_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. 1. 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._