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 38
^ a sketch at the time it is being made. MAGNETIC FIELDS. 19 … Fig. 29.—^Two Parallel Bar Magnets, Like Poles Adjacent. ^\ M ! f ■^ N.-> J ). I . . r s a>- z
Electricity · Magnetism
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
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