further scaling Is dom 



computed distance and angle should be r< 

 checked by scaling. We are now ready to t 

 the computing. 



a COMPUTE TMK 



THS OF TANGENTS PRODUCED TO 

 '.SECTION. The plus direction of tht 

 y-axls is taken as north. The tangent of the 

 bearing of PiVt is 



(Throughout, the subscript of an x or a y of any 

 point Is the symbol which designates that point; 

 and the subscript of ft is composed of the two 

 symbols which designate the terminal points of a 

 line.) 



toff S.150 -s..v log 8.250 -.: 



log 1.610 -3.20688 log SiO 63 30' - 0.05236 



l.-k- tnn MM :-., -,,... ..-,.,:, lof 8.627 - 3.55052 



Prom the logarithmic computation we find the 

 bearing and length of PiVi to be N 63* 39> B, 

 8.627ft 

 The tangent of the bearing of ViVt Is 



!* -2.1 -'2o toff . 



toe a.oao s.80760 i to 



45 58' - 0.01473 2.021 - 3.46668 



That Is. the bearing and length of v,v. nrr 

 N 45* 58' W. 5 > negative value of 



the tangent shows that the bearing In 



it the map Indicate* that the t> 



