St. John, Thomas M. (Thomas Matthew), b. 1865 · New York, T. M. St. John · leaf 128
HEAT PRODUCED BY ELECTRIC CURRENT. 125 … Fig. 183. the art of eledlric welding is that of causing currents ofelecftricity to pass through the abutting ends of the piecesof metal which are to be welded,thereby generating heat at thepoint of contadl, which also be-comes the point of greatest re-sistance, while at the same timemechanical…
Electricity
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