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 449
pended on to keep them there, or stops may be arranged to determine thelocation of the pieces. A charcoal fire should be used, but if bituminous coal be used, cokeenough of it to do the work, as the sulphur in the soft coal is to beavoided where good brazing is desired. SOLDERING AND BRAZING 3,103… … Fig. 4,472.—Air gas torch for brazing. <K:
Electrical engineering
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