Motion of the Sun, and solar System. 233 
apparent motion of the six stars, will be much reduced. The 
quantities which are required for constructing another figure 
to represent the threefold motions of our six stars, when a 
different apex is fixed upon, are to be found by the same 
method we have pursued in the instance of x Herculis ; and 
the figure that has been given with respect to that star, shows 
evidently that the parallactic line SP should be turned more 
towards the line sa, representing the apparent motion of Sirius. 
We shall accordingly try a point near the following knee of 
Hercules, whose right ascension is 270° if, and north polar 
distance 54 0 45'. 
The result of a calculation of the angles and the least quan- 
tities of real motion of our six stars, according to this apex, is 
collected in the following Table, and represented in Fig. 3. 
Table VI. 
Stars. 
Angles of the parallactic Motion 
with the Parallel. 
Angles of the apparent with the 
parallactic Motion. 
Least Quanti- 
ties of the 
real Motion. 
Sirius - 
Arcturus 
Capella - 
Lyra - 
Aldebaran 
Procyon 
O ! 0 
68 51 5 south-preceding 
29 30 32 south-preceding 
77 54 0 south-following 
27 38 47 north-following 
66 20 17 south-following 
64 48 27 south-following 
0 / n 
0 i 25 south preceding 
25 59 10 south-following 
6 r8 38 south-following 
28 42 9 north-preceding 
10 921 south preceding 
14 46 1 south-preceding 
Sum 
n 
0,0004561 
0,9145072 
0,0509727 
0,1557761 
0,0217607 
0,3159051 
1". 4593779 
By this Table it appears that the annual proper motion of 
our six stars may be reduced to 1", 4,594, which is o ", 7655 less 
than the sum in the 5th Table, where the apex was x Herculis. 
In the approximation to this point it appeared, that when 
the line of the parallactic motion of Sirius is made to coincide 
