Electric transmission of energy and its transformation, subdivision, and distribution. A practical handbook (1894)
Kapp, Gisbert, 1852-1922 · New York, Van Nostrand · leaf 77
magnet N S was placed in such positionthat the lines of force joining its two poles passed trans-versely across the plane of rotation of the wheel, and uponsending a current through the wheel in the direction in-dicated by the arrows, rotation was produced in the oppo-site sense to the hands of a… … of the magnetic field being in this case horizontal wherethey cut through the wheel. Each spoke is a slidercoming successively into action as its extremity touchesthe mercury in the trough and is thus put in electricalconnection with the rest of the circuit. It was also foundthat the experiment…
Electric power production
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