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 96
he lineF P is the line required, being perpen-dicular to the given line at the point G. 118. Second Method. Let A and B betwo points of the given line. From Alet fall a perpendicular, A C, to the vis-ual line, B P; and from B let fall a per-pendicular, B D, to the visual line, A P.Find the point at… … 119. First Method. Fig. 95.
Surveying
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
