Worthen, William Ezra, 1819-1897, [from old catalog] ed · New York, Appleton · leaf 121
d toshow the grade of cross-road, or changes of level at considerable distance fromthe line of rail, the same scales, vertical and horizontal, are adopted as in thelongitudinal section or profile. In Fig. 233 the upper or heavy line represents the line of the rail, thegrades being written above;… … FlG. 235. ferred to the line in plan, which becomes thus a representation both in planand elevation. Cross sections, for grades of cross-roads, etc., are usually plotted beneath orabove the profile or across the line when plan and profile are combined. Besides the complete plans, as above, giving…
Mechanical drawing
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