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      Celebrate Math Awareness Month

      Scientific American July 12, 1879

      On the Elimination of Phosphorus in the Bessemer Converter

      • By Sidney G. Thomas, C. Gilchrist

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      More in the July 12, 1879 issue of Scientific American
      • A Valuable Insect
      • Classification of Mowers and Reapers
      • Improved Oscillating Engine
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