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, 12s. 6d.

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, 5s.

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, 12s. 6d.

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, 12s. 6d. 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, 7s. 6d.

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, 3s.

Breweries and Maltings: their Arrangement, Con

struction, 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, 18s.

A Practical Treatise on the Manufacture of Starch, Glucose, Starch-Sugar, and Dextrine, based on 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, 185.

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, 7s. 6d.

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, 37. 125.

CONTENTS:

Machinery for Prospecting, Excavating, Hauling, and Hoisting-Ventilation-PumpingTreatment 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, 25. 6d.

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, 185.

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, 9s.

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, 5s.

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,

10s. 6d.

Surcharged and different Forms of Retaining Walls.

By J. S. TATE. Illustrated, 8vo, sewed, 2s.

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, 35.

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, 5s.

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

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, 17. 10s.

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, 25.

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, Is., or sewed, 6d.

A Treatise on a Practical Method of Designing SlideValve 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, 6s.

Cleaning and Scouring: a Manual for Dyers, Laun

dresses, and for Domestic Use. By S. CHRISTOPHER. 18mo, sewed, 6d.

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, Ss. 6d.

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, Svo, cloth, 12s. 6d.

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 Steamusing Public. By MAURICE JOHN SEXTON. Second Edition, royal 32mo, roan, gilt edges, 5s.

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, Svo, cloth, 12s. 6d.

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, 21. 25.; or cheaper edition, cloth, 25s.

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, Semiportable, 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, Connectingrods, 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 Svo, cloth, 6s.

Camus (M.) Treatise on the Teeth of Wheels, demon

strating 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, 5s.

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, 12s. 6d.

PRINCIPAL CONTENTS:

Part 1. Introduction and the Principles of Geometry. Part 2. Land Surveying; comprising General Observations-The Chain-Offsets Surveying by the Chain only-Surveying Hilly Ground-To Survey an Estate or Parish by the Chain only-Surveying with the Theodolite-Mining and Town Surveying-Railroad Surveying-Mapping-Division and Laying out of Land-Observations on Enclosures-Plane Trigonometry. Part 3. LevellingSimple and Compound Levelling-The Level Book-Parliamentary Plan and SectionLevelling with a Theodolite-Gradients-Wooden Curves-To Lay out a Railway CurveSetting out Widths. Part 4. Calculating Quantities generally for Estimates-Cuttings and Embankments-Tunnels-Brickwork-Ironwork-Timber Measuring. Part 5. Description and Use of Instruments in Surveying and Plotting-The Improved Dumpy Level-Troughton's Level The Prismatic Compass-Proportional Compass Box Sextant-Vernier - Pantagraph-Merrett's Improved Quadrant-Improved Computation Scale The Diagonal ScaleStraight Edge and Sector. Part 6. Logarithms of Numbers - Logarithmic Sines and Co-Sines, Tangents and Co-Tangents-Natural Sines and Co-Sines-Tables for Earthwork, for Setting out Curves, and for various Calculations, etc., etc., etc.

Saws: the History, Development, Action, Classifica

tion, and Comparison of Saws of all kinds. By ROBERT GRIMSHAW, With 220 illustrations, 4to, cloth, 12s. 6d.

A Supplement to the above; containing additional

practical matter, more especially relating to the forms of Saw Teeth for special material and conditions, and to the behaviour of Saws under particular conditions. With 120 illustrations, cloth, 9s.

A Guide for the Electric Testing of Telegraph Cables. By Capt. V. HOSKICER, Royal Danish Engineers. With illustrations, second edition, crown 8vo, cloth, 4s. 6d.

Laying and Repairing Electric Telegraph Cables. By Capt. V. HosKIER, Royal Danish Engineers. 35. 6d.

Crown 8vo, cloth,

A Pocket-Book of Practical Rules for the Proportions of Modern Engines and Boilers for Land and Marine purposes. By N. P. BURGH. Seventh edition, royal 32mo, roan, 4s. 6d.

Table of Logarithms of the Natural Numbers, from

I to 108,000. By CHARLES BABBAGE, Esq., M.A. Stereotyped edition, royal 8vo, cloth, 7s. 6d.

To ensure the correctness of these Tables of Logarithms, they were compared with Callett's, Vega's, Hutton's, Briggs', Gardiner's, and Taylor's Tables of Logarithms, and carefully read by nine different readers; and further, to remove any possibility of an error remaining, the stereotyped sheets were hung up in the Hall at Cambridge University, and a reward offered to anyone who could find an inaccuracy. So correct are these Tables, that since their first issue in 1827 no error has been discovered.