«54* 13/- Herschel 0 ft the Direction of the 
with its apparent motion, we may soon obtain a certain mini-* 
mum of the other parallactic motions ; but as Sirius is not the 
star which has the greatest proper motion, it occurred to me 
that another minimum, obtained from the line in which Arcturus 
appears to move would be more accurate ; for, on account of 
its great proper motion, we have reason to suppose it more 
affected than other stars, by the parallax arising from the 
motion of the sun ; and, with a view to this, I soon was led to 
a point not only in the line of the apparent motion of Arcturus, 
but equally favourable to Sirius and Procyon, the remaining 
two stars that have the greatest motions. 
If the principle of determining the direction of the solar 
motion by the stars which have the greatest proper motion be 
admitted, the following apex must be extremely near the 
truth ; for, an alteration of a few minutes in right ascension or 
polar distance either way, will immediately increase the re- 
quired real motion of our stars. Its place is : right ascension 
2 45° 5 ^ an< 3 north polar distance 40° 22'. 
The calculated motions of the same stars by this apex will 
be as in the following Table, and are delineated in Fig. 4. 
Table VII. 
Stars. 
Angles of the parallactic Motion 
with the Parallel. 
Angles of the apparent with the 
parallactic Motion. 
Least Quanti- 
ties ot the 
real Motion. 
Sirius - 
Arcturus 
Capella - 
Lyra 
Aldebaran 
Procyon - 
O i II 
58 24 56 south- preceding 
55 29 45 south-preceding 
83 44 17 south-preceding 
36 28 33 south-following 
89 48 35 south preceding 
59 43 10 south-preceding 
Oil) 
10 24 44 following 
003 preceding 
24 40 21 following 
92 49 30 following 
13 18 58 following 
9 40 46 preceding 
Sum 
// 
0,20157 
0,00003 
CM9358 
0,32396 
0,02842 
0,20839 
O", 95595 
