Appleton's dictionary of machines, mechanics, engine-work, and engineering (1869)
New York, Appleton · leaf 321
s, 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 M attracts all the north… … Small needles will become magnetized to saturation by one operation of this kind performed on eachof its surfaces; for larger bars, two or three, or more, repetitions are desirable. This method is veryeffectual, especially for single bars, and there is not, perhaps, any better for certain purposes,…
Mechanical engineering
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