International Correspondence Schools · Scranton, Pa. : The Colliery engineer co. · leaf 171
C/ 3 ^ r 1 ci H O i c ■: ^ H »■: 5 C 5 i- a D Oi 1 W +- 760 MAPPING. A piece of drawing paper one-half the size of an ordinarydrawing plate will be large enough to contain plats of bothlines. The total latitudes and departures in both examplesare reckoned from Station 1, which in Fig. 333 is the… … Fig. 333. In Fig. 333, a magnetic meridian is drawn through Sta. 1,which we call A. We find in the column for total latitudesand departures from Sta. 1 (see Example 1), that the totallatitude of Sta. 2 is+ 375.9 links, which we scale off on themeridian above A to a scale of 2 chains or 200 links to…
Railroad engineering
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