Hobart, H. M. (Henry Metcalf), 1868-1946 ed · Philadelphia, J. B. Lippincott · leaf 266
crossing, looping, testing,and extending wires. Test-teFminals for Meteps. See Ter-minals, Test, for Meters. Bismuth-spiral Density Tester Tester, Bismuth-spiral Density, a flat spiral of bismuthwire with suitablesupport and ter-minals (see fig.).The resistance ofbismuth varieswhen placed… … measuring the gap-density of dynamos andmotors where space is limited. See Bismuth.Tester, Bond. See Bond Tester.Tester, Cell, for Accumulator, a low-reading voltmeter (see fig.) usually calibratedto read three volts on either side of zero andthus show the direction in which the currentfrom the…
Electrical engineering
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