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 42
external magnetism. An enlarged view of this ar-rangement of the particles is shown in Fig. 37. 27. Experimental Proof of the Molecular Theory ofMagnetism.—Fill a small glass test-tube with coarse steelfilings, and insert a cork in the mouth of the tube. Test eachend separately for magnetism by… … Fig. 35.—Glass Tube of Steel Filings Before Magnetisation, to magnetise it by any of the methods previously given.Test again with the needle; one end repels one of the needlespoles and attracts the other pole. Always make o repulsiontest to prove that a hod/ is magnet. Now shake the tubethoroughly…
Electricity · Magnetism
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