ELECTRIC TRANSMISSION OF ENERGY, and its Transformation, Subdivision, and Distribution. A Practical Handbook by Gisbert Kapp, C.E., Associate Member of the Institution of Civil Engineers, &c. With 119 Illustrations. Crown 8vo, pp. xi-331, 7s. 6d. cloth.

∵ It has been the aim of the author to present the scientific part of the subject in as simple a form as possible, giving descriptions of work actually carried out. He has endeavoured in this way to place before the reader an unbiassed report on the present state of electric transmission of energy.

“This is ‘a practical handbook’ par excellence—a book which will be read, studied, and used not by electricians merely, but by most engineers. It contains a vast amount of original matter, and it bears the signs of much patient thought assisted by practical experience.—

“We cannot speak too highly of this admirable book, and we trust future editions will follow in rapid succession.”—Electrical Review.

“A valuable work; written with regard to facts only.”—Electrician.

Gas Motors.

GAS ENGINES. Their Theory and Management. By William Macgregor. With 7 Plates. Crown 8vo, pp. 245, 8s. 6d. cloth.

List of Contents.

Introductory—Direct Working Engines without Compression—Gas Engines working with Compression—Compression Engines with Compressing Pump—Theory of the Gas Engine—Relative Speed of Combustion in Gaseous Explosive Mixtures—Witz’s Theoretical Cycles of Gas Engines—Some further Theoretical Data—Clerk’s Theory of the Gas Engine—The Gas Engine Indicator-Diagram—Index.

“Mr. Macgregor has collected a considerable amount of information on his subject of a kind which may prove valuable to many readers. All who desire to be well informed in gas engines will be able to get what they want from these pages.”—Engineering.