Abstract

IN this work an excellent attempt is made to present the elements of a very important subject in small compass and in a clear and readable form, without any sacrifice of accuracy. The present volume is only the first instalment of the complete treatise promised by the author, but it contains in nine chapters, covering some 280 pages, a fairly comprehensive survey of the elements of electromagnetism, the magnetic properties of iron, magnetic circuits and characteristic curves of dynamos, a discussion of efficiencies, and the action of multipolar dynamos. A Text-Book on Electromagnetism and the Construction of Dynamos. By Dugald C. Jackson, Professor of Electrical Engineering in the University of Wisconsin, &c. Vol. I. (New York and London: Macmillan and Co., 1893.)

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