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      Knowledge is Power

      Scientific American November 1921

      Grouping Our Power Plants

      The Superpower Survey's Impressive Figures, Which Afford Plenty of Food for Thought

      • By Robert G. Skerrett on November 1, 1921

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      More in the November 1921 issue of Scientific American
      • A Study in Offspring Herds
      • From Opium to Hash Eesh
      • Linotype Slugs and Catalogues
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