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      Knowledge is Power

      Scientific American July 03, 1915

      Necessity for Mine Operators to Know the Ash Values of their Coal

      • July 3, 1915

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      More in the July 03, 1915 issue of Scientific American
      • Italy and Engineering
      • Principles of Coal Sampling
      • Volatile Matter, Fixed Carbon and Sulphur in Coal
      View Full Contents
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