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      Knowledge is Power

      Scientific American September 22, 1917

      Commercial Alloy Steels

      Historical and Practical Notes on Their Development and Use

      • By Edgar D. Rogers on September 22, 1917

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      More in the September 22, 1917 issue of Scientific American
      • Earth Pressures
      • New Fulminates and Azides
      • Some of the World's Most Notable Bridges
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