International Correspondence Schools · Scranton, Pa. : The Colliery engineer co. · leaf 47
(which will be more fully describedlater on) are the straight portions of a line of railroad. Theangle C E F, which the tangents make with each other, andthe distances B E and C E are required. Two points A andB of the tangent A B, and two points C and D of the tan-gent CD, being carefully located,… … Angle CEF\iQ\n<g exterior to the triangle E B C xs equal(see Art. 1194) to the sum oi E B C 2ind E CB =21° 45+21° 25= 43° 10. The angle B E C = 1^0° - C E F =130° 50. From the principle stated we have sin 136° 50 : sin21° 45 :: 304.2 ft. : side C E. Sin 21° 45= .37056; .37056 X 304.2 =…
Railroad engineering
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