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 37
* * * \ \ »• f / / / \ y / ,N ^ JJegrtetj^jlxis -€^s« :^:-~% ♦ ; • i \ \ V 4 • % » «. ». >-x JS --ft. >* y / Fig. 27.—Bar Magnet. ings to the paper. Paraffin paper can l>e prepared by dippingunglazed paper into a tray of melted paraffin. Bee Fig. 24.If the field is produced on sensitized… … Fig. 28.—Two Parallel Bar Magnets, Unlike Poles Adjacent. porarily at least, study each one in detail as it is made, andreproduce the same by a sketch at the time it is being made.
Electricity · Magnetism
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