E 02 
Wcftw. South w. 
the fir; a II Star, Feb. 14, 169011 52,380 
7] Bootis Feb. 14, 16904 18,541 
V Bootis Apr. 5, 1 69 jji 32,557 
7 ! Bootis May 4, 16911 32,906 
7 ] Bootis May 27, 16921 30,752 
By tt Bootis May 27, 16921 36,707 
77- Bootis Feb. 14, 1 690 not obi'erv. 
3^:43 
5,88 
b >7 5 
11,87 
*2,74 
37>°7 
34^9 
But the Star tj Bootis appears alfo to have moved 
Southward. 
By hr Bootis 
7r Bootis 
By y Bootis 
Feb. 14, 1690 
May 2 7, 1692 
A pr- 5> l6 93 
i // 
o 29,503 
o 25,049 
o 34=712 
By a mean o 29,755 
As Arthur us appears to have moved fouthward of 
7] Bootis 2 r 9 h 3 1 5 by taking a mean of the four 
quantities refulting from the companions with that 
Far; and as Bootis has alfo moved fouthward of 
fome of the neighbouring final i ftars by 29 v , 75 5 in 
the fame time, A returns upon the whole has moved 
2' 39^06 to the fouth, by the comparifons with 
7] Bootis only j and therefore, by taking a mean of 
all the refults, Ardturus has altered its right afcen~ 
fion lefs than the neighbouring fears by 1' 33^, 97 in 
78 years, in which time it has alfo moved 2' 36'''', 81 
to the fouth of the fame bars. 
In order to fee how far the motion of right afeen- 
fion is to be depended upon, which is deduced from 
the above comparifons, I have feledfed and com- 
puted the following obfervations, made at Shirburn 
caftle 
