Worthen, William Ezra, 1819-1897, [from old catalog] ed · New York, Appleton · leaf 119
l edgeof the contours, and gave natural lines of watershed. This model was thenphotographed under an inclined light, and gave an admirable projection. Fig. 231 is a contoured map of Greenwood Cemetery and vicinity. Brook-lyn, N. Y. Fig. 232 is a map of the harbour and city of New Haven, reduced… … Fig. 232. TOPOGRAPHICAL DRAWING. 103 Railway Surveys are usually plotted by tangents. The curves are then putin, and the topographical features for the width necessary. The curves aredesignated by degrees, as a curve of 1°, 2°, 3°, etc.,according as the angle subtended at the centre by a100-feet…
Mechanical drawing
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