FOURTH EDITION. Revised and Enlarged. Illustrated. 25s. A TEXT-BOOK ON GAS, OIL, AND AIR ENGINES. AND OTHER PRIME MOVERS. In Large Crown 8vo. Cloth. Illustrated. 4s. 6d. net. THE THERMO-DYNAMIC PRINCIPLES OF ENGINE DESIGN. By LIONEL M. HOBBS, Engr.-Lieut. R. Ñ., of the Royal Naval College, Greenwich. "Should prove of invaluable service."-Shipping World. FIFTH EDITION. Revised and Enlarged. Fully Illustrated. 10s. 6d. VALVES AND VALVE-GEARING. By CHARLES HURST. Part I.-Steam Engine Valves. Part II.-Gas Engine Valves and Gears. Part III.-Air Compressor Valves and Gearing. Part IV.-Pump Valves. INDEX. "As a practical treatise, the book stands without a rival."-Mechanical World. In Large 8vo. Cloth. Fully Illustrated. 15s. net. OIL MOTORS: THEIR DEVELOPMENT, CONSTRUCTION, AND MANAGEMENT. By G. LIECKFELD. (Sole Authorised English Edition.) In Large 8vo. Fully Illustrated. In Two Volumes, sold separately. SECOND EDITION. Cloth. Fully Illustrated. 21s, net. By LEONARD ARCHBUTT, F.I.C., F.C.S., and R. M. DEELEY, "All that is known on the subject. Deserves the careful attention of all Engineers."-Railway Official Gazette. In Large 8vo. Handsome Cloth. 16s. net. A HANDBOOK OF THE DETECTION, INVESTIGATION AND By DR VON SCHWARTZ. "A wealth of information on the chemistry of fire and kindred topics." - Fire and Water. LONDON: C. GRIFFIN & CO., LTD., EXETER ST., STRAND. BY C. ALFRED SMITH, B.Sc. (ENG.), A.M.I.MECH.E., A.M.I.E.E., ASST. PROFESSOR OF ENGINEERING, EAST LONDON COLLEGE EDITOR OF THE UNIVERSITY OF BIRMINGHAM ENGINEERING JOURNAL. CHARLES GRIFFIN & COMPANY, LIMITED, EXETER STREET, STRAND. 1909. 30356 JUN 16 1909 LAWP тр A SPECIAL Course of three lectures on Suction Gas Plants was recently given at the East London College. This course was attended by members of the Institution of Marine Engineers, the Association of Engineers-in-Charge, the Junior Institution of Engineers, and students of this and other Colleges. It is at the request of many of the engineers who attended the lectures that they are now published. A great amount of correspondence followed the delivery of the lectures, and the discussion which took place at the close of the third lecture was especially interesting. This correspondence was requested, as it was desired to know whether the subject had been treated in a fashion simple enough to be understood easily, and advanced enough to be of service to engineers in practical work. It was exceedingly kind of many of the correspondents to take such a great deal of trouble, and to make many clear suggestions which have been incorporated in this book. It would not have been possible to present these lectures in their present form but for the services of my friend Mr E. A. Allcutt, B.Sc., of the University of Birmingham. Owing to the pressure of other work, the lecturer could give only suggestions and notes concerning the treatment of the points raised in the correspondence. Mr Allcutt has dovetailed these inquiries and the lecturer's replies to them into the text of the lectures. The illustrations have been especially prepared from drawings supplied by various firms. Every endeavour has been made to |