. Railway mechanical engineer . of the gathering range dimensions is an inherentadvantage of the wing type of head. The spread of thewings ma\- be increased or decreased at will, with a corre-sponding change in the gathering range without affectinginterchange with previous heads. The freight head, havingIjut a single port, may be made to size and be given a gather-ing range best suited to freight operations, and yet inter-.

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Keywords: ., bookcentury1900, bookdecade1910, booksubjectrailroadengineering