Lessons in practical electricity; principles, experiments, and arithmetical problems, an elementary text-book (1902)
Swoope, Coates Walton. [from old catalog] · New York, D. Van Nostrand company · leaf 298
re ofequal strength the wire would not rotate. Another device to produce continuous rotation is illus-trated in Fig. 244, and called Barlows wheel. The edgeof a pivoted copper disc dips into a trough of mercury locatedbetween the poles of a horseshoe magnet. The magnets fieldacts at right angles to… … 280 PRACTICAL ELECTRICITY. 268. Electrodynamics.—The term electrodynamics is ap-plied to the stud}^ of that part of electricity Avhich treats ofthe force exerted by one current upon another. We havejust noted the reciprocal action between a current and a mag-net, and now in electrodynamics, the…
Electricity · Magnetism
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