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      Knowledge is Power

      Scientific American August 19, 1905

      Precious Metals Recovered by Cyanide Processes

      • By Charles E. Munroe on August 19, 1905

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      More in the August 19, 1905 issue of Scientific American
      • Engineering Notes
      • The Construction of a Silvered Glass Telescope, Fifteen and a Half Inches in Aperture, and its use in Celestial Photography.—IV
      • Experiments with the Langley Aerodrome
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