Practical applied electricity; a book in plain English, for the practical man. Theory, practical applications and examples (1911)
Moreton, David Penn, 1882- · Chicago, The Reilly & Britton co · leaf 286
itch-boards when used in ad-justing the field current ofmachines and the controlis accomplished by a smallhandle on the face of theboard, the rheostat beingusually mounted back ofthe board. 311. Ground Detectors.—A ground detector is an instru-ment used in measuring the insulation resistance… … Fig. 234
Electrical engineering
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