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      Scientific American May 18, 1918

      The Fool-Proof Precision Gage

      How the Results of Skilled Labor Are Made Available For Use by the Unskilled

      • May 18, 1918

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      More in the May 18, 1918 issue of Scientific American
      • Seeing but not Seen
      • The Port of Providence
      • Correspondence- May 18, 1918
      View Full Contents
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