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      Knowledge is Power

      Scientific American October 20, 1888

      The California Gray Whale

      (Rhacheanectes glaucus, Cope.)

      • By John Dean Caton on October 20, 1888

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      More in the October 20, 1888 issue of Scientific American
      • A Steam Water Wheel
      • How to make a Tennis Lawn
      • Notes on the Germicidal Action of Peroxide of Hydrogen
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