[ 435 ] 
have the formula B x ~ x — x x. x 
2 CC 
a tt n nT 
= 5 X — 
22 ' 2 
a x- 
7 
x^- x-f x x — x tt ; which, by fubftituting the 
a c c 22 . 
values of the preceding Troblem, and 1 8o degrees 
inftead of a tt, which is the femi-circumference 
of the circle wherein the nutation is performed, be- 
W n 9172919 9961947 %/ 8 7 iff 7 ^ 
comes x - x x x — x 
T 2 10000000 10000000 10000000 
7 180 , 
— x— deg.= 
22 170 
3 y T,~ ]y 9'7 2 9'9 Y 9961947 
365.4 2 ' IOOOOOOO iOOOOOOO 
.. ^ x — x deg. equal, after reduction, to 
IOOOOOOO 22 176 
17". 51"'. 14 
. '/// 
Problem XIV. 
38. To find the difference of the inclination of the 
earth’s axe , between the point of the equinox and 
that of the folfiice , caufed by the action of the 
fun. 
<f 
By Art. 14. the fonnula is i Ax x a a. 
2 ivr 
Putting, inftead of A , its value of Art. 29. inftead 
of which is the ratio of the line of the obliquity of 
r 
the ecliptic to the radius - 2 1 we lhall have 
IOOOOOOO 
T „ 39% 2 *S5 
i* 
3 T 
, A y - - - - y 
3654 2XI/6' IOOOOOOO 
J T * * 
111 2 
- x a 5 and putting, 
in- 
