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 467
NG 3,121 superheated liquid steel and superheated liquid slag (aluminumoxide) at a temperature of approximately 5,400° Fahr. From30 seconds to one minute is sufficient time to bring into reactionalmost any amount of thermit. The thermit steel when pouredinto a mould surrounding the ends of the… … Figs. 4,499 and 4,500.—-C and C electric arc welding apparatus. Fig. 4,499, operator withone type of head shield and combination electrode holder for both metallic and graphiteelectrodes. Fig. 4,500, graphite electrode holder and hand shield. before pouring the thermit steel, as otherwise they…
Electrical engineering
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