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      Scientific American February 19, 1870

      Correspondence - February 19, 1870

      The Editors are not responsible for the Opinions expressed by their Correspondents.

      • February 19, 1870

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      More in the February 19, 1870 issue of Scientific American
      • Answers to Correspondents- February 19, 1870
      • More about Niin
      • Penny's Improved Gang Sawmill
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