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      Digital & 4-Year Archive

      Scientific American March 12, 1904

      The Depthometer: A Device for Measuring the Depth of Liquids in Tanks, Etc.

      • March 12, 1904

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      More in the March 12, 1904 issue of Scientific American
      • Engineering Notes
      • Recent Studies of Radium and Radio-Activity
      • The Manufacture of Emery Wheels
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