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      Knowledge is Power

      Scientific American June 1889

      Composition and Selection of a Subject

      • By Tristram T. Ellis on June 1, 1889

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      More in the June 1889 issue of Scientific American
      • Some Industrial Applications of Oxygen
      • Patents- June 1, 1889
      • Detection of Adulterations in Volatile and Fixed Oils by means of Abbe's Refractometer
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