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 106
inary way, we must, before applying theabove rules, reverse one of the bearings. § 70. To plot a field which has been surveyed with a chainand compass. Suppose the bearings and dis-tances of the sides of a field to beas follows: ABBCCDDEEA N. 50t°«E.S. 41° E.S. 1\° E.S. 681-° W. H. 41° W. 5-08… … 96 SURVEYING. [chap. VHI. may bo 50}°, which is the bearing of the first side. Then bymeans of the scale of equal parts make AB equal to 5*08 ch.,which is the length of the first side. Through B, by means ofthe parallel rule, draw a line parallel to JSTS, which will be ameridian passing through the…
Plane trigonometry · Surveying
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