The Theory of the Gas Engine. By D. Clerk.Edited by F.E. Idell. Third edition, 19 illus.180 pp. 18mo, boards. (New York, 1903)net2 0
The Design and Construction of Oil Engines.By A.H. Goldingham. Third edition, 112illus. 260 pp. crown 8vo. (New York, 1910)net10 6
Gas Engine in Principle and Practice. By A.H.Goldingham. 107 illus. 195 pp. 8vo, cloth. (NewYork, 1907)net6 6
Practical Hand-Book on the Care and Managementof Gas Engines. By G. Lieckfeld.Third edition, square 16mo. (New York, 1896)3 6
Elements of Gas Engine Design. By S.A. Moss.197 pp. 18mo, boards. (New York, 1907)net2 0
Gas and Petroleum Engines. A Manual for Studentsand Engineers. (Finsbury TechnicalManual.) By Prof. W. Robinson. Third editionin preparation

GAS LIGHTING.

Gas Analyst's Manual (incorporating Hartley's "Gas Analyst's Manual" and "Gas Measurement"). By J. Abady. 102 illustrations, 576 pp. demy 8vo. (1902)net18 0
Gas Works: their Arrangement, Construction, Plant and Machinery. By F. Colyer. 31 folding plates, 134 pp. 8vo. (1884)net8 6
Transactions of the Institution of Gas Engineers. Edited by Walter T. Dunn, Secretary. Published annually. 8vonet10 6
Lighting by Acetylene. By F. Dye. 75 illus. 200 pp. crown 8vo. (1902)net6 0
A Comparison of the English and French Methods of Ascertaining the Illuminating Power of Coal Gas. By A.J. Van Eijndhoven. Illustrated, crown 8vo. (1897)4 0
Gas Lighting and Gas Fitting. By W.P. Gerhard. Second edition, 190 pp. 18mo, boards. (New York, 1894)net2 0
A Treatise on the Comparative Commercial Values of Gas Coals and Cannels. By D.A. Graham. 3 plates, 100 pp. 8vo. (1882)4 6
The Gas Engineer's Laboratory Handbook. By J. Hornby. Third edition, revised, 70 illus. 330 pp. crown 8vo. (1910)net6 0

HISTORICAL AND BIOGRAPHICAL.

Extracts from the Private Letters of the late Sir William Fothergill Cooke, 1836-9, relating to the Invention and Development of the Electric Telegraph; also a Memoir by Latimer Clark. Edited by F.H. Webb. Sec. Inst.E.E. 8vo. (1895)3 0
A Chronology of Inland Navigation in Great Britain. By H.R. De Salis. Crown 8vo. (1897).4 6
A History of Electric Telegraphy to the year 1837. By J.J. Fahie. 35 illus. 542 pp. crown 8vo. (1889)2 0
History and Development of Steam Locomotion on Common Roads. By W. Fletcher. 109 illus. 288 pp. 8vo5 0
Life as an Engineer: its Lights, Shades, and Prospects. By J.W.C. Haldane. 23 plates, 338 pp. crown 8vo. (1905)net5 0
Philipp Reis, Inventor of the Telephone: a Biographical Sketch. By Prof. S.P. Thompson. 8vo, cloth. (1883)7 6
The Development of the Mercurial Air Pump. By Prof. S.P. Thompson. Illustrated, royal 8vo, sewed. (1888)1 6

HOROLOGY.

Watch and Clock Maker's Handbook, Dictionary and Guide. By F.J. Britten. Tenth edition, 450 illus. 492 pp. crown 8vo. (1902)net5 0
The Springing and Adjusting of Watches. By F.J. Britten. 75 illus. 152 pp. crown 8vo. (1898)net3 0
Prize Essay on the Balance Spring and its Isochronal Adjustments. By M. Immisch. 7 illus. 50 pp. crown 8vo. (1872)2 6

HYDRAULICS AND HYDRAULIC
MACHINERY.

(See also Water Supply.)

Pumps: Historically, Theoretically and PracticallyConsidered. By P.R. Björling. Second edition,156 illus. 234 pp. crown 8vo. (1895)7 6
Pump Details. By P.R. Björling. 278 illus.211 pp. crown 8vo. (1892)7 6
Pumps and Pump Motors: A Manual for the useof Hydraulic Engineers. By P.R. Björling.Two vols. 261 plates, 369 pp. royal 4to. (1895).net1 10 0
Practical Handbook on Pump Construction.By P.R. Björling. Second edition, 9 plates,90 pp. crown 8vo. (1904)5 0
Water or Hydraulic Motors. By P.R. Björling.206 illus. 287 pp. crown 8vo. (1903)9 0
Hydraulic Machinery, with an Introduction toHydraulics. By R.G. Blaine. Second editionwith 307 illus. 468 pp. 8vo. (Finsbury TechnicalManual). (1905)net14 0
Practical Hydraulics. By T. Box. Fifteenthedition, 8 plates, 88 pp. crown 8vo. (1909)net5 0
Hydraulic, Steam, and Hand Power Lifting andPressing Machinery. By F. Colyer. Secondedition, 88 plates, 211 pp. imperial 8vo. (1892)net10 6
Pumps and Pumping Machinery. By F. Colyer.
Vol. I. Second edition, 53 plates, 212 pp. 8vo(1892)net10 6
Vol. II. Second edition, 48 plates, 169 pp. 8vo.(1900)net10 6
Construction of Horizontal and Vertical Water-wheels.By W. Cullen. Second edition, small4to. (1871)5 0
Donaldson's Poncelet Turbine and Water PressureEngine and Pump. By W. Donaldson.4to. (1883)5 0
Principles of Construction and Efficiency ofWater-wheels. By W. Donaldson. 13 illus.94 pp. 8vo. (1876)5 0
Practical Hydrostatics and Hydrostatic Formulæ.By E.S. Gould. 27 illus. 114 pp. 18mo, boards.(New York, 1903)net2 0
Hydraulic and other Tables for purposes ofSewerage and Water Supply. By T. Hennell.Third edition, 70 pp. crown 8vo. (1908)net4 6
Hydraulic Tables for finding the Mean Velocity andDischarge in Open Channels. By T. Higham.Second edition, 90 pp. super-royal 8vo. (1898)7 6
Tables for Calculating the Discharge of Waterin Pipes for Water and Power Supplies. Indexedat side for ready reference. By A.E. Silk.63 pp. crown 8vo. (1899)5 0
Simple Hydraulic Formulæ. By T.W. Stone.9 plates, 98 pp. crown 8vo. (1881)4 0