Figf. 66 



Referring to Fig. 66, the problem definitely stated is: For 

 what vertical angle (v) is the line KI cos- v, r\% of Kl shorter than 

 KI ? Now, 



n% = n-^-100 and 

 KI cos 2 v = KI (r\% KI) 



cos 



v = l (n-i- 

 v= = V 1 _ ( n 



100) 



100) 



cos v will therefore equal the square roots of .99, .98, .97, 

 etc. The table following is computed from this formula. 



116 



