Dynamo-electricity: its generation, application, transmission, storage and measurement (1884)
Prescott, George B. (George Bartlett), 1830-1894 · New York, D. Appleton · leaf 846
ending from either side of the block carry brushes, C, whichrun over the contact surfaces, and a binding post, P, is set inthe block. Along the upper surface of the metal guide is ascale, shown in plan in fig. 628, by means of which the resist-ances corresponding to different positions of the block… … ±\y. 526. 830 ELECTRICAL MEASUREMENT.
Electrical engineering
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