enuating effect assisted wire of 1 mm. (0.39 inch) diameter in a cable of the cable, regardless of its capacity, to any desired point, provided we are able correspondingly to in- was equal to an open unassisted wire of the same length but of twice the diameter. Havirfg obtained such crease the… … COILS. Imperial Postal Department, Fig. 1.—THE INDUCTION COIL BOX. ' 1903 SCIENTIFIC AMERICAN, INC.
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