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      Knowledge is Power

      Scientific American February 26, 1887

      The Frilled Shark--The Oldest Living Type of Vertebrates

      • February 26, 1887

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      More in the February 26, 1887 issue of Scientific American
      • Chevreul's Black
      • Engineering Inventions - February 26, 1887
      • Miscellaneous Inventions - February 26, 1887
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