Describes experiments on Boston and Albany in Mass. and New York. An audible warning sounded in conjunction with visual indication given by three-position automatic semaphore. See also Ry. Elec. Engr., vol. 13, no. 3, Mar. 1922, pp. 97-98, 1 fig.


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    Title :

    The federal signal company's audible signal


    Additional title:

    Ry. Age


    Published in:

    Railway Age ; 72 , n 9


    Publication date :

    1922


    Size :

    2 pages


    Remarks:

    4 Figs.


    Type of media :

    Article (Journal)


    Type of material :

    Print


    Language :

    English




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