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 392
AUTO-TRANSFORMER STARTING RESISTANCE … , 3,411.—^Connections of Cooper-Hewitt alternating current mercury vapor lamp. Itstube is similar in all respects to that of the direct current lamp, with the exception thatthe upper end carries two positive electrodes and one small starting electrode, the latterbeing connected through the starting…
Electrical engineering
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