Evolution from covered timber "arches" of 1836 to Bollman iron trusses and on to modern steel structures; Potomac River crossing of Baltimore and Ohio Railroad has made bridge history as well as reflected changes in railroad rolling stock and operating practices. (see also Eng. and Contracting, vol. 70, no. 5, May 1931, pp. 115-117, 3 figs)


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    Title :

    Ninety-four years of bridges at harpers ferry


    Additional title:

    Eng. News-Rec


    Contributors:

    Published in:

    Publication date :

    1931


    Size :

    3 pages


    Remarks:

    3 Figs.


    Type of media :

    Article (Journal)


    Type of material :

    Print


    Language :

    English