Meadowcroft, Wm. H. (William Henry), b. 1853 · New York & London, Harper & brothers · leaf 34
it some fine copperwire, commencing onone leg of the horse-shoe and windingaround until we cameto the end of the otherleg. Then we should have two ends of wireleft, as shown in the sketch. (Fig. 3.) We connect these two ends with an electricbattery, giving, say, two volts, and then theamperes of… … Fig. 3 A-B-C OF ELECTRICITY say, it is shut off several times in making amagnet of this kind, and then the wire is takenaway from the battery and is unwound fromthe steel horseshoe, leaving it free from wire,just as you have seen it. This horseshoe isnow a permanent magnet—that is, it willalways…
Electricity
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