Davies, Charles, 1798-1876 · New York, Cincinnati [etc.] American book company · leaf 61
ny distancein the direction BD, Let a person at D align a staff on DA,while a second person at B aligns it on BB -. the staff will thusbe fixed at C. Then measure the distance BC. The two triangles BOD and CAB being similar, we have, BG : BD \: CB : BA, in which all the terms are known, except the… … nearly equal to ACE as practicable, and the angle BCD shouldnot exceed 45°. Secoxd Method.—Let B be the given point, and A theinaccessible object; it is required to find BA. Measure any horizontal base-line,as BC. Then, having placed stavesat B and C, measure any conre-nient distances BD and CE,…
Surveying
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
