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      Scientific American October 31, 1908

      Operation of Coal-Cutting Machinery

      Use and Economy of the Various Types of Coal Cutters

      • By George E. Lynch on October 31, 1908

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      More in the October 31, 1908 issue of Scientific American
      • Apparatus for Measuring the Heat of the Sun
      • High-Frequency Oscillations
      • Our Loss by Fire
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