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      Scientific American June 11, 1881

      Apparatus for Squaring and Measuring the Lengths of the Axle-Cranks of Locomotives

      • June 11, 1881

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      More in the June 11, 1881 issue of Scientific American
      • An Extraordinary Dwarf
      • Coal Per Horse-Power per Hour
      • Lorenzen's Ammonia Apparatus
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