Condensed from a paper presented at Boston meeting of the Railway Signal Club. Discusses the possibilities of three position signals used with an automatic block system, and with interlocking. (1100 w.)


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    Title :

    Possibilities of three-position signalling


    Additional title:

    Eng News


    Contributors:
    Rhea, Frank (author)

    Published in:

    Publication date :

    1899


    Type of media :

    Article (Journal)


    Type of material :

    Print


    Language :

    English


    Keywords :


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