Davies, Charles, 1798-1876 · New York, Cincinnati [etc.] American book company · leaf 330
c-tion angle. BOOK IX.] RAILWAY CUEVES. 3^3 Location of Curves by two Transits. 357. The surface, over which it is necessary to locate a curve,may be of such a character as to render it impracticable for thechainmen to make their measurements; if, however, the variouspoints are accessible to the… … Fig. 170. Let A and B be the two tangent points of the curve AvB,and D the intersection of the tangents. If from any point v, on the curve, the lines vA, vB, be drawn,then the sum of the angles vAB and vBA is measured by one-half the arc AB, and is therefore equal to one-half the angle a,or to…
Surveying
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
