Appletons' cyclopaedia of applied mechanics: a dictionary of mechanical engineering and the mechanical arts (1880)
D. Appleton and Company, Benjamin, Park, 1849-1922 · New York, D. Appleton · leaf 397
the plates support but very small weights; but when combined with the iron end-pieces, the latterabsorb the magnetism, rendering the assemblage sufficiently powerful to carry twice or three timesits own weight. A very remarkable peculiarity of this magnet, which is not clearly explained, isthat…
Mechanical engineering -- Dictionaries
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