Cumming, Linnæus, b. 1843. [from old catalog] · New York, D. Van Nostrand · leaf 303
ch a current is transmitted. The softiron, while the current is passing, becomes a very strongmagnet, but instantly loses its magnetism when the circuit isbroken. This is easily seen by putting a stout soft iron wire 284 Electricity. [Book III. through a helix of insulated copper wire, when, on… … Fig. 182. If a horse-shoe is made in soft iron, and a few dozenstrands of wire are coiled in opposite directions round thetwo ends, on passing a current through the wire, a very-powerful electro-magnet is made, capable of supporting veryheavy weights when suspended from a soft iron armaturejoining…
Electricity
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![An illustration from Essai de physique, par Mr. Pierre van Musschenbroek ... avec une description de nouvelles sortes de machines pneumatiques, et un recueil d'expériences par Mr. J. v[an] M[usschenbroek] Traduit du hollandois par Mr. Pierre Massuet .. (1751)](https://img.insideoutlibrary.com/img/200/ia-essaidephysiquep02muss-226-50.webp)
