Millikan, Robert Andrews, Gale, Henry Gordon · Boston : Ginn and Co. · leaf 287
V AL IE I0 271 … Electromagnets This page shows in tlie upper right-liand corner a photograph of the first electro-magnet. It was constrncted at Princeton in 18_8 l)y Henry. He wound the armsof a U-shaped piece of iron with several layers of wire insulated by wrappingaround it strips of silk. Tho main illustration…
Physics
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