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      Knowledge is Power

      Scientific American December 31, 1910

      A Substitute for a Telescope Driving Clock

      • By Frederic R. Honey on December 31, 1910

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      More in the December 31, 1910 issue of Scientific American
      • A Cheap Hydro-Comparator
      • Index- December 31, 1910
      • The Overestimated Antiseptic Power of Vinegar
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