International Correspondence Schools · Scranton, Pa. : The Colliery engineer co. · leaf 202
FIG. 351. MAPPING. ^ni distance from the shore Hne, a parallel line is drawn, and alittle further removed a second parallel, and so on, as inFig. 351. An abrupt and rocky shore is shown in Fig. 352. Theirregular dotted surfaces surrounded by shore lines represent … Fig. ■.}5-i. sand bars. The dotted outlines beyond the shore linesrepresent either shoals or sunken rocks.
Railroad engineering
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