Davies, Charles, 1798-1876 · New York, Cincinnati [etc.] American book company · leaf 323
Fig. 166.—Sand and Shingle Beaches, Eroded Earth Banks, Roads, Fences, Shaded Road-sides, Hill-shading. … BOOK IX. RAILWAY CURVES. M 349. After the route of a railroad or canal has been deter-mined by reconyiaissance, the centre line of the work is estab-lished by a transit (see Section III, B. IV). 350. This preliminary survey establishes a succession ofstraight lines, of greater or less length,…
Surveying
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