Essays on the Microscope Containing a Practical Description of the Most Improved Microscopes, a General History of Insects, etc., etc.

Part 55

Chapter 553,470 wordsPublic domain

Musca flava; on flowers

Musca solstitialis; on thistles

Tabanus bovinus, great horse fly

Tabanus pluvialis; in meadows

Culex pipiens, common gnat, see page 187 note, 623

Culex bifurcatus; in watery places

Culex pulicaris; in gardens in the spring

Conops calcitrans, differs from the common fly, in having a sharp hard proboscis, with which it strikes our legs in autumn

Conops macrocephala; in meadows

Asilus craboniformis, hornet fly; in wet meadows

Asilus forcipatus; in gardens

Asilus morio; in wet woods

Bombylius major, humble bee fly, sucks flowers without resting on them

Bombylius medius; hovers in the air like a hawk, and darts with great celerity

Bombylius minor; in Caen wood, near Hampstead

Hippobosca equina; fastens on dogs and cattle

Hippobosca hirundinis; in swallows’ nests

7. _Aptera._

Lepisma saccharina; in the joints of sash windows that are wet and seldom opened

Podura viridis; on plants in April

Podura plumbea; on trees, solitary

Podura villosa; on stones

Podura aquatica; numerous on the leaves of aquatic plants

Termes pulsatorium, the death-watch of Linnæus, p. 688, note

Pediculus humanus, common louse, see p. 619

Pediculus pubis, crab louse

Pediculus bovis, cattle

Pediculus vituli, ibid.

Pediculus corvi, raven

Pediculus gallinæ, capon

Pediculus columbæ, pidgeon

Pulex irritans; see page 616

Acarus reduvius, sheep louse or tick

Acarus ricinus, dog tick

Acarus passerinus; on many species of small birds

Acarus aquaticus; on stagnant water, swims quick

Acarus holosericeus, scarlet spider; on the ground and on plants

Acarus coleoptratorum, beetle-tick; hundreds are found on the belly of a beetle

Acarus longicornis; under stones, &c.

Phalangium opilio, long-legged spider

Phalangium cancroides, scorpion tick; on garden pots, sometimes in houses

Aranea cucurbitina; on fruit trees

Aranea labyrinthica; in fields

Aranea domestica, house spider

Aranea redimita; in gardens

Aranea senaculata, large; on walls, &c.

Aranea scenica, black; on old walls and windows; spins no web

Aranea aquatica, pale brown

Aranea viatica, resembles a crab, moves slow, &c.

Cancer pisum, pea, size of a pea; in mussels

Cancer minutus, minute, smaller than the preceding; among sea weeds

Cancer longicornis, long horned, size of the last

Cancer plati-cheles, great clawed, size of a horse bean

Cancer Bernardus, hermit; in the deserted shells of wilks, &c.

Cancer gammarus, lobster

Cancer homarus; on the coast of Ireland

Cancer astacus, cray-fish

Cancer serratus, prawn

Cancer squilla, white shrimp

Cancer crangon, shrimp

Cancer linearis, linear shrimp

Cancer atomos, atom shrimp

Cancer locusta, locust; frequently skipping in summer on the sea shore

Cancer mantis; Weymouth

Cancer pulex, water flea; in rivulets

Cancer salinus; in Lymington salt water

Monoculus apis; in fish ponds and ditches

Monoculus pulex, very minute; frequent and numerous in stagnant water

Monoculus quadricornis

Oniscus asilus, sea louse

Oniscus entomon, sea wood-louse; on the coasts

Oniscus aquaticus; in clear springs

Oniscus asellus, millepes or wood louse; in old walls, &c.

Oniscus armadillo; under stones

Julus terrestris, feet 200; under stones

Julus sabulosus, feet 240

VERMES.

1. _Intestina._

Gordius aquaticus, like a horse hair; in water and clay

Gordius lacustris; in the liver of the pike

Ascaris vermicularis; at the bottom of lakes, and in the intestines of children and horses

Ascaris lumbricoides; in the human intestines

Lumbricus terrestris, earth worm; in the ground and in the human intestines

Lumbricus marinus, sea worm

Fasciola hepatica, gourd worm; in ditches, rivulets, and in the liver of sheep

Fasciola intestinalis; in the intestines of fishes

Fasciola barbata; in the intestines of the sepia loligo

Sepunculus nudus; in the sea

Hirundo medicinalis, common leech; in shallow waters

Hirundo sanguisuga, horse leech; in fresh water

Hirundo geometra; in fresh water

Hirundo muricata, sea leech

2. _Mollusca._

Limax ater, black snail; in moist shady places

Limax rufus, red; at the foot of mountains

Limax maximus, large grey; in thick woods

Limax agrestis, small grey; on cabbages

Limax flavus, amber; on plants

Doris argo, sea lemon

Doris verrucosa; Aberdeen

Doris elutrina; Anglesea

Aphrodita acculeata, sea mouse; often found in the stomach of a cod

Aphrodita squamata; Anglesea

Aphrodita minuta; ibid.

Nereis noctiluca, scarce visible to the naked eye; shines by night in the sea, so as to make the water appear on fire

Nereis locustris; in clayey water

Ascidia rustica; Scarborough

Actinea sulcata; rocks of Cornwall and Anglesea

Holothuria pentactes; in the deep

Lernea cyprinacea; in fishponds, adhering to the sides of carp

Lernea salmonea; adheres to the gills of salmon

Lernea asellina; in the gills of cod, &c.

Sepia officinalis, ink or cuttlefish; in the sea

Sepia sepiola; off Flintshire

Medusa cruciata

Medusa aurita, sea nettle

Medusa capillata, sea lungs

Asterias rubens, five-fingered star fish

Asterias glacialis, common ditto

Asterias oculata, dotted ditto

Asterias minuta; Denbigh

Asterias hastata; Cornwall

Asterias nigra; ibid.

Echius esculentus, sea hedgehog; on the coast, near Scarborough

Echius spatagus, sea egg; on the Yorkshire coast

3. _Testacca_.

Chiton crinitus, hairy chiton; Aberdeen

Chiton marginatus; in the sea, at Scarborough

Chiton levis, lock broom; West Ross, North Britain

Lepas. Animal, triton

Lepas balanus; adhering to rocks and shells

Lepas balanoides, acorn fish; frequently adheres to oysters

Lepas tintinabulum; on bottoms of ships

Lepas anatifera, barnacle, see page 344

Pholas. Animal, ascidia

Pholas dactylus, piddock; in stones, shines by night

Pholas crispatus; frequent on the Yorkshire coast

Solen. Animal, ascidia

Solen siliqua; frequent on the shore near Scarborough

Solen vagina; Anglesea

Solen pellucidus; ibid.

Solen legumen; ibid.

Tellina. Animal, tethys

Tellina cornea, size of a pea; in pools of fresh water

Cardium Animal, tethys

Cardium echinatum; on the Yorkshire coast

Cardium edule, common cockle

Mactra. Animal, tethys

Mactra solida; on the Yorkshire coast

Mactra lutraria; sea, at the mouth of rivers

Donax. Animal, tethys

Donax trunculus; on the coast near Scarborough

Ostrea maxima, large scallop; on the Irish coast, and near Portland

Ostrea obliterata, small scallop

Ostrea edulis, common oyster

Anomia truncata; in limestones

Anomia crispa; in bluish limestone, in Craven, and other parts

Anomia squamula; on oysters, crabs, and lobsters

Anomia ephipium; adhering to oyster shells

Mytilus. Animal, ascidia

Mytilus rugosus; in lime-stone

Mytilus edulis, common muscle

Mytilus cygneus; in many lakes in the north

Buccinum. Animal, limax

Buccinum lapillus, larger English purple fish; on the shore

Buccinum minimum, less than a pea

Helix, snails. Animal, limax

Helix lapicida; in woods in Lincolnshire

Helix planorbis; in rivulets

Helix cornea; in still rivers and pools

Helix vivipera; ibid.

Helix putris; in rivers and pools

Serpula. Animal, terebella.

Serpula spirorbis; adheres to sea weeds on the coast

Sabella. Animal, nereis

Sabella alviolata, English tubular sand coral; on the Yarmouth coast, and on Peington strand, Devon

4. _Lithophyta._

Coral, calcareous, fixed, built by animals

Madrepora. Coral, with cavities, lamellosa-stellated. Animal, medusa

Madrepora musicalis; on the Irish coast

Millepora. Animal, hydra

Millepora fascialis, stony foliaceous coralline; adhering to an oyster shell, on the coast of the Isle of Wight

Cellepora, coral, submembranaceous, composed of round shells. Animal, hydra

Cellepora pumicosa, appears in the microscope like a pumice-stone; found on the sickle coralline, like white sand

5. _Zoophyta._

Gorgonia placomus, warted sea fan; on the Cornish coast

Gorgonia anceps, sea willow

Gorgonia flabellum, Venus fan

Alcyonium. Florets, hydræ, between the cortex; epidermis vesicular, porous

Alcyonium digitatum, dead-man’s hand; frequently taken up by fishermen trawling for flat fish on the Kentish coast

Alcyonium schlosseri; on the Cornish coast

Alcyonium ficus, sea-fig; near Sheerness

Spongia oculata, branched sponge; on the coast

Spongia dicotoma, forked sponge; on the Cornish and Yorkshire coasts

Spongia lacustris, creeping sponge; at the bottom of lakes in Westmoreland

Spongia fluviatilis, river sponge; in the Thames, Cam, &c.

Flustra foliacea, broad-leaved horn-wrack; on the coast

Tubularia indivisa, tubular coralline

Tubularia ramosa, small rarified tubular coralline

Tubularia fistulosa, bugle coralline

Tubularia campanulata, creeping, extremely minute

Corallina officinalis, coralline of the shops; fixed to rocks and shells, by stony joints

Corallina rubens, crested or coxcomb coralline, like moss in round tufts, resembling a bird’s crest; the microscope shews the filaments to be dichotomous

Corallina corniculata, white slender-jointed coralline; adheres to small fuci

Sertularia rosacea, lily-flowering oralline; on oysters

Sertularia pumila, sea-oak coralline; about Sheerness

Sertularia abietina, sea-fir; on oysters, muscles, &c.

Sertularia argentea, squirrel’s tail; on oysters in the Isle of Shepey

Sertularia cornuta, very minute--with many others

Vorticella, see page 396 & seq.

Hydra, see page 363 & seq.

Tænia solium; in the intestines of various animals

Tænia vulgaris, common tapeworm; in the intestines of men and brutes

Animalcula infusoria, see page 428 & seq.[170]

[170] Those who are desirous of seeing well delineated and elegantly coloured figures of a variety of curious objects among the insect class, particularly such as require investigation by the microscope, will be amply gratified by having recourse to Donovan’s History of British Insects. From the Naturalists Miscellany, by G. Shaw, M. D. F. R. & Vice Pres. L. S. numbers of beautiful subjects may likewise be selected.

II. FOSSILS.

Ketton or kettering stone

Spar opake; in mines in Wales, Derbyshire, &c.

Spar refracting; in lead mines in Derbyshire, &c.

Spar diaphonous; in various parts of the kingdom

Spar stalactitical, Knaresborough, &c.

Fluor transparent, diaphonous resembling emeralds, saphires, topazes, amethysts, &c.

METALS.

Aurum nativum; said to be found in some rivers in North Britain

Argentum mineralizatum; in small quantities in lead and copper ores

Plumbum galena, lead glance; in various parts of England

Plumbum stibiatum, antimonial lead ore

Plumbum crystallinum, lead crystals

Plumbum spatosum, lead spar

Plumbum calciforme, lead ochre

Plumbum nativum, native lead

Cuprum nativum

Cuprum cæruleum montanum, mountain blue; in the mines of Derbyshire

Cuprum viride montanum, mountain green; in copper mines of England, Ireland, and the Isle of Man

Cuprum rubrum, glass copper ore; generally found with native copper

Cuprum cinereum, grey copper ore

Ferrum crystallinum, crystalline ore; Forest of Dean, Langron in Cumberland

Ferrum cærulescens, bluish ore

Ferrum micaceum, glimmer

SEMI-METALS.

Vismutum ochra, flowers of bismuth

Vismutum mineralizatum, bismuth ore

Antimonium striatum, striated antimonial ore

Antimonium rubrum, red antimonial ore

PETREFACTIONS.

Animals, or parts of animals, changed into a fossile substance

_Vermes._

Helmintholithus ammonita, nautilus; in strata of earth and stones, on the sea-shore, &c.

Helmintholithus anomites; in great abundance, particularly at Sherborne in Gloucestershire

Helmintholithus gryphites; in chalk hills, &c.

Helmintholithus judaicus; in many parts, particularly chalk pits in Kent

Helmintholithus echinites; Surrey, Essex, Kent, Middlesex, in chalk and gravel pits

Helmintholithus astrion, sea-star; in chalk pits, &c.

Helmintholithus astroites, star stone; Gloucestershire, Norfolk, &c. and many more.

_Vegetables._

Phytolithus plantæ; grass, reeds, horse-tail, &c. found in the black slate called plate, immediately above the pit coal, in various parts of England.

Phytolithus filices, ferns; ditto, Newcastle, &c.

Rhizolithus, roots of trees and plants buried in the earth

Lithophyllum, leaves of trees; at Knaresborough, also impressed in stone

Carpolithus, fruits, particularly impressions of the cones of pines, hazel, oak

_Fishes._

Ichthyolithus siliquastra, fossile pods, often resembling half the pod of a lupine, &c. sometimes extremely minute, at other times near two inches long.

Ichthyolithus vertebra, of various genera, often in pits and quarries, particularly at Richmond in Surrey, on the cliffs of Shepey Island, &c.

_Insects._

Enthomolithus cancri, claws, or parts of claws; in pits in several parts of England

_Shrubs._

Graptolithus dentrides, representing shrubs, plants, or moss; on various stones, slates, and flints, in many parts of England, &c.

III. VEGETABLES.

Having thus enumerated a considerable variety of articles in the animal and fossile kingdoms, the only part which remains to be noticed is that of vegetables. To any person possessing but a superficial knowledge of botany, it must be obvious that this branch of natural history is extensive in the extreme; and that, consequently, to point out but a small number of such plants as form interesting objects for the microscope, would greatly extend this list, already sufficiently large; for,

“How incompetent is human effort to portray the beauties of this sublime subject! How inadequate the most descriptive talent to approximate to our view the vegetative profusion contained within the recess of nature! How limited have been our public researches! How contracted the knowledge which has been as yet obtained! What an incomprehensible store remains yet concealed, impenetrable to mortal view!”[171]

[171] Observations on the Structure and Economy of Plants, by R. Hooper, M. D., F. L. S. page 128. This work contains an ingenious display of the analogy which subsists between the animal and the vegetable kingdom.

From a source so abundant, the botanist will be under no difficulty in selecting for himself; those who have not made the science a part of their studies, will be materially assisted by having recource to the elegant figures and their descriptions in the Botanical Magazine, by W. Curtis, F. L. S. the well-known author of Flora Londinensis; and English Botany, by J. E. Smith, M. D. F. R. & Pres. L. S. published by Ja^{s}. Sowerby, F. L. S. I shall, therefore, just mention in general terms those parts of plants which are peculiarly adapted for microscopical investigation. These are as follow:

The trunk, composed of Epidermis or cuticle Cortex or outer bark Liber or inner bark Alburnum Lignum or wood Medulla or pith The root cut transversely or longitudinally Leaves and their fibres The parts of fructification, consisting of The calyx or flower cup corolla or foliation, containing the leaves or petals, and the nectarium stamina or threads, their filaments and anthera or summit, and the pollen contained therein[172] The pistillum or pointal, its germen, style, and stigma pericarpium, seed vessel, or germen grown to maturity semina, seeds and their parts receptaculum, the base on which the fructification is seated

[172] The pollen or meal is a fine dust designed for the impregnation of the germen; a small quantity of this meal being put into hot water and applied to the microscope, will exhibit the bursting of the elastic covering of each grain; and the escape of the smaller atoms, which is the true farina.

Of the various classes of plants, that called cryptogamia is eminently calculated for microscopical observation; comprizing the filices, the musci, the algæ, and the fungi. On these subjects Hedwig has produced a valuable work, entitled Theoria Generationis et Fructificationis de Plantarum Cryptogamicarum, of which a new and much improved edition has just appeared, and to which for further information I refer the reader.

A LIST OF MR. CUSTANCE’S VEGETABLE CUTTINGS, THAT USUALLY ACCOMPANY THE MOST COMPLETE SORT OF MICROSCOPES MADE BY MESSRS. W. AND S. JONES.

English oak. Evergreen ditto. Norway oak. Ash. Cedar. Cork. Savin. Fir. Ceanothus. Hazel. Lime. Elm. Elm root. Mulberry ditto. Grape root. Lime ditto. Beech. Birch. Plum. Ivy. Spanish elder. American climber. Cissampelos. Virgin’s bower. Magnolia grandiflora. Gelder-rose. Althæa frutex. Tulip tree. Ash. Spanish chesnut. Platanus orientalis. Viburnum lantana. Oak root. Ash root. Asp root. Walnut ditto. Grape vine. Indian turpeth. China root. Jasmine. Dog rose. Raspberry. Barberry. Briar. Elder root. Ditto branch. Willow root. Ditto branch. Mulberry. Fig. Sycamore. Maple. American dogwood. Ptelea trifoliata. Ligneous night-shade. Sumach. Apricot. Medlar. Bay. Laurel. Sea weed. Longitudinal cutting of plane tree. Ditto of Spanish elder. Ditto of briar. Common cane. Ditto with curious center. Bamboo cane. Sarsaparilla. Longitudinal cuttings of sugar cane. Elder. Rose tree. Mugwort. *Longitudinal slices of elder. *Ditto grape vine. *Transverse ditto. *Dogwood. *Plane tree. *Beech. *Grape vine. *Spanish chesnut. *Walnut. *Fig. *Ditto longitudinal. Asparagus. Artichoke. Thistle. Fennel. Parsley. Ditto root. Sunflower. Ditto root. Agrimony. Eryngo. Potatoe stalk. Centaurea. Indian reed. Ditto corn. Amaranthus. Bromelia pinguin. Campanula. Monkshood. Lavatera. Solidago. Mugwort. Chrysanthemum. Helianthus. Wormwood. Bulrush. Portugal reed. Burdock. Ditto. Wild mustard. Aloe flower stalk. Solomon’s seal. Tulip. Calamus aromaticus. Buckbean. Gourd. Melon. Crown imperial. Flower-de-luce. Pine apple. White lily. Asparagus. Ragwort. Water flag. Sugar cane. Stems of leaves of hog’s fennel. Hemlock. Chesnut. Wild turnip. Stems of the leaves of red dock. Horse-radish. Cabbage. Carrots. Roots of phytolacca. Teasel. Carrot. Fennel. Stinging-nettle roots curiously variegated. Roots of parsley and wormwood variegated. Stalks of fern, with variations.

N. B. Those marked with an * Mr. Custance conceives prove Dr. Hill in an error, when he observed, that the pith of a shoot is not connected with the pith of the branch. See his Construction of Timber, &c. p. 103, 8vo edition.

SALTS, AND VARIOUS CHEMICAL PREPARATIONS.

SALTS.

Salt ammoniac, crude Salt ammoniac, volatile Salt of amber Salt of Benjamin, commonly called flowers of Benjamin Salt of berberry Salt of buckthorn Salt of butcher’s broom Salt of carduus Salt of chamomile Salt of coral Salt of cucumber Salt, Epsom, so called Salt of fennel Salt gem Salt, glauber’s, vitriolated natron Salt of hartshorn Salt of lavender Salt of lead, commonly called sugar of lead Salt of limons Salt of liquorice Salt of millepedes Salt of mugwort Salt of nitre, or salt petre Salt of Peruvian bark Salt polychrest Salt Rochelle Salt of tartar Salt of tartar vitriolated Salt of tobacco Salt of urine Salt of wood sorrel Salt of wormwood, and a great variety of others.[173]

[173] To ascertain the true configurations of salts, particular attention should be paid to obtain them genuine; it may therefore be proper to apprize the reader, that some of those above enumerated are not easily procured in that state; consequently, though they exhibit pleasing figures, yet they may not be those of the real salt purposed to be investigated. Many hundred weights of some salts are annually manufactured, and sold under names very different from what they really are. Nor is this circumstance confined to salts only: for want of botanical knowledge, preparations of different plants have been frequently sold possessed of medical properties very different from those intended. A valuable medicine, the extract of Hemlock, for instance, instead of being prepared of the conium maculatum, has been made in large quantities of the chærophyllum sylvestre, and thus administered! On this unpleasant subject I could enlarge, were it not digressing from that before us. Whilst such evils exist, need we wonder if the physician as well as the patient are often disappointed in the beneficial effects expected from the adhibition of medicines?

PREPARATIONS OF MERCURY.

Acetated quicksilver Calcined ditto Calomel Muriat, commonly called corrosive sublimate Red nitrated, or red precipitate Sulphurated, or factitious cinnabar

MISCELLANEOUS.

Camphor Crystals (called cream) of tartar Iron, ammoniacal, or martial flowers Verdigrise, ditto distilled Vitriol, blue, or vitriolated copper Vitriol, green, or vitriolated Iron Vitriol, white, or vitriolated zinc, &c. &c.

After having particularized so many of the works of NATURE, let us now pay some attention to those of ART. But what an humiliating contrast shall we meet with! If our design in viewing objects by the microscope be to discover beauty, harmony, and perfection, it will be necessary to limit our inquiries to the former, happily alone sufficiently abundant; if, on the contrary, we are desirous of discovering deformity and imperfection, we must confine ourselves to the latter. Even those works of art that appear to the unassisted eye as decisive proofs of consummate skill in the workman, and which excite our admiration for their apparent neatness and accuracy, when brought to this test, exhibit their real state; and, consequently, tend but to display the inferiority of the most finished performance of the ablest artist, when put in competition with the glorious productions of nature. The finest works of the loom and of the needle, if exhibited with the microscope, prove so rude and coarse, that were they to appear thus to the naked eye, so far from affording delight to our belles, would be rejected with disgust. But the more we inquire into the works of nature, the more fully are we satisfied of their divine origin: in a flower, for instance, we see how fibres too minute for the unassisted sight are composed of others still more minute, till the primordial threads or first principles are utterly indiscernible; whilst the whole substance presents a celestial radiance in its colouring, with a richness so superior to silver or gold, as if it were intended for the cloathing of an angel, and we have the highest authority for asserting, that the greatest monarch of the East in all his glory, was not arrayed like one of these. A very few specimens of art will, therefore, suffice.

The edge of the sharpest razor or penknife Teeth of rasps and files Threads of the finest screws Finest engravings on gold, silver, copper, &c. Coins, medals Seals, intaglios Best executed miniature paintings, prints, drawings, &c. The finest laces, silks, and ribbons Smallest needles, pins, &c. Woolen and linen cloth, plain or printed; camblets, bombazeens, &c. A drop of ink on paper Paper, from the coarsest to the finest The writing of the ablest penman The finest specimens of the typographic art, &c. &c.

An inspection of a few of the above articles only will clearly demonstrate, that as in the moral and political world, so in the works of art, perfection is unattainable by mortal man. With the fullest impression of which truth in the mind of the editor, and an appeal to the candour of his readers towards those imperfections which they may have discovered in this performance, he shall now conclude with,

FINIS.

ADDITIONS.