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 109
/ CE If E C be made equal to A E, and D beset in the line of B E, and also in the per-pendicular from C, then will C D be equalto AB. If EC = iAE, then CD = *AB. 151. Otherwise: At A, in Fig. 120, measurea perpendicular, A C, to the line AB ; and atany point, as D in this line, set off a…
Surveying
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