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      Memorial Day Sale

      Scientific American December 14, 1912

      Solving the Pier Problem, An Admirable Civic Body and more

      • December 14, 1912

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      More in the December 14, 1912 issue of Scientific American
      • An Apparatus for Making Observations from Aeroplanes
      • An Automatic Gasoline Engine Cream Separator
      • The Parcels Post Zone System
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