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      Knowledge is Power

      Scientific American May 25, 1918

      The Maple Tree Helps to Relieve Sugar Shortage

      An Old-Time Industry Neglected of Late

      • May 25, 1918

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      More in the May 25, 1918 issue of Scientific American
      • Aeroplane Limits
      • Manufacture of Silica Bricks
      • Problems of Atomic Structure-III
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