Dynamo-electricity: its generation, application, transmission, storage and measurement (1884)
Prescott, George B. (George Bartlett), 1830-1894 · New York, D. Appleton · leaf 230
number in the regulating apparatus. From the central station also, the condition of the current af-fecting the lamps can be controlled by means of a testing pho-tometer, which shows how much the intensity of the currentmust be diminished or increased to correspond to a given lumi-nous intensity.…
Electrical engineering
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