. The railroad engineer's practice . Sin. B AO = \/ sin. {y -\- a — P) sin. /3 sin. ^ ft sin. D A O = sin. B A O sin. aDOC ==W + DAO — B AO — r — a. When ^1 is near C, and the ciirve has been run too far around,the following simple solution of this problem is given by Mr. J, , in the Railroad Gazette for March 17, 1882: 15. Measure D E and E A; then tan. AO D = ED COS. CO A B^ AER sin. AOD EDDOC=COA — AOD. In practice, however, *4 E is generally very small in compari-son with E D, and it is then a sufficient approximation to turnthe transit when at D on A, and measure the angle -1 D E
. The railroad engineer's practice . Sin. B AO = \/ sin. {y -\- a — P) sin. /3 sin. ^ ft sin. D A O = sin. B A O sin. aDOC ==W + DAO — B AO — r — a. When ^1 is near C, and the ciirve has been run too far around,the following simple solution of this problem is given by Mr. J, , in the Railroad Gazette for March 17, 1882: 15. Measure D E and E A; then tan. AO D = ED COS. CO A B^ AER sin. AOD EDDOC=COA — AOD. In practice, however, *4 E is generally very small in compari-son with E D, and it is then a sufficient approximation to turnthe transit when at D on A, and measure the angle -1 D E, andmake DOC =■ ADE. Problem 10. To draw a tangent to two curves already When the curves are in opposite du-ections.
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Keywords: ., bo, bookcentury1800, bookdecade1880, bookidrailroadengineer00clee
