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      Knowledge is Power

      Scientific American July 29, 1911

      A Wire Ropeway for German East Africa

      Transportinǵ Lumber in a Junǵle

      • By Frederick C. Coleman on July 29, 1911

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      More in the July 29, 1911 issue of Scientific American
      • European use of Chemical Fertilizers
      • Practical Aspects of Printinǵ Teleǵraphy—I
      • The Gas Bladder of Bony Fishes
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