A dictionary of electrical words, terms and phrases (1896)
Houston, Edwin J. (Edwin James), 1847-1914 · New York, The W.J. Johnston company · leaf 218
Fig. 232. Quadrant Elec-trometer. … Fig. 233. Quadrant Electrometer, Showing Suspended-Needle. The registration of this class of electrometer isobtained by means of photograpViy. The spot of
Electricity · Electrical engineering
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