tangent. 12 is rewritten from ! 1'J plus 



Ji' plus Hi; J." is ir, plus E5, and so on. 

 K and L contain the subchord deflections. 

 rithms 3 and 4 will need no explana; 



11. AI.INKMKNT N >TES FOR LOCATION. 

 We are now ready to enter the results of our com- 

 putations in the field book in the usual form of 

 alinement notes. 



Location Alinement Notes. 



Com i 

 ' Point. Deflections. 



3 + 22 PC, lU'iirini: N 



isSta. HI + 2;,,n pn-liiniiiary. 



59 



-8 PT, 62 IT N 16 



58 59 



45 



44 :? .vs' 



43 + 01 PC,8R 0OO' N4:- - \\ 



41 i RO Rg' W 



4 + OH PT! 54 48.5' N 8 5 1 



61 6O* 

 89 48 50' 



' ' 6 C ' 

 24 8 



'2-2 + 72 PCi 6 L GO (K)' N 03 



21 +41 CIit*k: Thin i-lnt IH 21 + 83.3 on j,i 

 "2\ 



I 



III i: M\l HEMATICS OF PAPER LOCATION: 

 OO-ORDINA li:s -To compute 

 the location field notes without employing rect- 

 angular co-ordinates, proceed thus: 



e location having been laid d<> 

 map as shown, scale'] > 'Ci. and v 



the protractor scale the bearings of these three 

 lines. 



2. Comoute the central angles &i and /\. 

 8. Compute curve len^ 1 Lt. 



mputo tangent distances Ti and Ti. 

 5. Compute lengths of timgents PiP( 

 and PTtPC fc 



17 



