A dictionary of electrical words, terms and phrases (1896)
Houston, Edwin J. (Edwin James), 1847-1914 · New York, The W.J. Johnston company · leaf 261
e attached both above and below, in line withthe centre of gravity of the needle. In this man-ner, the oscillations of the ship do not affect theneedle. Galvanometer, Mirror A galva-nometer in which, instead of reading the de-flections of the needle directly by its move- ments over a graduated… … Fig. 274. Mirror Galvanometer. A form of mirror galvanometer designed by SirWilliam Thomson is shown in Fig. 274. Theneedle is attached directly to the back of a light,silvered glass mirror, and consists of several smallmagnets made of pieces of a watch spring. Theneedle and mirror are suspended by…
Electricity · Electrical engineering
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