Cumming, Linnæus, b. 1843. [from old catalog] · New York, D. Van Nostrand · leaf 289
e same as if we were to substitute forA a thin sheet of steel magnetized normally to its surfaceand having south polar magnetism on the side facing us, andnorth polar magnetism on the opposite side, and for B asimilar sheet, only with magnetisms reversed. If we have a series of such circuits… … Fig. 169. (Fig. 169), we shall have a series of magnetic shells magnetizednormally, all in the same direction, which will therefore beequivalent to a series of slices cut from a bar magnet, andshould behave collectively, just as a bar magnet. Such anarrangement is called a solenoid. Place on the…
Electricity
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