parallax of certain fixed stars. s 99 
declination (D — D') in seconds, without fractional parts, and 
thence deduces for each star the maximum of aberration. 
Q 
1 
Q 
2 a 
2 a f 
7 Draconis 
39" 
40,4 
4°, 3 
13 Draconis 
39 
40,2 
40.2 
71 Ursae Maj\ 
3^ 
404 
4°, 4 
oc Cassiopeas 
34 
40,8 
41,1 
r Persei 
25 
41 >° 
4T4 
a. Persei 
23 
40,2 
4°, 2 
35 Camel. 
2 9 
4°, 2 
4°, 2 
Capella 
16 
40,0 
39,7 
Mean 
4°>4° 
4°, 44 
I re-computed the maximum of aberr. from column D — D', 
and find the results as in column 2 a ■f, which differ a little 
from Bradley's results in column 2 a , but differ considerably 
from M. Zach's results (Conn, des Temps. 1810, p. 459) as 
to t Persei and 35 Camel. However, M. Zach seems not to 
have attended to Dr. Bradley's remark respecting r Persei, 
and therefore, as to this star, his result is erroneous ; and his 
different result from 35 Camel, must have been an error of 
computation. 
It is evident both from the consistent results, and Dr. 
Bradley's remarks, respecting the annual variation, which he 
deduced from observation, that his observations from whence 
the above results have been deduced, must have been ex- 
tremely accurate. The changes of nutation (evident by his 
observations, but at that time unknown to him) are included 
in the annual variation ; and hence no source of error on this 
Mdcccxviii. R r 
