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(CYANOTYPES.) Efficiency and Current Harmonics of the Induction Motor.
(CYANOTYPES.) Efficiency and Current Harmonics of the Induction Motor. By S. Ferguson and H. A. Perkins. With 4 cyanotypes of electrical machinery, each measuring 6 1/4x8 1/4 inches (15.9x21 cm.), and many charts and graphs relating to the subject. 4to, gilt-stamped 1/2 morocco, edges and spine worn and rubbed; endpapers lightly age darkened (photographs bright and clean). Np, Nd
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May 26, 2005 10:30 AM EDT
New York, NY, US
Swann Auction Galleries
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