[ 912 ] 
taining any angle, as the verfcd fine of that angle to 
the difference between the verfed fines of the third 
fide, and of the difference between the fides contain- 
taining the angle. 
Hence if A be the zenith of any place j B the ele- 
vated pole ; C, D two places of the fun in the parallel 
of declination D F j by this propofition in the tri- 
angle ABC, 
3 
Rad. 
