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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 693
, electro-plating, 3,166,Roughing, wheel, electro-pl., 3,171, 3Round meter, ills., 1,798, $7.Rowland, multiplex telegraph, 2,249, $9. typewriting telegraph, 2,256, $9.Rubber, belts, 2,010, $8. covered, conductors, 725, 766, $4. insulation, advantage of, 725, $4. pump valves, flat disc, 2,999, $10.… … S coefficient value, 1,910-1,911, $8. Safety devices, elevator, ills., 2,899, 2,927, 2,929, $10.Safety Lighting Co., railway, car lighting, ills., 2,605, 2,607-2,610, $9.Sag (of), wire, 815, table, 816, $4.Sal-ammoniac, use of in cells, 42, $1.Salient pole, magnet, ills., 200-201, $1.Saline… Electrical engineering
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