. Pittsburgh and Allegheny in the centennial year . for moving the feeding tables, for turning over the ingotsand for moving the middle roll to vary the sizes of the grooves as required. Atelegraph ? leads to the hammer, and a steam crane piles up the ingots in theyard whenever it becomes inconvenient to take them direct to the re-heatingfurnaces for the rail train. A 23 inch 3 high train, with 3 .-^ets of rolls, is used for rolling rails. A line ofdriven If ails t,o the. saw carriage, and a second line of driven rollers leads.

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Keywords: ., bookcentury1800, bookdecade1870, bookidpittsburghal, bookyear1876