Dodge, Mary Mapes, 1830-1905 · [New York : Scribner & Co.] · leaf 796
r of both fire and explosions in these in-dustries. Strong magnets are placed in the at-trition machines so that all the chaff must passin close proximity to them before it reaches thegrinding disks. These magnets are powerfulenough to draw out any bits of iron that may bemixed in the chaff.… … ELECTRO-MAGNET LIFTING A SKULL-CRACKERWEIGHING 13,000 POUNDS. moved from the magnets after a run of a fewhours of the machinery. The ever-increasing field of usefulness that theelectro-magnet is operating in to-day furnishes 560 NATURE AND SCIENCE FOR YOUNG FOLKS [Apr., abundant instances of the…
Children's literature
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