Millikan, Robert Andrews, Gale, Henry Gordon · Boston : Ginn and Co. · leaf 287
I opments of electricity Joseph Henry (1797-1878) Born in Albany, Kew York ; taught 1 ihysics and mathematics in Albany m Academy and Princeton College.He invented the electromagnet(1828), discovered the oscillatory ™fi nature of the electric spark (1842)by magnetizing needles in the… … V AL IE I0 271
Physics
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