The standard electrical dictionary : a popular encyclopaedia of words and terms used in the practice of electrical engineering (1898)
Sloane, T. O'Conor (Thomas O'Conor), 1851-1940 · London : Crosby Lockwood and Son · leaf 279
Fig. 188. Sir William Thomsons Ampkre-meter Galvanometer, down the groove. A number of short parallel needles mountedtogether, with an aluminum pointer are used. In the cut P is the base board, M is a glass covered case contain- STANDARD ELECTRICAIv DICTIONARY. 275 ing the magnetic needle, and…
Electricity
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