A dictionary of electrical words, terms and phrases (1896)
Houston, Edwin J. (Edwin James), 1847-1914 · New York, The W.J. Johnston company · leaf 122
he formshown in Fig. 148. The coil of wire is formed ofan alloy of platinum and silver, insulated by silkcovering and melted paraffine. Its ends are sol-dered to thick copper rods, r, r, for ready con-nection with mercury cups. The coil is at B.The space above it, at A, is filled with paraffine.A… … Fig. 148. Standard time. Since the coil is heated by the current, suc-cessive observations should be at least ten minutesapart. Only mild currents should be passedthrough the coils. Coil, Resistance, Standardized Resistance coils whose resistances have beencarefully determined by comparison with…
Electricity · Electrical engineering
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