International Correspondence Schools · Scranton, Pa. : The Colliery engineer co. · leaf 364
ng cars. On a levelwith the top of the bench, and directly over the cars, a scaf-fold E is erected, and upon it a runway of planks F is laid, RAILROAD CONSTRUCTION. 953 extending from the scaffold to the heading. The headingmuck is loaded into barrows and wheeled on this runway tothe scaffold, and… … Fig. 448. the other, and provided with clamps by means of whichthey are adjusted to any desired length. The plank is laiddirectly upon these pipe supports. The air for working thedrills is carried from the air pipe G to the bench by meansof the bench hose //. The manifold K attached to the endof…
Railroad engineering
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