International Correspondence Schools · Scranton, Pa. : The Colliery engineer co. · leaf 460
ballasted, the material is takenfrom the shoulder of the roadway. If cinders, gravel, orbroken stone is to serve as ballast, construction trainsshould furnish the material as fast as it is needed. Ordinarily, earth is used on new lines, as the finances of TRACK WORK. 1041) the company seldom… … Fig. .504. the track in safe condition for the fulloperation of the construction train. The tools used in surfacing are thetrack jack, shovel, and tamping bar.The track jack, which takes the placeof the ancient track lever, is one of themost economical and indispensable ofthe trackmans tc^ols. One…
Railroad engineering
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