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 419
2,510 HAWKINS ELECTRICITY Ques. What is a candle foot? Ans. The illumination produced by a light of one candle power at a distance of one foot. An intensity of one candle foot is produced by the light from a stand-ard candle at 1 foot from it, in the same horizontal plane as the flame.At 2 feet… … CAN PIE POWER / Fig. 3,452.—A unit cone. Imagine a standard candle as shown in the figure and a sphere ofone foot radius with its center at the candle. One square foot of the surface of this sphereis contained inside of a unit cone, and such a unit cone contains one lumen of light flux.Therefore,…
Electrical engineering
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