ON A SIMPLE PLAN OF EASING RAILWAY CURVES. 



97 



Table of offsets and distances of parallel tangents for curves from 5 to 20 

 chains radius, eased through a length of 2 chains, giving 8 offsets for 



each curve. 



B. 



Radius 

 of Curve. 



h. 



Distance of 



Parallel 



Tangent. 



'u 



O 



1 



2 



3 



Centre of 



7i 



Curve = - 



2 



4 



5 



6 



7 



Point of 

 Contact 



= r. 



8 



Tangent 

 Offset 

 = T. 



Chains. 



In. 



] 



[n. 



In. 



In. 



In. 



In. 



In. 



In. 



In. 



In. 



5 



26-6 







2 



1-6 



5-5 



13-3 



257 



44-6 



70-6 



105-4 



79-2 



6 



22-0 







17 



1-4 



4-6 



11-0 



21-5 



371 



589 



88-0 



66-0 



7 



18-8 







15 



1-18 



4-0 



9-4 



18-4 



31-8 



50-5 



75-4 



56-5 



8 



165 







13 



1-03 



35 



8-2 



16-1 



27-8 



44-2 



66-0 



49-5 



9 



146 







11 



•91 



31 



73 



143 



247 



39-2 



58-5 



43-9 



10 



13-3 







10 



•82 



2-8 



66 



12-9 



22-3 



35-4 



52-8 



39 6 



11 



12-0 







09 



•75 



2-5 



6-0 



11:7 



20-2 



32-2 



48-0 



35-9 



12 



110 







08 



•69 



2-3 



5-5 



107 



18-6 



29-5 



440 



33-0 



13 



io-i 







08 



•63 



21 



5-0 



9-9 



171 



27-2 



40-6 



30-5 



14 



9-4 







07 



•59 



2 



47 



9-2 



159 



25-2 



377 



28-3 



15 



8-8 







07 



•55 



1-8 



44 



8-6 



14-8 



23-6 



352 



26-4 



16 



8-2 







06 



•51 



1/7 



4-1 



8-0 



13-9 



22-0 



32 9 



247 



17 



77 







06 



•48 



1-6 



3-8 



7-6 



131 



20-8 



31-0 



23-3 



18 



7-3 







06 



•46 



15 



3-6 



71 



12-4 



196 



29-3 



22-0 



19 



6-9 







•05 



•43 



1-5 



34 



6-8 



117 



18-6 



277 



20-8 



20 



6-6 







•05 



•41 



14 



33 



6-4 



111 



177 



26-4 



19-8 



mX s . 



I 



h 



6 Xli' 



t = Tangent offset. 



i Y = i t- 



2 chains in above table. 



G— June 6, 1888. 



