Although system of operating semaphore signals was invented to meet and defeat predatory habits of Chinese bandits, it should prove interesting and useful under variety of normal conditions which will readily suggest themselves to railway signal engineers; system is invention of J. H. Williams.


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    Title :

    A new method of operating semaphore signals


    Additional title:

    Engineer


    Published in:

    Engineer ; 144 , n 3755


    Publication date :

    1927


    Size :

    2 pages


    Remarks:

    5 Figs.


    Type of media :

    Article (Journal)


    Type of material :

    Print


    Language :

    English




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