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      Knowledge is Power

      Scientific American April 03, 1886

      On the Enrichment of Coal Gas by Certain Hydrocarbons

      • By George E. Davis on April 3, 1886

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      More in the April 03, 1886 issue of Scientific American
      • Spiel's Petroleum Engine
      • Timber: Its Growth, Seasoning, and Preparation for use
      • A New Theory of Sound
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