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      Knowledge is Power

      Scientific American August 20, 1921

      Housework in the Laboratory

      What the Government Tests Have Revealed Regarding the Energy Expended by the Housewife in Her Daily Work

      • By S. R. Winters on August 20, 1921

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      More in the August 20, 1921 issue of Scientific American
      • Cement for Leather Driving Belts
      • Simplifying the Coupling of Trains, Sucking the Cargo Out of a Ship
      • Winning Foreign Film Markets
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