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      Knowledge is Power

      Scientific American June 25, 1921

      How the Lower Animals See

      Old and New Ideas on the Function and Operating Details of Insect Eyes

      • By William Crowder on June 25, 1921

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      More in the June 25, 1921 issue of Scientific American
      • Compromise, with a Big Stick, Shipping Troubles and more
      • Inventions New and Interesting
      • Concerning Ice
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