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      Scientific American December 1975

      The Amateur Scientist, December 1975

      Diverse topics, starting with how to supply-electric power to something that is turning

      • By C. L. Stong on December 1, 1975

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      More in the December 1975 issue of Scientific American
      • 50 and 100 Years Ago, December 1975
      • Books, December 1975
      • Mathematical Games, December 1975
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