M. Struve’s Observations on Double Siars. 
524. Variable star in the Whale, E. Asc. lO;. , Decl. 3“^ 48' S. 
The greatest star is variable, and of a decided red colour at 
its greatest lustre. Its very small companion follows it a little 
to the north. 
Angle of Position in 1819, 1® 24' N. Foil. Struve. 
DifF. in R. Asc. 
Distance, 
Diff. of Declin. 
Distance, 
+ 7".682- 
1' 54". 25 
+ 2 .79 
J 1 44 .2 ) 
|1 53 .Oj 
Ditto, 
Ditto, 
Ditto. 
Herschel, 
30 Aries, R. Asc. 2T. Decl. 5^2' N. 
6th-7th and 7th Mag. 
1819, Diff, of !R. Asc. — 2". 766 Str.uve. 
Distance, 38 .26 Ditto. 
1780, Distance, 31 1 Herschel, 
26. >j Perseus. II. Asc. 2}^ 38'. Decl. 55" 8, N. 
4th and 8th Mag. 
Angle of position in 1779, 20° N. Free. Herschel, 
1819, 29° 9' Struve, 
Distance, 1779, 26" Herschel. 
1819, 28" 5 Struve. 
Difference of Decl. + 14".2 Ditto, 
27. 6 Orion. R. Asc. 5‘' 26'. Decl. 5° 32' S. 
This is a group of five stars forming a trapezium, and envel- 
oped in a nebulosity. The first star (in R. Asc.) is of the 7th 
Mag., the 2d of the 8th Mag., the 3d of the 5th Mag., and the 
4th of the 6th-7th Mag. M. Struve found the angles of position 
to be as follows, in 1819 : 
3d and 4th. 1st and 3d. 1st and 2d. 2d and 4th. 2d and 3d. 
.29° 45' N. Foil. 45° 9' N. Free. 58° 8' N, Foil. 31° 0' N, Free. 74° 0 N. Free. 
28. cr Orion. R. Asc. 5^ 80'. Decl. 2° 43' S. 
A triple star. The 1st is of the 4th Mag., the 2d of the 7th 
Mag., and the 3d of the 7th Mag. In 1819, 
1st and 2d. 1st and 3d. 
The angle of position was 6° 5' N. Foil. 28° 35' N. Foil. 
Difference of R. Asc. -f 0".90 -j- 2". 442 
Sir W. Herschel found the angles of position 5° N. F, and 
29° N. P.y and the distance between the 1st and 3d 43".2. 
