A treatise on surveying ; in which the theory and practice are fully explained (1860)
Alsop, Samuel · Philadelphia, E. C. & J. Biddle & co. · leaf 182
DC : sin. BAC . sin. BCD :: AB BD. Having found BD, DC may be run towards C; or by theangle, if C be invisible from D. If C is visible from the point D, the latter may be foundby trial, thus:— Set the instrument at a station as near the proper posi-tion as possible, and deflect the given angle.… … 299. If the point and the line bothbe inaccessible. Take any convenientstation D, (Fig. 122,) and run DEparallel to AB, by Art. 302. Thenrun CFG, making the required anglewith ED, by Art. 298; or the dis-tance on the base DC (Fig. 125)may be calculated. Problem 4.— To run a line parallel to a given…
Surveying
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
