_ PHYSICAL anv LITERARY. 149 
angle CBS, that is, the angle BCD, is 
§°17'-5017808, Again, to determine the 
angle CDS, 
Thelog. tang. of half the angle 
ACD is.’ 10.055728¢ 
The difference of the logs. of na 
AS, SP is Weipa 0.0806086 
The difference 9: 9751199 
is the log. tang. of 43°21° ~ 5819834, half 
the difference of the angles CSD, CDS ; 
therefore the eagle CDS, that is, the angle 
DCF, is 3°59’. 6671212. 
AGAIN, as the radius is to the fine 
of 17. -5017808 the angle BCD, fo is 
57°.2997795 to the angle A, 
The log. of §7°.2957795 is 1-7581226 
The log. fine of Sa 17 45017808 
is — 8.9642388 
The fum is 19.7223607 
The log. of radius is 10, 0000000 
_ ‘The difference 0.7223607 
Is 
