_The Engineer._--"A rapid glance at the illustrations contained in this book is sufficient to show that it differs very materially from most others having the same title. Indeed, it may be said that the volume possesses that desirable but unusual feature--originality. A chapter on the magnetic field contains information which the student will find well worth acquiring, and the same applies to that section of the book which deals with conductors moving in a magnetic field. The alternating current section is also good, and in a number of places it possesses the merit of originality. The book, as we have already intimated, is written on practical lines, and it is a decided improvement on most books we have seen having for their title the word 'Electricity'." CONTINUOUS CURRENT ENGINEERING. By ALFRED HAY, D.Sc., M.I.E.E. About 330 pages. Fully Illustrated. Demy 8vo. 5_s._ net. A standard text-book for the practical student, giving a simple account of the component parts of a continuous current lighting and power plant, dynamos, motors, secondary cells, measuring instruments, etc. DIRECT AND ALTERNATING CURRENT TESTING. By FREDERICK BEDELL, Ph.D., Professor of Applied Electricity in Cornell University, and CLARENCE A. PIERCE, Ph.D. 8_s._ net. CONTENTS:--Direct Current Generators. Direct Current Motors. Synchronous Alternators. Single-Phase Currents. Transformers. Polyphase Currents. Phase Changers. Potential Regulators, etc. THE THEORY OF ELECTRIC CABLES AND NETWORKS. By ALEXANDER RUSSELL, M.A., D.Sc. Demy 8vo. 8_s._ net. _Mechanical Engineer._--" ... the work needs only to be known in order to be well appreciated by the electrical profession." LABORATORY AND FACTORY TESTS IN ELECTRICAL ENGINEERING. By GEORGE F. SEVER and FITZHUGH TOWNSEND, Second Edition. Thoroughly revised. Demy 8vo. 282 pages. 10_s._ 6_d._ net. This book represents the laboratory work required in the Electrical Engineering Course at Columbia University. It is intended to serve as a text-book for the use of students, but furthermore it may be found useful by those who are engaged in the electrical profession. RADIO-TELEGRAPHY. By C. C. F. MONCKTON, M.I.E.E. With 173 Diagrams and Illustrations. Extra Crown 8vo. 6_s._ net.