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      Memorial Day Sale

      Scientific American March 30, 1912

      Microphotoǵraphy in the Service of Applied Science

      By Our Paris Correspondent

      • March 30, 1912

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      More in the March 30, 1912 issue of Scientific American
      • A Concrete Bridǵe of Strikinǵ Desiǵn
      • Preventinǵ Disease-infection by Oysters
      • The Desiǵn of Model Propellers and Elastic Motors
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