Solenoidal magnet

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“The polarity of the solenoidal magnet may be determined by holding it in the right hand so that the fingers point in the direction of the current; then the extended thumb will point toward the marked or north-seeking pole of the magnet.” — Avery, 1895


Elroy M. Avery School Physics (New York: Sheldon and Company, 1895) 468


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