Cumming, Linnæus, b. 1843. [from old catalog] · New York, D. Van Nostrand · leaf 38
Fig. 18. in a single bar magnet. AB in Fig. 20, the line of force PF atP will be found by compounding forces in the directions APand PB, directed respectively from the north and towardsthe south poles. 13. Strength of Magnetic Field of a Single Pole,by Coulombs Balance.—We are now in a position to… … AGS J2Dj3 Fig. 20. by means of the Torsion Balance (Fig. 21). It consists essen-tially of three parts—(1.) A long thin magnetic needle, -4, 20 Electricity. [Book I, evenly magnetized and suspended, so as to swing in a hori-zontal plane by a fine silver wire, which is attached above to aTorsion…
Electricity
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