Kirkman, Marshall Monroe, 1842-1921 · New York, Chicago, The World Railway Publishing Company · leaf 100
96 BUILDING AND REPAIRING RAILWAYS. is loosened with a plow, and drag or wheel scrapers are used to haul it to place. (See Figs 27,28,29, 30, 31, 32, 33, 34.)* GRADERS' PLOW. … Fig. 28. DRAG SCRAPER. *There is being introduced for this class of work machines known as "elevator graders and ditchers." These machines are drawn by six or more horses, and in suitable earth excavate the material in the borrowpit, elevate it and dump it in the embank- ment or into wagons (see…
Railroads · Transportation
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