International Correspondence Schools · Scranton, Pa. : The Colliery engineer co. · leaf 252
point C . Solution.—Reducing 4 30 to decimal form and dividing by 6, the 4.5degree of the curve A B, we have -—- = .75 of a full station = 75 ft., which we must add to the curve A B, bringing the P. T. at B, and thetangent B A will pass through the point C. Ans. It will be evident that, had B X… … 1429. Problem VII.—To find the distance across ariver in a preliminary survey: Let the line A B, Fig. 368,cross a river, too wide fordirect measurement. With the instrument at A, sight A llllll Illll B to a flag held at B, and turnan angle ^y^ C= 1°. Setaplug at C, opposite B in the.line A C, and…
Railroad engineering
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