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 386
ified, connect the lamp to thewires any way and throw on the current. Allow the lamp to burn forabout five minutes, then cut off the current and it will be noted that ELECTRIC LIGHTING 2,477 one of the carbons will remain bright a little longer than the other.If the lamp be properly connected the… … Fig. 3,405.— Emergency water resistance for use with an arc light. Where a resistance unit ofthe ordinary rheostat type is not available, it is possible to manufacture for quick use aresistance unit which is composed of a barrel with a metal plate at the bottom, to which isattached a rubber covered…
Electrical engineering
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