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      Scientific American April 25, 1914

      Blood Pigment and Chlorophyll

      Their Close Relation Points to a Common Origin of Animal and Plant Life

      • By O. Damm on April 25, 1914

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      More in the April 25, 1914 issue of Scientific American
      • Machine Tools and the Motor Car Industry
      • The Decline of the American Navy
      • Powdered Coal under Boilers
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