Plane trigonometry, and its application to mensuration and land surveying. Accompanied with all the necessary logarithmic and trigonometric tables (1852)
Perkins, George R. (George Roberts), 1812-1876 · New York, D. Appleton · leaf 133
of someintervening obstruction. As an example, suppose inrunning the line AL, S. 37°E., we come to the edge of aswamp at B. We make ourway around the swamp bythe most easy route, notingthe bearing and distance ateach change of direction, un-til we reach a point H, whichwe judge to be nearly on… … 82.] SURVEYING. 123 Nos. Bearings. 1Dists. | N„ s. E. W. 1 BC. N. 75^° E. 10-33 : 2-63 999 2 CD, S. 40±° E. 6-40 4-86 4-16 1 3 I DF, S. 72i° E. 483 1 j T47 4-60 4 | FG, S. 15|° W. 11-26 1084 306 5 j GH,S. 8o£° W. 24fi 0-41 242 6 ! HB, (N. 41|° W.) i (19-99) 1 (,14-95) i1 (13-27) 10+log. 13-27 =…
Plane trigonometry · Surveying
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