Hawkins electrical guide ... : questions, answers & illustrations : a progressive course of study for engineers, electricians, students and those desiring to acquire a working knowledge of electricity and its applications ; a practical treatise (1914)
Hawkins, N. (Nehemiah), 1833-1928 · New York : T. Audel & Co. · leaf 421
tts at the arc into current and voltage, withtjie two foe tors having the proper relation to give the best results. 2512 HAWKINS ELECTRICITY Ans. This unit, sometimes called the mean zonal candle power,is the mean of the candle power in all directions making a givenangle d with the equatorial plane… … Fig. 3,455.—Principle of Rumfords photometer A screen is equally illuminated by each of twosources of light whenever the two shadows cast by the same object are equally illuminated, thatis, have the same depth of shadow. In the diagram L and C are the two sources of light,L being a lamp, and C a…
Electrical engineering
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