Appleton's dictionary of machines, mechanics, engine-work, and engineering : illustrated with four thousand engravings on wood ; in two volumes (1873)
D. Appleton and Company · New York : D. Appleton and Co. · leaf 319
t of which operation is, on the principles already ex-plained, that each half of the bar s n being acted on by opposite polarities, the two magnetic forces resi-dent in it become separated; the pole N of the bar M attracts all the south polarity and repels thenorth, whilst the pole S of the bar SI… … Small needles will become magnetized to saturation by one operation of this kind performed on eachof its surfaces ; for larger bars, two or tln-ee, or more, repetitious are desirable. This method is veryeffectual, especially for single bars, and there is not, perhaps, any better for certain…
Mechanical engineering · Mechanics · Engineering
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