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 38
Fig. 31.—Repulsion BetweenLike Poles. Fig. 32.—Magnetic Field of theXnd of a Bar Magnet. 20 PRACTICAL ELECTRICITY. Many other possible combinations of magnets to produce thesemagnetic figures will occur to the student. A thoroughknowledge of the direction of lines of force, as depicted by
Electricity · Magnetism
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
