Modern electricity and magnetism, theoretically and practically considered (1885)
Avery, Elroy M[cKendree], 1844- [from old catalog] · New York and Chicago, Sheldon and company · leaf 122
by winding about it an insulated cop-per wire and discharging a Ley den jar through the wire.We have already seen that a bar of soft iron may be tem-porarily magnetized by the influence of the voltaic current.It may be further shown by the action of the bar andhelix. {a) This apparatus consists of… … Fig. I Strongly magnetized; when the circuit is broken, the bar instantly loses its magnetic power. The bar may be a straight piece of stout iron wire; the helix may be made by winding insulated coj^per wire upon a piece of glass tubing large enough to admit the wire and not quite as long as the…
Electricity · Magnetism
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