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 423
rtained andrecorded if possible. 2,514 HAWKINS ELECTRICITY Ques. Define mean horizontal candle power. Ans. If, from a source of light there be drawn lines equallyin all directions in a plane, and their lengths be made propor-tional to the candle power in these directions then the sum of allthese… … FlG. 3,457.—Leeds and Northrop station photometer (120 between lights). The scp 1e is enginedivided on brass, white on black background—and in inverse squares—reading directlyin candle power. On one bench is the rotator, while the other carries the socket for thestandard incandescent lamp. Binding…
Electrical engineering
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