Elementary natural philosophy : designed for high schools and academies (1881)
Griffin, La Roy F. (La Roy Freese), 1844-1916 · Philadelphia : Sower, Potts & Co. · leaf 274
t ismade, and it will sustain a greatweight. But when the currentis interrupted, it at once losesFig. 326. its magnetism. Electro-magnets have been applied to numerous uses,such as separating iron from brass, lifting weights, andlately in separating bits of iron from wheat before it entersthe mills…
Physics
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