1908-9.] The Systematic Motions of the Stars. 
391 
Stream II. 
Star’s Name. 
Mag. 
R.A. 
Dec. 
Proper 
Motion. 
B. b. 
a Canis Majoris . 
-1-3 
li m 
6 41 
-16-6 
// 
131 
- 36 100 
9 Hydra .... 
3-8 
9 9 
+ 2-7 
35 
- 4 106 
Piazzi VI. 59 
6-0 
6 13 
- 22*7 
34 
+ 29 96 
80 Piscium 
5-7 
1 3 
+ 5-1 
32 
- 31 108 
Lalaude 25818 . 
6-4 
13 59 
+ 11*3 
32 
- 3 80 
6 Andromedse . 
6-0 
23 6 
+ 43-0 
28 
- 9 127 
45 Bootis .... 
5-0 
15 3 
+ 25-3 
26 
+ 27 89 
Groombridge 2630 
8-0 
18 34 
+ 63-6 
26 
0 125 
a Opliiuchi 
2-1 
17 30 
+ 12-6 
25 
+ 31 73 
y Ceti .... 
3-8 
2 38 
+ 2-8 
22 
-25 117 
Groombridge 717 
6-3 
3 32 
+ 42-2 
22 
-27 158 
23 Andromedse . 
5-6 
0 8 
+ 40-5 
20 
+ 3 122 
21 Eridani 
6-3 
3 34 
- 6-0 
21 
+ 3 112 
5 Leonis .... 
2-6 
11 9 
+ 21-1 
21 
+ 21 107 
A Piscium .... 
4-6 
23 37 
+ P2 
20 
-16 96 
The directions of the 110 stars which did not fall within 60° of the 
directions of either A or B were examined, but no evidence was found to 
indicate that they belonged to a third stream. 
The proper motions of the stars classified as belonging to Streams I and 
II were treated by Airy’s method of determining the solar apex. The 
following positions were found for A and B : — 
A. K. A. 93° Dec. -7°. 
B. R.A. 246° Dec. - 64°. 
The position of A agrees almost exactly with that found in my previous 
paper (R.A. 94° Dec. — 7°) ; that found for B lies between the position 
found there (R.A. 240° Dec. —72°) and the assumed position (R.A. 255° 
Dec. — 60°) of this paper. 
With the above positions of A and B and relative velocities of the two 
streams in the proportion 3 : 2, the apparent motion in two streams may 
be resolved into a motion of the solar system towards a point — 
(Apex) R.A. 283° Dec. + 44 ; 
and a motion of two streams in opposite directions in the direction — 
(A r ertex) R.A. 268° Dec. -21°. 
Corresponding to the velocities 3 and 2 for the two streams, the velocity 
of the solar motion is T55, and the relative velocity of the two streams 404. 
If instead of using the positions of A and B found by Airy’s method, 
those found in my previous paper are used, the co-ordinates of the apex are 
found to be R.A. 281°, Dec. + 42°, and of the vertex R.A. 268°, Dec. — 24°. 
