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 492
At A set off a perpendicular, A C, by Art. 706. Then set theindex at 45°, and walk backward from A in the line of C A pro- Fig. 522. B ^^^^ ^^ >-7 / D D A longed, looking by direct vision at 0, until you arrive at some point,D, from which B is seen by reflection to coincide with C. Then isAD =… … the index be set at 71° 34, then the measured distance will be J AB, and so on. If the index be set at the complements of the above angles, the 478 MARITIME OR HYDRO GRAPHICAL SURVEYING. distance measured will be, in the first case, twice, and in the sec-ond case three times the desired one. When…
Surveying
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
