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      Knowledge is Power

      Scientific American October 03, 1885

      A Chapter from Dr. Le Plongeon's New Book, “Monuments of Mayax”

      • October 3, 1885

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      More in the October 03, 1885 issue of Scientific American
      • A Cellular Structure in Cast Steel
      • Locomotive Power, N. Y. Elevated Railroad Trains
      • Photo-Micrographs on Gelatine Plates for Lantern Projection
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