Electrical and scientific instruments and apparatus : november 20th, 1899 (1899)
Elmer G. Willyoung & Co · New York : E.G. Willyoung · leaf 77
Fig. 76. W4150 and W4452 … Fig. 77. W4454-4456. The Electro-Dynamometer is the only Standard Aiiinieter forAlternating- Currents, whether they be of large or small value.It contains no iron, and its indications depend only upon the torsion of itscontrol and the current being measured. 73 Tlie Law of flie…
Electric apparatus and appliances · Equipment and supplies
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