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 377
Fig. 341.—Tooth-Core Armature BodyWith Formed Coils in Position. ascertainingdown or … Fig. 342.—-Drum Armature Showing the Methodof Winding a Coil. at what voltageconducts, insteadof insulates. Thespecimen to betested, as a piece ofpaper or fibre, maybe interposed be-tween two platesconnected to asource of high ARMATURES. 359 potential, which is capable of being regulated. The…
Electricity · Magnetism
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