The standard electrical dictionary; a popular dictionary of words, terms, and phrases, used in the practice of electrical engineering (1897)
Sloane, T. O'Conor (Thomas O'Conor), 1851-1940 · New York, H. W. Henley & co. · leaf 279
Fig. 188. Sir William Thomsons Ampere-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 ELECTRICAL DICTIONARY. 275 ing the magnetic needle, and…
Electricity
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