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      Knowledge is Power

      Scientific American April 06, 1878

      Tomlinson's Self-Oiling Journal-Box—For Car Axles, Shafting, saw Mandrels, &c

      • April 6, 1878

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      More in the April 06, 1878 issue of Scientific American
      • Divisibility of Gold
      • Official Inspection and Test of the Great Tay Bridge
      • The American Chess Congress of 1871
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