C 478 ] 
mer, not enough, however, to caufe any obfervable 
change in the rifing of the fixed ftars ; we may take 
the difference, at a medium, at 20 or 22 years; which 
will bring us to the year before Chrift yBo. for the 
time when Heiiod flourifhed. 
Nor will the argument from aftronomy be at all 
inconfiftent with this determination. For in the year 
before Chrift 580. the time of the winter l'olftice was 
December 27. in the morning; and 60 days after that 
will bring us to February 2f. when the Sun’s true 
place, at noon, was io s 20° 4.7' 30", his declination 
fouth ii° 33' 56 ', and his right afeenfion 33 i y 
53 5-3' . Then, in the figure here, 
O / II 
Tan. NO —i i 33 56 9.3109992 
— R-]-coc.NKO— 51 55 00 9.8941114 
KN— 91345 9.2051106 
= the Sun’s afcenfional difference. 
From the year before Chrift 580. to the end of the 
year after Chrift 1689. are 2269 years ; the preceftion 
for which time is i* i°3o'fo"; which, liibtr acted 
from 6 s 1 9 0 53' 52' , as before, gives the place of 
Ardturus, the year before Chrift 580 == 5 s 3 8" 23' 2"; 
and the angle D CE, in the 2d figure, = 78° 23' 2". 
Then 
Rad. -f- cof. D C E = 78 23 02 i9-3°395^9 
— Cot. D C = 23 29 00 — 10.3620437 
Tan. CE = f 00 00 8.94191 72 
P C = 59 03 00 
Cof. PE = 54 03- o 
I 
9.7 686966 
Cof. 
