Abstract
A STUDENT having limited time for the study of the principles of direct current machinery will find this book useful as a general survey of the subject. The treatment is elementary but, so far as it goes, is satisfactory and well presented in the 318 pages and adequate illustrations.
Direct-Current Machinery
By Prof. Hempstead S. Bull. Pp. vi + 318. (NewYork: John Wiley and Sons, Inc.; London: Chapman and Hall, Ltd., 1939.) 15s. net.
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Direct-Current Machinery. Nature 146, 668 (1940). https://doi.org/10.1038/146668d0
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DOI: https://doi.org/10.1038/146668d0