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      Scientific American May 25, 1912

      The Reality of Molecules

      How an Abstract Conception of the Ancients Has Become a Concrete Fact

      • By Alfred Gradenwitz on May 25, 1912

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      More in the May 25, 1912 issue of Scientific American
      • Modern Hydraulic Turbine Practice
      • Steel and its Heat Treatment
      • Natural Gas
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