The Theory and Practice of Model Aeroplaning Part 30

3 6

=Elements of Gas Engine Design.= By S.A. MOSS. 197 pp. 18mo, boards.

(_New York, 1907_)

_net_ 2 0

=Gas and Petroleum Engines.= A Manual for Students and Engineers.

(FINSBURY TECHNICAL MANUAL.) By Prof. W. ROBINSON. _Third edition in preparation_

GAS LIGHTING.

=Gas a.n.a.lyst's Manual= (incorporating Hartley's "Gas a.n.a.lyst's Manual"

and "Gas Measurement"). By J. ABADY. 102 ill.u.s.trations, 576 pp. demy 8vo. (_1902_)

_net_ 18 0

=Gas Works:= their Arrangement, Construction, Plant and Machinery. By F. COLYER. 31 folding plates, 134 pp. 8vo. (_1884_)

_net_ 8 6

=Transactions of the Inst.i.tution of Gas Engineers.= Edited by WALTER T. DUNN, _Secretary_. Published annually. 8vo

_net_ 10 6

=Lighting by Acetylene.= By F. DYE. 75 illus. 200 pp. crown 8vo.

(_1902_)

_net_ 6 0

=A Comparison of the English and French Methods of Ascertaining the Illuminating Power of Coal Gas.= By A.J. VAN EIJNDHOVEN. Ill.u.s.trated, crown 8vo. (_1897_)

4 0

=Gas Lighting and Gas Fitting.= By W.P. GERHARD. Second edition, 190 pp. 18mo, boards. (_New York, 1894_)

_net_ 2 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_)

_net_ 6 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. 8vo

5 0

=Life as an Engineer:= its Lights, Shades, and Prospects. By J.W.C.

HALDANE. 23 plates, 338 pp. crown 8vo. (_1905_)

_net_ 5 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.

Ill.u.s.trated, 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_)

_net_ 5 0

=The Springing and Adjusting of Watches.= By F.J. BRITTEN. 75 illus.

152 pp. crown 8vo. (_1898_)

_net_ 3 0

=Prize Essay on the Balance Spring= and its Isochronal Adjustments. By M. IMMISCH. 7 illus. 50 pp. crown 8vo. (_1872_)

2 6