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      Knowledge is Power

      Scientific American August 13, 1921

      Getting the Rest of the Oil

      Laboratory Tests that Reveal the Underground Secrets of the Petroleum Field

      • By Robert G. Skerrett on August 13, 1921

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      More in the August 13, 1921 issue of Scientific American
      • Proposed Hudson River Pontoon Bridge
      • An Ancient Art in Modern Dress
      • Railroading Under Roof
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