distances and positions of 380 double and triple stars , &c. 173 
<y Virginis continued. 
angular motion observed being no less than 41 0 , places the 
fact of a great change beyond dispute. In the first 25.9 years 
of this period the angle described was 13°.(>4 ; in the next 
21.3 years, io°.4i were described; in the next 17.0, the 
change was if.o 6 ; and in the last 2?.i, i°.86. The respec- 
tive mean annual motions corresponding to which are o°.$2j, 
o°.4,89, o°. 886 and o°.886. The change of distance is more 
than sufficient to account for the acceleration on the supposi- 
tion of an elliptic orbit. The star is a very interesting one, 
and deserves to be narrowly watched. 
No. CLI. 
R. A. i2 h 36 m ; Decl. 2 0 54/ 
Struve, 421 ; III. 53; 
Double ; 7th and 8th magnitudes. 
Position. 
90 — 12. 81 
*i-35 
10.30 l c 
11.46 
12.20 
n-3° 
Mean — 11.38 
Position. 
o o > 
90—11.35- 
12.15 
12.29 
ix. 15 
1 1.42^ 
H 
Mean ~ — 11.51 
May 23, 1823. 
Five-feet Equatorial. 
11 p 
Position — 78° 22' np 
Distance = i6".26i 
June 5, 1823. 
Five-feet Equatorial: 
7 and 8 magnitudes. 
np 
Position =78 °g' np 
Distance = 17" .271 
Distance. 
Parts. 
52. 21 
5°* 3 I 
53- 7 
52. 8 
5+- 5. 
Mean == 52.70 
Z — — 1.21 
51.49 
Mean ~ 55.90 
Z — — 1. 21 
54.69 
Measures taken when the stars were 2 h 24® west of me- 
ridian, but are beautifully defined. (H.) 
