“ELECTRICAL Transmission” covers a somewhat wider field than indicated by the title, for the author has included also some notes on hydraulics, water and steam turbines, Diesel engines, boilers, working cost of prime movers, switch-boards, transformers, induction, synchronous and commutator motors, measuring instruments, and other matters pertaining to the use and sale of electricity after it has been transmitted. In treatment the book is thoroughly practical, although, as may be expected, American practice predominates. This is no drawback, since for high voltage long-distance transmission English readers cannot do better than study the details of the work done in America, but there are also some features in English and Continental practice which are worthy of study and should therefore not be omitted in a handbook on the subject. Thus the Merz-Price safety device, which has made the linking-up of the power-stations on the north-east coast possible, and is now also extensively used on the Continent, is not even mentioned, the subject of graded cables is dismissed with a few lines, there is no mention of Nagel' s condenser bushings, and the hexagonal arrangement of duplicated power lines, now almost universal in Switzerland, is also ignored. The Elements of Electrical Transmission. A Text-book for Colleges and Technical Schools. By Prof. O. J. Ferguson. Pp. vii + 457. (New York: The Macmillan Company; London: Macmillan and Co., Ltd., 1911.) Price 15s. net. Direct and Alternating Current Manual. With Directions for Testing, and a Discussion of the Theory of Electrical Apparatus. By Prof. F. Bedell. Assisted by Dr. Clarence A. Pierce. Second Edition, enlarged and revised. Pp. xiii + 360. (London: Constable and Co., Ltd., 1912.) Price 8s. net. Storage Batteries. The Chemistry and Physics of the Lead Accumulator. By Prof. H. W. Morse. Pp. v + 266. (New York: The Macmillan Company; London: Macmillan and Co., Ltd., 1912.) Price 6s. 6d. net. Maschinen und Apparate der Starkstromtechnik: ihre Wirkungsweise und Konstruktion. Erster Teil: “Gleichstrom”. Zweiter Teil: “Wechselstrom”. By Gustav W. Meyer. Pp. xiv + 590. (Leipzig and Berlin: B. G. Teubner, 1912.) Price 15 marks.