Davies, Charles, 1798-1876 · New York, Cincinnati [etc.] American book company · leaf 368
preceding one, to coincidewith it, and so on till all are brought into coincidence withthe fixed one. The lines of the traverse will then be situatedin one plane, and a plot of them, in this position, will be theprofile required. The distances from the traverse to the floorand roof of the tunnel,… … Fig. 188. If the course of the tunnel is not a straight line it must betraversed. Assuming it to be a straight line, the bearing isobtained with the transit. The length of the tunnel is thenaccurately measured with a steel tape or a rod. The surveyorDOW stakes out the course on the surface, then…
Surveying
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
