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      Scientific American June 12, 1915

      Cobalt Steel

      A New Material for Accelerating Machine Tool Speeds and Output

      • June 12, 1915

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      More in the June 12, 1915 issue of Scientific American
      • Correspondence - June 12, 1915
      • Electrification of Water by Splashing and Spraying
      • New Books, Etc
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