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      Knowledge is Power

      Scientific American February 16, 1918

      The Hardening of Steel by Chromium and Copper

      • By L. Grenet on February 16, 1918

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      More in the February 16, 1918 issue of Scientific American
      • Imbibition Exhibited by some Shellac Derivatives
      • Restoration of Materials after Fires
      • Theories and Problems Relating to Musical Sands
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