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 456
the % in. axle. # At a cost of 7 cents for labor and material we frequently obtain froi3,000 to 4,000 additional life from a wheel, and in all cases we obtain the limit of wear.Other companies report wear from 2,800 miles in interurban service, to 25,000 or 30,00miles in city service. ELECTRIC…
Electrical engineering
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