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 383
affect the final result. Theeffect is the same as if, after the fore-sight to the intermediate pointhad been taken, the instrument had been taken up and set downagain at precisely the same height as before, and a back-sight hadthen been taken to the same point. Hence, in this form, the•… … preceding one, but with only two settings of the instrument. D isthe turning-point: STATIONS. DISTANCES. BACK-SIGHTS. + FORE-SIGHTS. — RISE. FALL. TOTALHEIGHTS. ABCD EF 2-006-007-009-004-00 6-007-006-004-008-00 1-005-00 4-001-00 4-00 o-oo -4-00—5-00-4-G0+ 1-00-3-U0 + 28-00 —31-00 3 00 In leveling…
Surveying
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