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 334
e are valuable qualities where ELECTRIC LIGHTING 2,425 the carbons are held by small clamps far from their active ends. Forcedcarbons are never copper plated, and they are particularly suitable forcored carbons. The highest grades of forced carbon very nearly re-semble lamp black. They will mark on… … PlG. 3,335.—Candle power distributing curve for arc lamp as given by Fort Wayne Electric Co. Proper Sizes of Carbon.—In order to cut a carbon to anydesired length, all that is necessary is to nick it all around at theproper point and then break like a glass tube. In enclosed arclamps and…
Electrical engineering
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