor- | | | | | | | | nor- | | mal. | | | | | | | | mal. ---------+-----+------+----+----+-----+---+------+----+-----+--------- January |764·5| +0·8 |18·3|10·3| 13·3| 70|N 52 W| 22 | 104 | +50 February |764·4| +1·4 |22·3|12·6| 15·9| 69|N 45 E| 18 | 8 | -14 March |761·3| -0·5 |20·6|13·0| 15·8| 68|N 15 W| 19 | 4 | -13 April |760·4| -1·1 |22·8|14·9| 17·8| 71|N 8 E| 18 | 5 | +3 May |762·0| +1·5 |26·8|18·2| 20·9| 64|N 20 E| 16 | 0 | -13 June |759·9| -0·6 |27·1|18·6| 22·1| 72|N 5 W| 17 | 0 | 0 July |758·1| +0·1 |30·4|21·7| 24·2| 73|N 28 W| 18 | 0 | 0 August |758·5| -0·1 |31·8|23·3| 25·1| 73|N 7 W| 18 | 0 | 0 September|760·4| -0·5 |32·4|22·5| 24·6| 70|N 6 E| 18 | 0 | -1 October |763·0| +0·4 |27·9|20·7| 23·0| 74|N 40 E| 16 | 5 | -4 November |762·2| -1·8 |23·4|15·2| 18·0| 72|N 60 W| 17 | 36 | -3 December |764·3| +0·4 |18·1|10·8| 13·5| 74|S 71 W| 23 | 92 | +12 ---------+-----+------+----+----+-----+---+------+----+-----+--------- Mean |761·6| 0 |25·2|16·9| 19·5| 71|N 11 W| 19 | 254 | +27 ---------+-----+------+----+----+-----+---+------+----+-----+--------- 1903 ---------+-----+------+----+----+-----+---+------+----+-----+--------- January |766·6| +2·9 |16·7| 9·8| 12·7| 78|N 6 E| 18 | 90 | +36 February |767·0| +4·0 |17·8|10·3| 13·2| 72|N 52 W| 18 | 34 | +12 March |763·8| +2·0 |19·5|11·8| 14·8| 72|N 4 E| 21 | 14 | -3 April |760·5| -1·0 |24·2|13·7| 17·1| 72|N 30 E| 21 | 1 | -2 May |762·2| +1·7 |25·9|16·8| 20·6| 70|N 25 E| 18 | 0 | -13 June |759·8| -0·7 |27·8|18·5| 22·0| 74| N | 22 | 0 | 0 July |758·5| +0·5 |29·1|20·1| 23·7| 74|N 22 W| 26 | 0 | 0 August |757·7| -0·9 |30·8|20·6| 24·4| 78|N 17 W| 21 | 0 | 0 September|761·4| +0·5 |30·0|18·9| 23·3| 68|N 2 W| 22 | 0 | -1 October |763·6| +1·0 |27·2|17·1| 21·0| 70|N 17 E| 21 | 0 | -9 November |764·5| +0·5 |23·6|13·1| 17·1| 72|N 2 E| 25 | 10 | -28 December |763·7| -0·2 |21·3|11·4| 15·2| 76|N 62 W| 18 | 24 | -57 ---------+-----+------+----+----+-----+---+------+----+-----+--------- Mean |762·4| +0·8 |24·5|16·0| 18·6| 73|N 5 W| 21 | 173 | -65 ---------+-----+------+----+----+-----+---+------+----+-----+--------- 1904 ---------+-----+------+----+----+-----+---+------+----+-----+--------- January |763·9| +0·2 |18·5| 9·1| 12·4| 76|N 3 E| 23 | 63 | +9 February |763·9| +0·9 |21·0|10·2| 13·8| 79|N 13 W| 21 | 13 | -10 March |760·8| -1·0 |21·2|11·4| 14·5| 77|N 8 E| 29 | 1 | -16 April |761·6| -0·1 |23·1|13·4| 16·2| 82|N 12 W| 28 | 2 | 0 May |761·5| +1·0 |26·2|16·3| 18·8| 85|N 3 W| 24 | -- | -13 June |760·4| -0·1 |28·5|19·2| 21·9| 83|N 12 W| 28 | 0 | - 0 July |756·5| +0·4 |30·2|21·0| 25·6| 73|N 40 W| 25 | 0 | -0 August |758·2| +0·5 |30·7|21·4| 26·0| 72|N 12 W| 25 | 1 | +1 September| .. | .. | .. | .. | .. | ..| .. | .. | .. | .. October | .. | .. | .. | .. | .. | ..| .. | .. | .. | .. November | .. | .. | .. | .. | .. | ..| .. | .. | .. | .. December | .. | .. | .. | .. | .. | ..| .. | .. | .. | .. ---------+-----+------+----+----+-----+---+------+----+-----+--------- Mean | .. | .. | .. | .. | .. | ..| .. | .. | .. | .. =========+=====+======+====+====+=====+===+======+====+=====+=========

INDEX

A Abai river, 13 Abu Zeid ford, 42 Abydos spring level, 67 Abyssinia, 13, 19, 43 Adarma, 45 Addis Ababa, 16, 20, 44, 214 Aird, Sir John, 75 Akobo, 37 Albert Lake, 11, 12, 14, 15, 18, 29, 30, 31 ---- ---- reservoir, 81, 82, 87, 90 ---- ---- tributaries, 31 Albert Nile in 1841, 38 ---- ---- catchment basin, 17, 119 ---- ---- description, 31-35 ---- ---- observed discharges, 129-134 ---- ---- discharges, 22, 56, 81, 82, 93 ---- ---- discharge table, 144, 145 ---- ---- gauges, 168-174 ---- ---- projects, 58, 81, 89-92 ---- ---- slopes, 14, 120 ---- ---- tributaries, 31, 32, 34 ---- ---- velocities, 15, 121 Alexandria, 20, 220 Ambatch, 31, 92 Amenemhat, 47, 66, 79 Analysis of water and soil, 62, 100-101 Anderson, Mr. Lang, 64 Appendices, 117 Arab, Bahr el, 36 Assiout Weir, 49, 150 Asua River, 32 Assuân gauge compared to Bombay rainfall, 213 ---- dam, 48, 61, 75, 76, 77, 87, 89 ---- distances from and to, 124, 125 ---- discharges, 25, 58-60, 139-142 ---- discharge table, 150 ---- gauges, 48, 52, 94, 97, 98, 153, 158, 164-166, 194-202, 209 ---- meteorological data, 20, 218 Atem river, 32, 33, 90 Atbara river, catchment basin, 17, 19, 119 ---- ---- description, 13, 45, 69 ---- ---- discharges, 24, 47, 58, 60, 138-140 ---- ---- discharge table, 149 ---- ---- gauges at Khashm el Girba, 188, 189 ---- ---- tributaries, 45

Baharia Oasis, 109 Baker, Sir Benjamin, 75 Baker, Sir Samuel, 11, 34, 39, 40 Barometric readings, 215-220 Barois, M. J., 61, 62 Barrages, The, 50, 53, 54, 74, 82, 99, 123, 124, 151, 152, 207, 208 Basalt, 22, 114 Basin irrigation, 59, 65, 66, 67, 68, 79, 93, 94, 99, 100, 159-166 ---- ---- in the Sudan, 102 Beadnell, Mr. H. G. F., 107 Beresford, Mr. J. S., 89 Berkeley, Fort, 31 Berber, 46, 217 ---- gauges, 190-193 Blue Nile, catchment basin, 17, 119 ---- ---- description, 12, 13, 18, 21, 41, 43, 61 ---- ---- observed discharges, 129, 136, 137 ---- ---- discharges, 24, 46, 57, 60, 139-141 ---- ---- discharge table, 147, 148 ---- ---- distances along, 128 ---- ---- gauges, 179-182, 183-187 ---- ---- projects, 43, 44, 103 ---- ---- slope, 15 ---- ---- tributaries, 44 ---- ---- velocities, 44 Bombay, 20, 213 Bor, 32, 89, 99 Brown, Sir Hanbury, 66, 77, 79, 89, 99

Cairo, 16, 20, 22, 24, 25, 50, 52, 53, 59, 94, 97, 98, 142, 150, 158, 164-166, 219 ---- gauges, 203-206, 210 Cassel, Sir Ernest, 75 Cataracts, 14, 46, 47, 48, 88, 102, 103 Catchment basins, 16, 18, 119 Chapters, 11, 26, 56, 73, 107 Chavanne, Joseph, 12 Chélu Bey, 5 Choga, Lake, 15, 28, 30, 121, 122 Clifton, Mr. C., 77 Climate of the Nile Valley, 18, 27, 102, 214-220 Congo forest, 29 Conversion tables for pics and metres, 211, 212 Corvée, 70 Cotton, 82, 88, 102, 103, 104 Course of the Nile, 12 Cretaceous, 111 Cromer, Lord, 100 Cultivated area of Egypt, 73

Dakhla Oasis, 107 Damer, El, 13, 45 Damietta branch, 14, 15, 53, 54, 60, 61, 70, 85, 123, 139, 140 ---- ---- discharge table, 152 ---- ---- gauges, 208 Darfur, 17 D’Arnaud, 38 De Gottberg, 47 De la Motte, 74 Didessa, 44 Dinder river, 17, 21, 44, 101 Diodorus Siculus, 78 Discharges observed, 129-138 Discharge table for Assuân, Assiout & Cairo, 150 ---- ---- ---- Damietta branch, 152 ---- ---- ---- Duem, 146 ---- ---- ---- Gondokoro, 144 ---- ---- ---- Khashm el Girba, 149 ---- ---- ---- Khartoum, 148 ---- ---- ---- Mongalla, 145 ---- ---- ---- Ripon Falls, 143 ---- ---- ---- Rosetta branch, 151 ---- ---- ---- Sobat river, 145 ---- ---- ---- Tewfikia, 146 ---- ---- ---- Wadelai, 144 ---- ---- ---- Wady Haifa, 151 Distances of places along the Damietta and Rosetta branches, 123 Distance Barrage to Assuân, 124 ---- Assuân to Khartoum, 125 ---- Khartoum to Gondokoro, 126 ---- Gondokoro to the Ripon Falls, 127 -- Khartoum to Rosaires, 128 Discharges, 18, 22, 56-60, 81-84, 90, 95, 139-142, 159-163 ---- Victoria Nile, 27 ---- Semliki river, 29 ---- Lake Albert, 29 ---- Albert Nile, 32-34 ---- Gazelle river, 35 ---- Zeraf river, 36 ---- Sobat river, 37 ---- White Nile, 41 ---- Blue Nile, 43-44 ---- Atbara, 45 Discharges Nile at Khartoum, 46 ---- ---- ---- Assuân, 49 ---- ---- ---- Cairo, 52 ---- ---- ---- Rosetta and Damietta branches, 55 Dongola, 47 Drainage, 69 Drury, Lt., R.N., 41 Duem, 42, 43, 46, 57, 135, 141, 146, 178 Dueru, Lake, 29 Dufile, 13, 31, 90 Dulaib Hilla. 37, 134, 145, 176 Dupuis, Mr. C., 5, 43, 44, 101, 103

Eads, Mr., 86 Edku, Lake, 64 Edward, Lake Albert, 12, 29 ---- ---- ---- tributaries, 29 Egypt, 25, 73, 85, 87, 88, 93, 99, 100 Emin Pasha, 40 Electrical development possible, 28, 29, 31, 103 Elephantine Island, 48 Eocene, 112 Esna shales, 112, Evaporation, 27, 30, 41, 43, 44, 96

Farafra, 110 Fayoum, The, 66, 79, 81 Fitzmaurice, Mr. Maurice, 75 Floods, 70, 71, 72, 85, 87, 88, 98 Foaden, Mr. G. P., 61, 63, 103 Fola Rapids, 14, 31 Fowera, 14, 28 Fuller, Mr. J. B., 69

Gaash river, 21, 45, 46, 101, 103 Gage’s channel, 34 Garak depression, 81 Garstin, Sir W. E., 5, 11, 12, 26, 29, 32, 41, 75, 82, 83, 85, 88, 89, 91, 92, 99, 101 Gauges, 48, 50, 51, 52, 53, 117, 153 ---- Assuân, 194-201, 209 ---- Assuân Reservoir, 202 ---- Berber, 190-193 ---- Cairo, 203-206 ---- Damietta branch, 208 ---- Duem, 178 ---- Dulaib Hilla, 176 ---- Gondokoro, 169-172 ---- Jinja, 166 ---- Khartoum, 183-187 ---- Khasm el Girba, 188-189 ---- Mongalla 173-174 ---- Nasser, 175 ---- Rosetta branch, 207 ---- Tewfikia, 177 ---- Wad Medani, 179-182 ---- Wadelai, 168 Gazelle river, 13, 15, 16, 17, 18, 19, 23, 35, 40, 56, 83, 129, 133 ---- ---- discharges, 139, 140 ---- ---- tributaries, 36 Gebel, Bahr-el-, 12 Gebelain, 42 Geology, 21, 110 Gessi Pasha, 40 Gezireh, 100, 102, 103 Ghaba Shambe, 32, 37, 41 Gold, 114 Gondokoro, 23, 32, 56, 90, 91, 119, 122, 126, 127, 139, 140, 141 ---- gauges, 169-172 ---- discharge table, 144 Gordon, 40 Gosrejeb, 45 Green water, 61 Granites, 21, 111

Hansard, Mr., 5 Herodotus, 78, 80 Hewat, Mr. Marshal, 77 Hillet Nuer, 33, 34, 40, 83, 84 Hughes, Mr. Frank, 64, 100

Ibrahim Effendi Fehmy, 105 Igneous rocks, 111 Infiltration, 53, 59, 60, 81, 84, 90 Introduction, 11 Irrigation, 65, 66, 68, 69, 93, 96, 97, 99, 102, 105, 106, 108, 109, 110, 159-163. Ismail Pasha Ayub, 40

Jinja gauge, 167

Kafr Zayat, 54 Kagera river, 12, 26, 28 Kalabsha, 74 Kamlin, 21, 24, 46 Kankar, 21 Karanain, 54 Kassala, 46 Kharga oasis, 109 Khartoum 13, 14, 15, 20, 21, 24, 43, 44, 46, 57, 60, 100, 135-142, 216 ---- distances to and from, 125, 126, 128 ---- discharge table, 148 ---- gauges, 183-187 Khasm el Girba, 45, 138 ---- discharge table, 149 ----- gauges 188, 189 Kit river, 32 Kom Ombos, 22, 113 Kordofan, 17 Kushesha, 78

Lado, 40 Lepsius, 47 Letheby, 61, 62 Linant Pasha, 42, 55 Limestone, 22, 114 ---- Nodular, 21 Lolle, 35, 84 Lombardini, Elia, 5, 11, 12, 38, 60 Luxor, 22 Lyons, Capt. H.G., 5, 11, 18, 21, 26, 27, 33, 44, 84

Mackenzie, Dr., 62 Manures, 63, 69 Marno, Signor, 40, 84 Martyr, Col., 41 Mean low water levels, 94, 158 Megahid channel, 35 Mehemet Ali, Viceroy, 38, 54, 68, 73, 74 Menes, 79 Meteorological data, 214-220 Miocene, 113 Mississippi river, 33 Mœris Lake, 66, 74, 76, 78, 81 Mongalla, 132 ---- discharge table, 145 ---- gauges, 173,174

Napoleon, 48 Nasser, 37 -- gauge, 175 Navigation, 14, 28, 32, 44 Nero, 38 Nile, The, 11, 12, 15, 16, 18, 21, 46, 47, 49, 56, 58-61, 67, 93, 99, 164-166 ---- discharge tables, 150,158 ---- distances along, 124, 125 ---- gauges, 190-206 ---- slopes, 120 ---- velocities, 121-122 Nitrates, 22, 69, 115 No, Lake, 14, 34, 35, 82, 83, 84 Nomenclature, 12

Oases, 107 Omdurman, 43

Papyrus, 31, 32, 42 Payen, Champion and Gastinel, 63 Peake, Major, R. A., 41 Peat, 21 Percolation, see Infiltration. Perennial irrigation, 59, 68, 69, 88, 93 Phosphates, 22, 115 Pibor river, 37 Pics converted to metres, 98, 209, 210 Plates, List of, 9 Pliocene, 113 Porphyry, 114 Projects, 44, 58, 73, 84 ---- Raising Assuân dam, 75 ---- Wady Rayan Reservoir, 76 ---- Lake Albert Reservoir and river training, 81 ---- Flood protection for Egypt, 85 ---- Complete for the Nile, 87 ---- Sir William Garstin’s projects, 89 ---- Conversion of basin to perennial irrigation, 93 ---- Development of the Sudan, 100 Prompt, M., 74

Rahad river, 17, 21, 44, 101 Rainfall, 17-21, 27, 30, 41, 43, 45, 56, 59, 103, 213 ---- tables, 214-220 Rameses, 48, 86 Red water, 61, 75 Reservoirs, 30, 73, 75, 76, 77 Ripon Falls, 12, 27, 28, 127, 139-141, 143, 166 Roda gauge, 50 ---- gauges, 203-206 Rohl river, 36 Rosaires, 13, 14, 44, 128 Rosetta branch, 14, 15, 33, 53, 60, 61, 85, 86, 87, 89, 139, 140 ---- ---- discharge table, 151 ---- ---- distances, 123 ---- ---- gauges, 207 ---- ---- velocities, 121 Ross, Col. Justin, 77 Rudolf, Lake, 16 Ruenzori, Mountain, 16, 21, 29

Salaama river, 13, 45 Sandstone, Nubian, 24, 112, 114 Sayce, Rev., Professor, 79 Schweinfurth, Dr., 36, 39, 85 Scott-Moncrieff, Sir Colin, 3, 74 Scour and deposit of silt, 44, 92, 95, 99 Semliki river, 12, 29 Sennaar, 14, 44 Semna Cataract, 47 Sesostris, 66 Settit river, 13, 45 Silsila, 21, 74, 112 Slopes, 14, 47, 48, 49, 53, 120, 157 Sobat River, 12, 13, 15, 23, 35, 36, 37, 56, 61, 82, 84, 119, 129, 134, 139-141 ---- ---- discharge table, 145 ---- ---- gauges, 175, 176 ---- ---- slopes, 120 ---- ---- velocities, 121 ---- ---- tributaries, 37 Soil analysis, 45, 61, 63, 64, 100, 101 Sparkes, Col., 40 Speke and Grant, 11 Strabo, 78 Storage, see Projects Suakin-Khartoum railway, 100 Subject matter, 7, 8 Subsoil water, 63, 67 Sudan, 88, 100, 102, 103, 105, 106 Sudd region, 13, 16, 33, 34, 35, 37, 38, 39, 41, 56, 57, 58, 82, 83

Temperatures, 19, 20, 21, 214-220 Tewfikieh, 41, 134, 139, 140, 141 ---- discharge table, 146 ---- gauge, 177 Thebes, 67 Tributaries of Lake Albert, 31 ---- ---- the Albert Nile, 31, 32, 34 ---- ---- ---- Atbara, 45 ---- ---- ---- Blue Nile, 44 ---- ---- ---- Lake Edward, 29 ---- ---- ---- Gazelle river, 36 ---- ---- ---- Sobat river, 36 ---- ---- ---- Lake Victoria, 28 ---- ---- ---- Victoria Nile, 29 Trough of the Nile, cubic contents, 155 Tsana Lake, 13, 15, 43, 45, 88, 103, 129 Tumat river, 44

Uganda, 29, 130

Velocities, 14, 33, 45, 49, 121 Victoria, Lake, 11, 12, 14, 17, 18, 26 ---- ---- discharge table, 143 ---- ---- gauges, 167 ---- ---- tributaries, 28 Victoria Nile, 12, 14, 15, 22, 28, 130, 139, 140, 141 ---- ---- discharge table, 143 ---- ---- gauges, 167 ---- ---- distances, 127 ---- ---- slopes, 120 ---- ---- tributaries, 29 ---- ---- velocities, 121 Vœlcker, Dr., 64

Wadelai, 16, 31, 90, 139-141 ---- discharge table, 144 ---- gauges, 168 Wad Medani, 20, 44, 136, 137, 215 ---- ---- discharge table, 147 ---- ---- gauges, 179-182 Wady Halfa, 14, 15, 48, 139-141 Wadi Halfa discharge table, 151 Wady Natrûn, 115 Wady Rayan, 74, 76, 77, 80, 81, 85, 87, 88 Water, Analysis of, 62, 63, 67 Watersheds, 16 Webb, Mr. A., 89 Weeds, 29 Wells, 108 Werne, M., 38 Western, Lt.-Col. J. H., 74, 77 White Nile, 12, 13, 15, 16, 18, 19, 23, 32, 36, 38, 41, 43, 46, 56, 60, 61, 84, 119, 129, 134, 135, 139-141 ---- ---- distances on 126 ---- ---- discharge tables, 146 ---- ---- gauges, 177, 178 ---- ---- slope, 120 ---- ---- velocities, 121 Whitehouse, Commander, 26 Whitehouse, Mr. Cope, 74 Winds, 19, 20, 27, 214-220

Yei river, 34

Zeraf river, 13, 33, 34, 36-40, 84, 92, 94, 129, 133 ---- discharges, 36, 133

Transcriber’s Notes

Inconsistent, archaic and unusual transcriptions, spelling, hyphenation, punctuation, use of accents, etc. (including in names) and repeated information have been retained (even when occurring on the same page or in the same sentence), except as mentioned below. The use of periods, mid-level decimal points and commas in numbers has not been standardised.

Plate II: the data as mentioned in the errata have not been corrected in the Plate.

Page 51-52, table, last column: 199 and 1877 are not in the range of years under consideration.

Page 97, table header: the years are out of order, possibly erroneously.

Page 203: the table header does not appear to agree with the contents; presumably, the first group of rows refers to 1876.

Page 209, column Pic 16, row 14: 4·11 does not fit with the other data and may be an error for 8·11

In the source document, the Plates are not always printed in numerical order (see also the List of Plates), this has not been changed.

Unless mentioned below under “Changes Made”, all (tabulated or text) data and calculations are presented as printed in the source document, even when there are obvious errors or inconsistencies in these data or calculations.

Changes made

Some footnotes, tables and illustrations moved; some tables re- arranged. Some minor obvious typos have been corrected silently. R.L. and R. L. have been standardised as R. L., spaces between numbers and percent signs have been removed where present. Appendices: the numbering of some of the tables has been corrected, some minor lay-out inconsistencies have been resolved. page 12: Afrika’s Ströme and Flüsse changed to Afrikas Ströme und Flüsse page 32: Fort Barkeley changed to Fort Berkeley as elsewhere page 36: 15. The Sobat River changed to 16. The Sobat River page 70, Section 30: italics changed to bold as with other headings page 72, calculations: Total materials taken out of category Materials not paid for page 74: Mehemet Aly changed to Mehemet Ali as elsewhere page 119: Absynian Hills changed to Abyssinian Hills page 128, table header: column 2, Gondokoro changed to Khartoum; column 3, Khartoum changed to Rosaires page 129-130: these pages were reversed in the printed book page 145: Dulab Hilla changed to Dulaib Hilla as elsewhere page 160: Sobagia changed to Sohagia; Shekha changed to Shekhia pages 168, 175-178, 188-189, 194, 202-203, 207-208 table headings: names of months have been abbreviated Index (to conform to text): Kashm changed to Khasm as in text (several times); Emim Pasha changed to Emin Pasha.