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      Scientific American April 15, 1876

      Index of Inventions - April 15, 1876

      Letters Patent of the united States were Granted in the Week Ending

      • April 15, 1876

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      More in the April 15, 1876 issue of Scientific American
      • Acalypha Marginata
      • Fluosilicic Acid in the Arts
      • New Woodworking and House and Carriage Building Inventions - April 15, 1876
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