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      Knowledge is Power

      Scientific American April 1929

      How People Differ Mentally

      A Large Part of the Commonest Beliefs About Our Individual Powers and Limitations Are Not True

      • By Donald A. Laird on April 1, 1929

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      More in the April 1929 issue of Scientific American
      • A Factory in the Wilderness
      • Boston's New "Madison Square Garden"
      • Exploring the Biblical Beth-shan
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