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“Coil some No. 12 copper wire throuh holes in a board, as shown, and pass a strong current through it. Sprinkle iron filling as before and note the effect. Such a coil of conducting wire, wound so as to afford a number of equal and parallel circular electric circuits arranged upon a common axis, is called a solenoid.” -Avery 1895


Elroy M. Avery School Physics (New York: Sheldon and Company, 1895) 467


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