A chance "eureka moment" by a Scottish physicist solved a problem that had plagued the transatlantic cable -- and made a lord out of the man who had the insight. One of the fundamental problems of ...
IN the variable width method of recording sound on film, a galvanometer is used in which a loop of metal ribbon, 0-005 in. broad and 0-0005 in. thick, is placed between the poles of a permanent magnet ...
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