International Correspondence Schools · Scranton, Pa. : The Colliery engineer co. · leaf 241
vering as many of these points as pos-sible, and a pencil line drawn in place of the thread. Thispencil line will locate a tangent on the map. In the sameway any number of tangents may be located. A set of office curves will be of great assistance in fittingcurves to the tangents, the curves like… … FIG. 360. tangent distances accu-rately scaled from theintersection points. 1418. Field Notesfrom the Paper Lo-cation.—In taking notesfrom the paper locationfor actual field work, thepoints of curve and pointsof tangent should be care-fully referred to fixedpoints in the preliminaryline (either…
Railroad engineering
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