A treatise on levelling, topography, and higher surveying (1876)
Gillespie, W. M. (William Mitchell), 1816-1868, Staley, Cady, b. 1840, ed · New York, D. Appleton and company · leaf 53
intermediate point had been taken, the instrumenthad been taken up and set down again at precisely the sameheight as before, and a back-sight had then been taken to thesame point. Hence, in this form, the turning-points arethose stations which have different back-sights and fore-sights,while those… … Stations. Distances. B. S. + F. S. - Eise. Fall. To. Heights. A 0.00 B 2.00 6.00 4.00 — 4.00 C 6.00 7.00 1.00 — 5.00 D 7.00 6.00 1.00 — 4.00 E 9.00 4.00 5.00 + 1.00 P 4.00 8.00 4.00 — 3.00 + 28.00 — 31.00 3.00 THE PRACTICE. 35 In levelling for sections, the distances between thepoints levelled mnst…
Surveying
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