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 100
iangles. The obstacles noticed in the lastarticle may also be overcome by means of three equilateral trian-gles formed by the chain. Fix one endof the chain, and also the end of thefirst link from its other end, at B; fixthe end of the 33d link at A; takehold of the 66th link and draw thechain… … 86 LAND-SUR VEYING. point, as D. Make another equilateral triangle, DEF, as be-fore, and thus fix the point F. Prolong DP to a length equalto that of AD, and thus fix a point, G. At G form a thirdequilateral triangle, GHK, and thus fix a point, K. Then willK G give the direction of A B prolonged.…
Surveying
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