ut with a view to helping to mitigate the inconveniences,which must ever attend a change so vast as that introduced by the Railway-System. So it always is; one improvement pushes aside the improvementwhich just before had superseded its predecessor : canals must now partiallvyield to railways; and… … The improvement specified, consists of a frame with a groove about halfway up, in which are fitted two nuts or collars working up and down in thegroove ; in these collars the axles of the ground wheels revolve. The axlesof the ground wheels, and of the large friction wheels, are fixed, and…
Civil engineering · Architecture
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