Lessons in practical electricity; principles, experiments, and arithmetical problems; over four hundred illustrations; an elementary text book (1909)
Swoope, C. Walton (Coates Walton), d. 1901 · New York, D. Van Nostrand company · leaf 325
e around the disc in theform of two semi-circles. In the left-hand one the directionis anti-clockwise, producing a N-face on the disc which re-pels the N-pole of the magnet, and tends to stop the motionproducing it. On the right-hand side a S-face is produced,attracting the N-pole, and again…
Electricity · Magnetism
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
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