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      Knowledge is Power

      Scientific American July 29, 1893

      Colonel Auchmuty, Founder of the New York Trade Schools

      • July 29, 1893

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      More in the July 29, 1893 issue of Scientific American
      • An Improved Fence Post
      • Patents - July 29, 1893
      • Index of Inventions - July 29, 1893
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