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      Knowledge is Power

      Scientific American June 08, 1895

      The White Cliffs Opal Fields, New South Wales

      • By F. G. De V. Gipps on June 8, 1895

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      More in the June 08, 1895 issue of Scientific American
      • AN Archæological Discovery in Colombia
      • Forests Turned to Stone
      • Microbes and Metals
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