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      Scientific American August 1953

      The Amateur Scientist

      On the popular diversion of free diving, and a well-built Cassegrainian telescope

      • By Albert G. Ingalls on August 1, 1953

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      More in the August 1953 issue of Scientific American
      • 50 and 100 Years Ago: August 1953
      • Francis Hauksbee
      • The Genetics of the Dunkers
      View Full Contents
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