Dynamo-electricity: its generation, application, transmission, storage and measurement (1884)
Prescott, George B. (George Bartlett), 1830-1894 · New York, D. Appleton · leaf 422
enclosedin metallic cases, all of which, as well as the outer frame,are insulated from the circuit. Fig. 247 shows how the lamps THE BKUSH ARC lAMP. 40L are arranged upon masts for illuminating large areas. In allthese lamps, winch are designed for general illumination, thelower carbons are fixed,…
Electrical engineering
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