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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 394
as if itwere a peg, keeping the blade in the same horizontal position whilethe rod and instrument are taken over. 559. A Wall. First Method, Drive a peg at the bottom ofthe wall, on the first side, and observe on it. Measure the heightof the wall above the peg, and put this down as a B. S.… … wall, and this B. S. and F. S. had been really taken. Set up theinstrument beyond the wall, take a B. S. to this peg, and go on asusual. FORE-SIGHTS. STATIONS. HEIGHTS. BACK-SIGHTS. © 3-00 12-00 1-00 50Peg.Peg. 51 74-0076-0077-0078-00 5-00 13-00 2-00 79-0089-0079-00 25 380 LEVELING. Second Method.…Surveying
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