The Steam Injector
A theoretical and practical treatise on the design and operation of injectors and on the flow of fluids through and the design of nozzles.

14 INVENTIONS, PATENTS, AND DESIGNS. With notes and the full text of the new British Patents and Designs Acts of 1907 and 1908. By Sir G. Croydon Marks, M.P. Crown 8vo. 128 pages. Second and Popular Edition (revised and enlarged), bound in flush cloth Is. net, postfree Is. 3d. net, abroacl ls. 6d. net. Infullcloth, gilt lettering, price 2s. net, postfree 2s.3d. net, abroad 2s. 6d. net. 47. . The au thor gives a short but clear summary of the nature of Letters Patent, and an outline of the sinipler legal points with which the inexperienced inventor shou’d be acquainted before applying for a patent. . . . The advan- tages of provisional protection are well brought out, and the ehapter on licensing inventions, which shows careful selection, is especially worth the attention of an intending lessor.”—The Times. “The information given throughout the book is most useful to persons unfamiliar with matters concerning patents.”—The Engineer. NOTES AND JUDGMENTS ON THE “WORKING” OF BRITISH PATENTS. By Sir G. Croydon Marks, M.P., A.M. Inst. C.E. These notes have been preparecl for the guidance of those interested in the “working” of British Patents, and have refer- ence mainly to Section 27 of the 1907 Act. Crown 8vo. Cloth. Price 2s. 6d. net, post free 2s. 9d. net, abroad 3s. net. B 48. RAM1E (RHEA) CHINA GRASS, THE NEW TEXTILE FIBRE. All about it. A book for Planters, Manufakturers, and Merchants. By Herbert A. Carter. This book is the outcome of a demand for a text-book on the new textile fibre, owing to the great increase which has arisen in the spinning and weaving of itin Europeand the United States. Large crown 8vo. 140 pages, with numerous Illustrations. Cloth, price 5s. net, post free 5s. 6d. net, abroad 5s. 9d. net. 48. “ ‘ Mr. Carter has succeeded in placing in concise form a great deal of information on this subject.”—Textile World Record. “ . . . forms a useful text-book. . , of considerable service.”—Bulletin of the Imperial Institute. FLY1NG MACHINES: PRACT1CE AND DESIGN, THE1R PRINCIPLES AND WORKING. By Rankin Kennedy, author of “Modern Engines and Power Generators,” <( Electrical Installa- tions,” “ Marine Propellers and Internal Combustion,” &c. &c. Acom- prehensive work, with over 60 Illustrations, popularly treated, but upon a st rietly scientific basis, with new formulæ, rules, measure- ments, and principles. Large 8vo. Cloth, price 5s. net, post free 5s. 6d. net, abroad 5s. 9d. net. 49. “ The author has given a general review of the flying machine problems. . . . the idea being to enable the designer to proceed in a methodical manner.”—Royal Automobile Club Journal. “ It is a genuine attempt to help the art forward.”— Castier’s Magazin°. “ A useful treatise. . , . the author going well into the subject of the design and working of aeroplanes.”— Mechanical World. OPEN1NQ BRIDGES. By Geo. Wilson, M.Sc. Price 2s. net, post free 2s. 3d. net, abroad 2s. 6d. net. 50. PRACTICAL GYROSCOPIC BALANC1NG. By Herbert Chatley, B.Sc. Eng. (Lond.), Author of “ How to Use Water Power,” “The Force of the Wind,” “The Problem of Flight.” Crown 8vo. Illustrated. Price 2s. net, post free 2s. 3d. net, abroad 2s. 6d. net. . 52.