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      Knowledge is Power

      Scientific American January 09, 1909

      Further Details of the Home-Made Vacuum Cleaner

      • By W. J. C. on January 9, 1909

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      More in the January 09, 1909 issue of Scientific American
      • A New Rifle-Propelled Grenade
      • Correspondence - January 9, 1909
      • Index of Inventions - January 9, 1909
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