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      Digital & 4-Year Archive

      Scientific American August 09, 1913

      The Manufacture of Balls for Bearings

      Each Ball is Made True to Within One Ten-thousandth of an Inch

      • By Thomas J. Heller on August 9, 1913

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      More in the August 09, 1913 issue of Scientific American
      • Boronized Copper
      • On Safety of Life at Sea
      • The New International Carat of Two Hundred Milligrammes—I
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