International Correspondence Schools · Scranton, Pa. : The Colliery engineer co. · leaf 400
-7r^j-:.Ci.^t:::!l;^^::i.: ^aig::.rfe^::-S3::Ki^^-i^ :Xr:it:;:::jKL;:Y.:,:f£.;:i^ rgc,^fe^U!:R: lL/k:^-p^l--K^.-,;ggp i^ry^jej,: 021 … Fig. 4C7 elevation by the curve r/, and in the plan by the curve ef.The arrangement of the stone in each course is shown in the 900 RAILROAD CONvSTRUCTTON. elevation A. It will be observed that in no instance is thebond less than 12 inches, and the proportion of headers(stones showing their short…
Railroad engineering
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