International Correspondence Schools · Scranton, Pa. : The Colliery engineer co. · leaf 90
the eye. More distant objects which lie withoutthe possible range of location may be sketched in with theaid of the eye alone. 1298. Form of Topographers Notes.—A goodform for a topographers notes is shown in the accompany-ing diagram : Station. Lt. Line. Rt. Line. 0 8.4 10.0^45 ^ 30 -V -t^-- 1 ,… … 680 SURVEYING. They are a record of the cross-sections or slopes of a pre-liminary railroad survey, the line of which extends alongthe side of a steep hill. The slopes are taken with a Lockelevel and rod, giving the actual differences in elevation be-tween the points of change of slope. The…
Railroad engineering
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