Lessons in practical electricity; principles, experiments, and arithmetical problems, an elementary text-book (1903)
Swoope, Coates Walton. [from old catalog] · New York, D. Van Nostrand company · leaf 52
■ ^oMji3»AkAPoij jp p* ^ -v. N, V N \ Nw >>... „---*- *- … Fig. 47.—Needle Deflected Through Non-Magnetic Body. the iron plate by induction. The needle pro-duces a similar effect on the other side of the plate, and beingfree to move, deflects slightly, until its lines of force are pro-portionately accommodated between the earths magnetismand the magnetism…
Electricity · Magnetism
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