Manual for railroad engineers and engineering students : containing the rules and tables needed for the location, construction, and equipment of railroads as built in the United States (1883)
Vose, George L. (George Leonard), 1831-1910 · Boston : Lee and Shepard · leaf 45
Fig. 9. Fig. 10. SURVEY. 21 The above figures contain the elements of the whole of topo-graphical drawing, as regards the tracing of contour lines. Inthe section of regular figures the horizontal projections of thosefigures are also regular ; but in a broken surface, like the ground,the lines…
Railroad engineering
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