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 424
s of measuring the intensity of light, The instrument by which the candle power is determined is catlecja photometer. ELECTRIC LIGHTING 2,515 Ques. What is an integrating photometer? Ans. A photometer which gives directly, by one reading,the average light emitted around a meridian line. If the… … IG. 3,458.—Light curves s,howing the distribution of light from various sources. Of theseveral curves W represents the Welsbach light, O the Osium lamp, N the Nernst lamp,A the electric arc, I the electric incandescent carbon filament lamp, F the electric flamingarc, and G the inverted incandescent…
Electrical engineering
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