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 459
16P Hails spacep a. HOLES 5LAMTEP BOTH LATERALLY ANP L0N6ITUPINALLY … Figs. 3,509 to 3,512.—Construction details of New York Central Railroad inverted third rail.As shown, the rail is supported from above every eleven feet by iron brackets, which holdthe insulation blocks by special clamps. These blocks, which are in two pieces, are 6 X % in.,and are interchangeable.…
Electrical engineering
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