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, Perspective, 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, Capt. R.E. Second edition, _with 21 plates_. 2 vols., cloth, 10_s._ 6_d._ _The Elements of Graphic Statics._ By Professor KARL VON OTT, translated from the German by G. S. CLARKE, Capt. 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, Capt. Royal Engineers. _With 112 illustrations_. 4to, cloth, 12_s._ 6_d._ _Dynamo-Electric Machinery_: A Manual for Students of Electro-technics. By SILVANUS P. THOMPSON, B.A., D.Sc., Professor of Experimental Physics in University College, Bristol, etc., etc. _Illustrated_, 8vo, 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-Ingénieur,’ 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._ _Tin_: Describing the Chief Methods of Mining, Dressing and Smelting it abroad; with Notes upon Arsenic, Bismuth and Wolfram. By ARTHUR G. CHARLETON, Mem. American Inst. of Mining Engineers. _With plates_, 8vo, cloth, 12_s._ 6_d._