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      Knowledge is Power

      Scientific American December 03, 1887

      The Change of Gauge of Southern Railroads in 1886

      • By C. H. Hudson on December 3, 1887

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      More in the December 03, 1887 issue of Scientific American
      • Patents - December 3, 1887
      • Collodio-Chloride Positive Printing Paper
      • Long-Tailed Lady's Slippers
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