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      Digital & 4-Year Archive

      Scientific American September 06, 1890

      Recently Patented Inventions- September 6, 1890

      • September 6, 1890

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      More in the September 06, 1890 issue of Scientific American
      • An Improved Bob Sled
      • An Improved Wrench
      • Indianapolis Meeting of the American Association for the Advancement of Science
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