International Correspondence Schools · Scranton, Pa. : The Colliery engineer co. · leaf 304
and neatly dressed witha pointing tool. The joints of the rubble masonry aresimply struck^ i. e., the trowel is pressed against the mortarand drawn the full length of the joint, forming a water-shed for each joint. The joints are struck as the stonesare laid, the same mortar being used at the faces… … Fig. 391. Fig. ■6di shown in Fig. 392, but it is less exposed to the weather, and,hence, is more enduring and a more certain protection tothe joints. Mortar intended for pointing must be usedimmediately after mixing, and the pointing tool repeatedlyrun over the joint or bead, under considerable…
Railroad engineering
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