A treatise on surveying, comprising the theory and the practice ; (1887)
Gillespie, W. M. (William Mitchell), 1816-1868, Staley, Cady, 1840- [from old catalog] ed · New York, D. Appleton and company · leaf 429
nt points to be de-termined are : 1. At the top andbottom of slopes. 2, At the changesof slopes in degree. 3. On the water-shed lines, and on the thalwegs. 4. On cols, or culminating points of passes. 629. Forms of Ground. It will be found, on the inspection of acontour-map (which shows ground much… … Fig. 447. Fig. 448.
Surveying
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