New library books

Electric machinery, 2d Edition, A. E. Fitzgerald, Charles Kingsley, Jr. McGraw-Hill Book Co., Inc., 330 W. 42 St., New York 36, N. Y., 1961; 568 pages, 6¼ by 9¼ inches, bound; $10.75. The first edition has been revised, and is now divided into three parts; the first part is devoted to the principles underlying energy storage in magnetic and electrostatic fields, linear magnetically coupled systems, electromechanical transducers, and rotating machines. The second and third parts present complementary treatments of rotating machinery. The second, based on dynamic coupled-circuit theory and dq variables, leads to the dynamic equations for machine performance. The third is concerned with the machine as a physical entity intended for a variety of engineering applications.