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~~ ~,~ <br />~~ <br />--- ~ <br />~ - <br />',- <br />~___~_ ~. <br />KEITH'S RAILROAD CURVE TABLES. <br />• Published by KEUFFEL & ESSER CO., New York. <br />Entered according to Act of Congress in the year 1883, <br />by W. Keuffel & H. Esser, in the office of the Librarian of Congress, <br />- in Washington, D. C. <br />Copyright, 1902, by Keuffel & Esser Co. <br />- HOW TO USE KEITH'S TABLES. <br />EXAMPLE. <br />_ Wanted a Curve with an Ext. of about 12 ft. Angle <br />of Intersection or I. P. =23° 20' to the R. at Station <br />542-b72. <br />Ext. in Tab. I V opposite 23° 20' =120.87 <br />120.8?=12=10.07. Say a 10° Curve. <br />Tan. in Tab. IV opp. 23° 20'=1183.1 <br />1183.1=10 =118.31. <br />Tab. V correction for A. 23° 20' for a 10° Cur. =0.16 <br />118.31 +0.16 =118.47 =corrected Tangent. <br />(If corrected Ext. is required find in same way) <br />Ang. 23° 20'=23.33°=10=2.3333=L. C. <br />2° 192'=def. for sta. 542 I. P.=sta. 542-{-72 <br />4° 492' _ " " -F50 Tan. = 1.18.47 <br />7° 192' _ 543 <br />° "- " -x-50 B. C.=sta. 541-{-53.53 <br />9 492 - <br />11° 40' _ " " " 543 ~- L. C. = 2.33.33 <br />86.86 E. C. =Sta. 543 ~-86.80 <br />100-53.53=46.47X3'(def. far 1 fr. of 10° Cur.)=139.41'= <br />2° 192"=def. for sta. 542. <br />Def. for 50 ft. =2° 30' for a 10° Curve. <br />Def. for 36.86 ft. =1° 502' fora 10° Curve. <br />(These tables are published in Field Books of <br />KEUFFEL CQC ESSER CO., New York, N. Y.) <br />_. I l-..._., <br />III <br />aal <br />i7 <br />is <br />75 <br />35 <br />)7 <br />i0 <br />;4 <br />ao <br />i7 <br />>.5 <br />15 <br />i6 <br />38 <br />l2 <br />37 <br />33 <br />it <br />zo <br />x> <br />32 <br />i5 <br />~o <br />35 <br />23 <br />11 <br />~l <br />93 <br />35 <br />79 <br />75 <br />71 <br />ss <br />ss <br />70 <br />72 <br />7s <br />B1 <br />86 <br />95 <br />04 <br />15 <br />27 <br />41 <br />55 <br />72 <br />89 <br />O8 <br />29 <br />51 <br />74 <br />99 <br />25 <br />' 53 <br />82 <br />12 <br />44 <br />77 <br />12 <br />48 <br />86 <br />