Kirkman, Marshall Monroe, 1842-1921 · New York, Chicago, The World Railway Publishing Company · leaf 347
above requirements, the expansion and contraction of the rails should be absolutely unhindered; otherwise, the rails will be bent while expanding, and the track, in extreme cases, be buckled or spread. Fourth. At the same time the rails must be held so firmly that, with good ties and ballast, the… … Bridge Guard, intended to prevent trains from being precipitated into the stream beneath or over the embankments on either side. is not as well suited as another form. In addi- tion to the foregoing there is also that very im- portant consideration, the ease of manipulation, as governing the…
Railroads · Transportation
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