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      Knowledge is Power

      Scientific American December 21, 1918

      The Functions of the “Sacral Brain” in Dinosaurs

      How did These Immense Animals Maintain their Size?

      • By Richard Swann Lull on December 21, 1918

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      More in the December 21, 1918 issue of Scientific American
      • Relative Efficiency of Motor-Fuels
      • The Structure of the Skeleton in Invertebrate Animals
      • Definition of Valency
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