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 416
Ques. What standard is employed for measuring light ? Ans. The candle power. ELECTRIC LIGHTING 2,507 Ques. What is one candle power? Ans. The amount of light emitted by a sperm candle seven-eighths inch in diameter and burning 120 grains (7.776 grams)per hour. International Candle.—This is the… … Fig. 3,450.—Out rigger suspension for arc lamp. The suspension rope is protected from theweather when it passes over the pulley by being enclosed in the out rigger arm. Pentane Standard.—A standard of illumination employing a lampwith a specially constructed burner consuming a mixture of 7 parts…
Electrical engineering
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