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      Scientific American December 16, 1876

      Improvement in Subaqueous Tunnels

      • By John C. Trautwine on December 16, 1876

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      More in the December 16, 1876 issue of Scientific American
      • Action of Lactic Acid on the Bones
      • Deterioration of Linen Goods
      • Extraction of Potash from Wool in the Grease
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