A dictionary of electrical words, terms and phrases (1898)
Houston, Edwin J. (Edwin James), 1847-1914 · New York, The W. J. Johnston company · leaf 495
OP.O … Fig, 512. Apparatus for Three-Branched Sparks.were of few turns. The circuit connections wereas shown in Figs. 512 and 513, and the apparatusis described by Thomson as follows: A double coil was made, Fig. 512, in whichthe inner turns were about twelve and the outerturns twenty. These were kept…
Electricity · Electrical engineering
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