Electrical and scientific instruments and apparatus : november 20th, 1899 (1899)
Elmer G. Willyoung & Co · New York : E.G. Willyoung · leaf 162
urrent measurements, providedtwo observations are taken for each reading. The connections of theinstrument, both current and voltage, must in this case be reversedbetween the observations, and the mean of the two observations taken asthe current indication. A special wattmeter can be made on order… … 158 LAMP INSPECTORS WATTMETERS.
Electric apparatus and appliances · Equipment and supplies
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