Electromagnetic problems in electrical engineering. An elementary treatise on the application of the principles of electromagnetism to the theory of the magnetic field and of the magnetic forces in electrical machinery and apparatus: By B. Hague, D.Sc. (Lond.), Ph.D. (Glas.), A. C. G. I., A. M. I. E. E., lecturer in electrical engineering in the University of Glasgow. xiv–359 pages, 8vo, cloth. New York, Oxford University Press, 1929. Price, $10.00