Dynamo-electricity: its generation, application, transmission, storage and measurement (1884)
Prescott, George B. (George Bartlett), 1830-1894 · New York, D. Appleton · leaf 336
Fig. 174. Fig. 175. Fig. 176. only two carbons in the apparatus. Two pencils, thinned downat one end, are placed in the same plane, and almost parallel; 316 THE ELECTRIC LIGHT. Fig. 177. the points are facing each other and thepencils are brought together to touch atone point. The points being…
Electrical engineering
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