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      Scientific American October 22, 1881

      On a Method of Obtaining and Measuring Very High Vacua with a Modified form of Sprengel-Pump

      • By Ogden N Rood

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      More in the October 22, 1881 issue of Scientific American
      • Chateau in the &Aelig;gean Sea
      • Kind Treatment of Horses
      • On the Relations of Minute Organisms to Certain Specific Diseases
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