Part 1. Geometry on Paper--Part 2. Solidity, Weight, and

Pressure--Part 3. Trigonometry, Vision, and Surveying Instruments.

_A Practical Treatise on Coal Mining._ By George G. André, F.G.S., Assoc. Inst. C.E., Member of the Society of Engineers. _With_ 82 _lithographic plates_. 2 vols., royal 4to, cloth, 3_l_. 12_s_.

_Sugar Growing and Refining_: a Comprehensive Treatise on the Culture of Sugar-yielding Plants, and the Manufacture, Refining, and Analysis of Cane, Beet, Maple, Milk, Palm, Sorghum, and Starch Sugars, with copious statistics of their production and commerce, and a chapter on the distillation of Rum. By Charles G. Warnford Lock, F.L.S., &c., and G. W. Wigner and R. H. Harland, FF.C.S., FF.I.C. _With_ 205 _illustrations_, 8vo, cloth, 30_s_.

_Spons’ Information for Colonial Engineers._ Edited by J. T. Hurst. Demy 8vo, sewed.

No. 1. Ceylon. By Abraham Deane, C.E. 2_s_. 6_d_.

CONTENTS:

Introductory Remarks--Natural Productions--Architecture and Engineering--Topography, Trade, and Natural History--Principal Stations--Weights and Measures, etc., etc.

No. 2. Southern Africa, including the Cape Colony, Natal, and the Dutch Republics. By Henry Hall, F.R.G.S., F.R.C.I. With Map. 3_s_. 6_d_.

CONTENTS:

General Description of South Africa--Physical Geography with reference to Engineering Operations--Notes on Labour and Material in Cape Colony--Geological Notes on Rock Formation in South Africa--Engineering Instruments for Use in South Africa--Principal Public Works in Cape Colony: Railways, Mountain Roads and Passes, Harbour Works, Bridges, Gas Works, Irrigation and Water Supply, Lighthouses, Drainage and Sanitary Engineering, Public Buildings, Mines--Table of Woods in South Africa--Animals used for Draught Purposes--Statistical Notes--Table of Distances--Rates of Carriage, etc.

No. 3. India. By F. C. Danvers, Assoc. Inst. C.E. With Map. 4_s_. 6_d_.

CONTENTS:

Physical Geography of India--Building Materials--Roads--Railways--Bridges--Irrigation--River Works--Harbours--Lighthouse Buildings--Native Labour--The Principal Trees of India--Money--Weights and Measures--Glossary of Indian Terms, etc.

_A Practical Treatise on Casting and Founding_, including descriptions of the modern machinery employed in the art. By N. E. Spretson, Engineer. Third edition, with 82 _plates_ drawn to scale, 412 pp., demy 8vo, cloth, 18_s_.

_The Clerk of Works_: a Vade-Mecum for all engaged in the Superintendence of Building Operations. By G. G. HOSKINS, F.R.I.B.A. Third edition, fcap. 8vo, cloth, 1_s._ 6_d._

_Tropical Agriculture_; or, the Culture, Preparation, Commerce, and Consumption of the Principal Products of the Vegetable Kingdom, as furnishing Food, Clothing, Medicine, etc., and in their relation to the Arts and Manufactures; forming a practical treatise and Handbook of Reference for the Colonist, Manufacturer, Merchant, and Consumer, on the Cultivation, Preparation for Shipment, and Commercial Value, etc., of the various Substances obtained from Trees and Plants entering into the Husbandry of Tropical and Sub-Tropical Regions. By P. L. SIMMONDS. Second edition, revised and improved, 515 pages, 8vo, cloth, 1_l._ 1_s._

_Steel: its History, Manufacture, and Uses._ By J. S. JEANS, Secretary of the Iron and Steel Institute. 860 pages and _24 plates_, 8vo, cloth, 36_s._

_American Foundry Practice_: Treating of Loam, Dry Sand, and Green Sand Moulding, and containing a Practical Treatise upon the Management of Cupolas, and the Melting of Iron. By T. D. WEST, Practical Iron Moulder and Foundry Foreman. Second edition, _with numerous illustrations_, crown 8vo, cloth, 10_s._ 6_d._

_The Maintenance of Macadamised Roads._ By T. CODRINGTON, M.I.C.E, F.G.S., General Superintendent of County Roads for South Wales. 8vo, cloth, 6_s._

_Hydraulic Steam and Hand Power Lifting and Pressing Machinery._ By FREDERICK COLYER, M. Inst. C.E., M. Inst. M.E. _With 73 plates_, 8vo, cloth, 18_s._

_Pumps and Pumping Machinery._ By F. COLYER, M.I.C.E., M.I.M.E. _With 23 folding plates_, 8vo, cloth, 12_s._ 6_d._

_Tables of the Principal Speeds occurring in Mechanical Engineering_, expressed in metres in a second. By P. KEERAYEFF, Chief Mechanic of the Obouchoff Steel Works, St. Petersburg; translated by SERGIUS KERN, M.E. Fcap. 8vo, sewed, 6_d._

_Girder Making and the Practice of Bridge Building in Wrought Iron_, illustrated by Examples of Bridges, Piers, and Girder Work, etc., constructed at the Skerne Iron Works, Darlington, by EDWARD HUTCHINSON, M. Inst. M.E. _With 35 plates_, demy 8vo, cloth, 10_s._ 6_d._

_Spons’ Dictionary of Engineering, Civil, Mechanical, Military, and Naval_; with technical terms in French, German, Italian, and Spanish, 3100 pp., and _nearly 8000 engravings_, in super-royal 8vo, in 8 divisions, 5_l._ 8_s._ Complete in 3 vols., cloth, 5_l._ 5_s._ Bound in a superior manner, half-morocco, top edge gilt, 3 vols., 6_l._ 12_s._ _See page 15._

_A Treatise on the Origin, Progress, Prevention, and Cure of Dry Rot in Timber_; with Remarks on the Means of Preserving Wood from Destruction by Sea-Worms, Beetles, Ants, etc. By THOMAS ALLEN BRITTON, late Surveyor to the Metropolitan Board of Works, etc., etc. _With 10 plates_, crown 8vo, cloth, 7_s._ 6_d._

_Metrical Tables._ By G. L. MOLESWORTH, M.I.C.E. 32mo, cloth, 1_s._ 6_d._

CONTENTS.

General--Linear Measures--Square Measures--Cubic Measures--Measures of Capacity--Weights--Combinations--Thermometers.

_A Handbook of Electrical Testing._ By H. R. KEMPE, Member of the Society of Telegraph Engineers. New edition, revised and enlarged, _with 81 illustrations_. Crown 8vo, cloth, 12_s._ 6_d._

_Electro-Telegraphy._ By FREDERICK S. BEECHEY, Telegraph Engineer. A Book for Beginners. _Illustrated._ Fcap. 8vo, sewed, 6_d._

_Handrailing: by the Square Cut._ By JOHN JONES, Staircase Builder. Fourth edition, _with seven plates_, 8vo, cloth, 3_s._ 6_d._

_Handrailing: by the Square Cut._ By JOHN JONES, Staircase Builder. Part Second, with eight plates, 8vo, cloth, 3_s._ 6_d._

_The Gas Consumer’s Handy Book._ By WILLIAM RICHARDS, C.E. _Illustrated._ 18mo, sewed, 6_d._

_Steam Pleating for Buildings_; or, Hints to Steam Fitters, being a description of Steam Heating Apparatus for Warming and Ventilating Private Houses and large Buildings; with Remarks on Steam, Water, and Air in their relation to Heating; to which are added miscellaneous Tables. By J. W. BALDWIN, Steam Heating Engineer. _With many illustrations._ Second edition, crown 8vo, cloth, 10_s._ 6_d._

_A Pocket-Book of Useful Formulæ and Memoranda for Civil and Mechanical Engineers._ By GUILFORD L. MOLESWORTH, Mem. Inst. C.E., Consulting Engineer to the Government of India for State Railways. _With numerous illustrations_, 744 pp. Twenty-first edition, revised and enlarged, 32mo, roan, 6_s._

SYNOPSIS OF CONTENTS:

Surveying, Levelling, etc.--Strength and Weight of Materials--Earthwork, Brickwork, Masonry, Arches, etc.--Struts, Columns, Beams, and Trusses--Flooring, Roofing, and Roof Trusses--Girders, Bridges, etc.--Railways and Roads--Hydraulic Formulæ--Canals, Sewers, Waterworks, Docks--Irrigation and Breakwaters--Gas, Ventilation, and Warming--Heat, Light, Colour, and Sound--Gravity: Centres, Forces, and Powers--Millwork, Teeth of Wheels, Shafting, etc.--Workshop Recipes--Sundry Machinery--Animal Power--Steam and the Steam Engine--Water-power, Water-wheels, Turbines, etc.--Wind and Windmills--Steam Navigation, Ship Building, Tonnage, etc.--Gunnery, Projectiles, etc.--Weights, Measures, and Money--Trigonometry, Conic Sections, and Curves--Telegraphy--Mensuration--Tables of Areas and Circumference, and Arcs of Circles--Logarithms, Square and Cube Roots, Powers--Reciprocals, etc.--Useful Numbers--Differential and Integral Calculus--Algebraic Signs--Telegraphic Construction and Formulæ.

_Spons’ Tables and Memoranda for Engineers_; selected and arranged by J. T. HURST, C.E., Author of ‘Architectural Surveyors’ Handbook,’ ‘Hurst’s Tredgold’s Carpentry,‘ etc. Fifth edition, 64mo, roan, gilt edges, 1_s._; or in cloth case, 1_s._ 6_d._

This work is printed in a pearl type, and is so small, measuring only 2½ in. by 1¾ in. by ¼ in. thick, that it may be easily carried in the waistcoat pocket.

“It is certainly an extremely rare thing for a reviewer to be called upon to notice a volume measuring but 2½ in. by 1¾ in., yet these dimensions faithfully represent the size of the handy little book before us. The volume--which contains 118 printed pages, besides a few blank pages for memoranda--is, in fact, a true pocket-book, adapted for being carried in the waistcoat pocket, and containing a far greater amount and variety of information than most people would imagine could be compressed into so small a space.... The little volume has been compiled with considerable care and judgment, and we can cordially recommend it to our readers as a useful little pocket companion.”--_Engineering._

_Analysis, Technical Valuation, Purification and Use of Coal Gas._ By the Rev. W. R. BOWDITCH, M.A. _With wood engravings_, 8vo, cloth, 12_s._ 6_d._

Condensation of Gas--Purification of Gas--Light--Measuring--Place of Testing Gas--Test Candles--The Standard for Measuring Gas-light--Test Burners--Testing Gas for Sulphur--Testing Gas for Ammonia--Condensation by Bromine--Gravimetric Method of taking Specific Gravity of Gas--Carburetting or Naphthalizing Gas--Acetylene--Explosions of Gas--Gnawing of Gaspipes by Rats--Pressure as related to Public Lighting, etc.

_A Practical Treatise on Natural and Artificial Concrete, its Varieties and Constructive Adaptations._ By HENRY REID, Author of the ‘Science and Art of the Manufacture of Portland Cement.’ New Edition, _with 59 woodcuts and 5 plates_, 8vo, cloth, 15_s._

_Hydrodynamics_: Treatise relative to the Testing of Water-Wheels and Machinery, with various other matters pertaining to Hydrodynamics. By JAMES EMERSON. _With numerous illustrations_, 360 pp. Third edition, crown 8vo, cloth, 4_s._ 6_d._

_The Gas Analyst’s Manual._ By F. W. HARTLEY, Assoc. Inst. C.E., etc. _With numerous illustrations._ Crown 8vo, cloth, 6_s._

_Gas Measurement and Gas Meter Testing._ By F. W. HARTLEY. Fourth edition, revised and extended. _Illustrated_, crown 8vo, cloth, 4_s._

_The French-Polishers Manual._ By a French-Polisher; containing Timber Staining, Washing, Matching, Improving, Painting, Imitations, Directions for Staining, Sizing, Embodying, Smoothing, Spirit Varnishing, French-Polishing, Directions for Repolishing. Third edition, royal 32mo, sewed, 6_d._

_Hops, their Cultivation, Commerce, and Uses in various Countries._ By P. L. SIMMONDS, Crown 8vo, cloth, 4_s._ 6_d._

_A Practical Treatise on the Manufacture and Distribution of Coal Gas._ By WILLIAM RICHARDS. Demy 4to, with _numerous wood engravings and 29 plates_, cloth, 28_s._

SYNOPSIS OF CONTENTS:

Introduction--History of Gas Lighting--Chemistry of Gas Manufacture, by Lewis Thompson, Esq., M.R.C.S.--Coal, with Analyses, by J. Paterson, Lewis Thompson, and G. R. Hislop. Esqrs.--Retorts, Iron and Clay--Retort Setting--Hydraulic Main--Condensers--Exhausters--Washers and Scrubbers--Purifiers--Purification--History of Gas Holder--Tanks, Brick and Stone, Composite, Concrete, Cast-iron, Compound Annular Wrought-iron--Specifications--Gas Holders--Station Meter--Governor--Distribution--Mains--Gas Mathematics, or Formulæ for the Distribution of Gas, by Lewis Thompson, Esq.--Services--Consumers’ Meters--Regulators--Burners--Fittings--Photometer--Carburization of Gas--Air Gas and Water Gas-Composition of Coal Gas, by Lewis Thompson, Esq.--Analyses of Gas--Influence of Atmospheric Pressure and Temperature on Gas--Residual Products--Appendix--Description of Retort Settings, Buildings, etc., etc.

_Practical Geometry and Engineering Drawing_; a Course of Descriptive Geometry adapted to the Requirements of the Engineering Draughtsman, including the determination of cast shadows and Isometric Projection, each chapter being followed by numerous examples; to which are added rules for Shading, Shade-lining, etc., together with practical instructions as to the Lining, Colouring, Printing, and general treatment of Engineering Drawings, with a chapter on drawing Instruments. By GEORGE S. CLARKE, Lieut. R.E., Instructor in Mechanical Drawing, Royal Indian Engineering College. _20 plates_, 4to, cloth, 15_s._

_The Elements of Graphic Statics._ By Professor KARL VON OTT, translated from the German by G. S. CLARKE, Lieut. R.E., Instructor in Mechanical Drawing, Royal Indian Engineering College. _With 93 illustrations_, crown 8vo, cloth, 5_s._

_The Principles of Graphic Statics._ By GEORGE SYDENHAM CLARKE, Lieut. Royal Engineers. _With 112 illustrations._ 4to. cloth, 12_s._ 6_d._

_The New Formula for Mean Velocity of Discharge of Rivers and Canals._ By W. R. KUTTER. Translated from articles in the ‘Cultur-Ingenieur,’ by LOWIS D’A. JACKSON, Assoc. Inst. C.E. 8vo, cloth, 12_s._ 6_d._

_Practical Hydraulics_; a Series of Rules and Tables for the use of Engineers, etc., etc. By THOMAS BOX. Fifth edition, _numerous plates_, post 8vo, cloth, 5_s._

_A Practical Treatise on the Construction of Horizontal and Vertical Waterwheels_, specially designed for the use of operative mechanics. By WILLIAM CULLEN, Millwright and Engineer. _With 11 plates._ Second edition, revised and enlarged, small 4to, cloth, 12_s._ 6_d._

_Aid Book to Engineering Enterprise Abroad._ By EWING MATHESON, M. Inst. C.E. The book treats of Public Works and Engineering Enterprises in their inception and preliminary arrangement; of the different modes in which money is provided for their accomplishment; and of the economical and technical considerations by which success or failure is determined. The information necessary to the designs of Engineers is classified, as are also those particulars by which Contractors may estimate the cost of works, and Capitalists the probabilities of profit. _Illustrated_, 2 vols., 8vo, 12_s._ 6_d._ each.

_The Essential Elements of Practical Mechanics; based on the Principle of Work_, designed for Engineering Students. By Oliver Byrne formerly Professor of Mathematics, College for Civil Engineers. Third edition, _with 148 wood engravings_, post 8vo, cloth, 7_s._ 6_d._

CONTENTS:

Chap. I. How Work is Measured by a Unit, both with and without reference to a Unit of Time--Chap. 2. The Work of Living Agents, the Influence of Friction, and introduces one of the most beautiful Laws of Motion--Chap. 3. The principles expounded in the first and second chapters are applied to the Motion of Bodies--Chap. 4. The Transmission of Work by simple Machines--Chap. 5. Useful Propositions and Rules.

_The Practical Millwright’s and Engineer’s Ready Reckoner_; or Tables for finding the diameter and power of cog-wheels, diameter, weight, and power of shafts, diameter and strength of bolts, etc. By Thomas Dixon. Fourth edition, 12mo, cloth, 3_s._

_Breweries and Maltings_: their Arrangement, Construction, Machinery, and Plant. By G. Scamell, F.R.I.B.A. Second edition, revised, enlarged, and partly rewritten By F. Colyer, M.I.C.E., M.I.M.E. _With 20 plates_, 8vo, cloth, 18_s._

_A Practical Treatise on the Manufacture of Starch, Glucose, Starch-Sugar, and Dextrine_, based 011 the German of L. Von Wagner, Professor in the Royal Technical School, Buda Pesth, and other authorities. By Julius Frankel; edited by Robert Hutter, proprietor of the Philadelphia Starch Works. _With 58 illustrations_, 344 pp., 8vo, cloth, 18_s._

_A Practical Treatise on Mill-gearing, Wheels, Shafts, Riggers, etc._; for the use of Engineers. By Thomas Box. Third edition, _with 11 plates_. Crown 8vo, cloth, 7_s._ 6_d._

_Mining Machinery_: a Descriptive Treatise on the Machinery, Tools, and other Appliances used in Mining. By G. G. André, F.G.S., Assoc. Inst. C.E., Mem. of the Society of Engineers. Royal 4to, uniform with the Author’s Treatise on Coal Mining, containing _182 plates_, accurately drawn to scale, with descriptive text, in 2 vols., cloth, 3_l._ 12_s._

CONTENTS:

Machinery for Prospecting, Excavating, Hauling, and Hoisting--Ventilation--Pumping--Treatment of Mineral Products, including Gold and Silver, Copper, Tin, and Lead, Iron, Coal, Sulphur, China Clay, Brick Earth, etc.

_Tables for Setting out Curves for Railways, Canals, Roads, etc._, varying from a radius of five chains to three miles. By A. Kennedy and R. W. Hackwood. _Illustrated_, 32mo, cloth, 2_s._ 6_d._

_The Science and Art of the Manufacture of Portland Cement_, with observations on some of its constructive applications. _With 66 illustrations_. By Henry Reid, C.E., Author of ‘A Practical Treatise on Concrete,’ etc., etc. 8vo, cloth, 18_s._

_The Draughtsman’s Handbook of Plan and Map Drawing_; including instructions for the preparation of Engineering, Architectural, and Mechanical Drawings. _With numerous illustrations in the text, and 33 plates (15 printed in colours)._ By G. G. André, F.G.S., Assoc. Inst. C.E. 4to, cloth, 9_s._

CONTENTS:

The Drawing Office and its Furnishings--Geometrical Problems--Lines, Dots, and their Combinations--Colours, Shading, Lettering, Bordering, and North Points--Scales--Plotting--Civil Engineers’ and Surveyors’ Plans--Map Drawing--Mechanical and Architectural Drawing--Copying and Reducing Trigonometrical Formulæ, etc., etc.

_The Boiler-maker’s and Iron Ship-builder’s Companion_, comprising a series of original and carefully calculated tables, of the utmost utility to persons interested in the iron trades. By James Foden, author of ‘Mechanical Tables,’ etc. Second edition revised, _with illustrations_, crown 8vo, cloth, 5_s._

_Rock Blasting_: a Practical Treatise on the means employed in Blasting Rocks for Industrial Purposes. By G. G. André, F.G.S., Assoc. Inst. C.E. _With 56 illustrations and 12 plates_, 8vo, cloth, 10_s._ 6_d._

_Surcharged and different Forms of Retaining Walls._ By J. S. Tate. _Illustrated_, 8vo, sewed, 2_s._

_A Treatise on Ropemaking as practised in public and private Rope-yards_, with a Description of the Manufacture, Rules, Tables of Weights, etc., adapted to the Trade, Shipping, Mining, Railways, Builders, etc. By R. Chapman, formerly foreman to Messrs. Huddart and Co., Limehouse, and late Master Ropemaker to H.M. Dockyard, Deptford. Second edition, 12mo, cloth, 3_s._

_Laxton’s Builders’ and Contractors’ Tables_; for the use of Engineers, Architects, Surveyors, Builders, Land Agents, and others. Bricklayer, containing 22 tables, with nearly 30,000 calculations. 4to, cloth, 5_s._

_Laxton’s Builders’ and Contractors’ Tables._ Excavator, Earth, Land, Water, and Gas, containing 53 tables, with nearly 24,000 calculations. 4to, cloth, 5_s._

_Sanitary Engineering_: a Guide to the Construction of Works of Sewerage and House Drainage, with Tables for facilitating the calculations of the Engineer. By Baldwin Latham, C.E., M. Inst. C.E., F.G.S., F.M.S., Past-President of the Society of Engineers. Second edition, _with numerous plates and woodcuts_, 8vo, cloth, 1_l._ 10_s._

_Screw Cutting Tables for Engineers and Machinists_, giving the values of the different trains of Wheels required to produce Screws of any pitch, calculated by Lord Lindsay, M.P., F.R.S., F.R.A.S., etc. Royal 8vo, cloth, oblong, 2_s._

_Screw Cutting Tables_, for the use of Mechanical Engineers, showing the proper arrangement of Wheels for cutting the Threads of Screws of any required pitch, with a Table for making the Universal Gas-pipe Threads and Taps. By W. A. Martin, Engineer. Second edition, royal 8vo, oblong, cloth, 1_s._, or sewed, 6_d._

_A Treatise on a Practical Method of Designing Slide-Valve Gears by Simple Geometrical Construction_, based upon the principles enunciated in Euclid’s Elements, and comprising the various forms of Plain Slide-Valve and Expansion Gearing; together with Stephenson’s, Gooch’s, and Allan’s Link-Motions, as applied either to reversing or to variable expansion combinations. By Edward J. Cowling Welch, Memb. Inst. Mechanical Engineers. Crown 8vo, cloth, 6_s._

_Cleaning and Scouring_: a Manual for Dyers, Laundresses, and for Domestic Use. By S. Christopher. 18mo, sewed, 6_d._

_A Handbook of House Sanitation_; for the use of all persons seeking a Healthy Home. A reprint of those portions of Mr. Bailey-Denton’s Lectures on Sanitary Engineering, given before the School of Military Engineering, which related to the “Dwelling,” enlarged and revised by his Son, E. F. Bailey-Denton, C.E., B.A. _With 140 illustrations_, 8vo, cloth, 8_s._ 6_d._

_Treatise on Valve-Gears_, with special consideration of the Link-Motions of Locomotive Engines. By Dr. Gustav Zeuner. Third edition, revised and enlarged, translated from the German, with the special permission of the author, by Moritz Müller. _Plates_, 8vo, cloth, 12_s._ 6_d._

_A Pocket-Book for Boiler Makers and Steam Users_, comprising a variety of useful information for Employer and Workman, Government Inspectors, Board of Trade Surveyors, Engineers in charge of Works and Slips, Foremen of Manufactories, and the general Steam-using Public. By Maurice John Sexton. Second edition, royal 32mo, roan, gilt edges, 5_s._

_The Strains upon Bridge Girders and Roof Trusses_, including the Warren, Lattice, Trellis, Bowstring, and other Forms of Girders, the Curved Roof, and Simple and Compound Trusses. By Thos. Cargill, C.E.B.A.T., C.D., Assoc. Inst. C.E., Member of the Society of Engineers. _With 64 illustrations, drawn and worked out to scale_, 8vo, cloth, 12_s._, 6_d._

_A Practical Treatise on the Steam Engine_, containing Plans and Arrangements of Details for Fixed Steam Engines, with Essays on the Principles involved in Design and Construction. By Arthur Rigg, Engineer, Member of the Society of Engineers and of the Royal Institution of Great Britain. Demy 4to, _copiously illustrated with woodcuts and 96 plates_, in one Volume, half-bound morocco, 2_l._ 2_s._; or cheaper edition, cloth, 25_s._

This work is not, in any sense, an elementary treatise, or history of the steam engine, but is intended to describe examples of Fixed Steam Engines without entering into the wide domain of locomotive or marine practice. To this end illustrations will be given of the most recent arrangements of Horizontal, Vertical, Beam, Pumping, Winding, Portable, Semi-portable, Corliss, Allen, Compound, and other similar Engines, by the most eminent Firms in Great Britain and America. The laws relating to the action and precautions to be observed in the construction of the various details, such as Cylinders, Pistons, Piston-rods, Connecting-rods, Cross-heads, Motion-blocks, Eccentrics, Simple, Expansion, Balanced, and Equilibrium Slide-valves, and Valve-gearing will be minutely dealt with. In this connection will be found articles upon the Velocity of Reciprocating Parts and the Mode of Applying the Indicator, Heat and Expansion of Steam Governors, and the like. It is the writer’s desire to draw illustrations from every possible source, and give only those rules that present practice deems correct.

_Barlow’s Tables of Squares, Cubes, Square Roots, Cube Roots, Reciprocals of all Integer Numbers up to 10,000._ Post 8vo, cloth, 6_s._

_Camus (M.) Treatise on the Teeth of Wheels_, demonstrating the best forms which can be given to them for the purposes of Machinery, such as Mill-work and Clock-work, and the art of finding their numbers. Translated from the French, with details of the present practice of Millwrights, Engine Makers, and other Machinists, by Isaac Hawkins. Third edition, _with 18 plates_, 8vo, cloth, 5_s._

_A Practical Treatise on the Science of Land and Engineering Surveying, Levelling, Estimating Quantities, etc._, with a general description of the several Instruments required for Surveying, Levelling, Plotting, etc. By H. S. Merrett. Third edition, _41 plates with illustrations and tables_, royal 8vo, cloth, 12_s._ 6_d._

PRINCIPAL CONTENTS: