which Jorm Binary Systems. 41 



% I. m, R. A. 4^ 49'. Decl. N. 1° 23'. ' >•(>?>''-. 



This star is double. The two are both of the 10th magni- 

 tude, a star of the 5th magnitude following it to the south. 

 In 1783.06 the position was 84° 54' nf, and in 1825.04 it was 

 by Mr South''s observations at Passy, 83° 49' sf or n p, and 

 the distance 9!'. 5^5. Hence here has been a change of 11° \T 

 in forty-two years, or — 0°.269 yearly. This star is likely 

 to prove a binary system, and should therefore be carefully 

 watched. , 



3. 32 Orionis, R. A. B^ 21'. Decl. N. 5° 48'. 



The two stars are in contact with a power of 303. They 

 are unequal. In 1785 the angle of position was 52° 10' s p. 

 In 1822, (^&^ W sp^ and distance less than 1".3. The measures 

 of this star are of the utmost difficulty. It may be a binary 

 system. 



4. I. 70, R. A. 9^ 26/. Decl. N. 2P 53'. 



- The two stars are of the 9th and 9| magnitude. In 1782.86 

 the angle of position was 36° 24' s p. In 1825.03 it was 21° 

 89' s p, and the distance 2". 97. The annual change has there- 

 fore been + 0°,35, a quantity too great to arise from error of ob- 

 servation. 



5. I. 84, R. A. Q^ 26'. Decl. N. 41° 43'. 



This is a very close double star, of the 9th and 10th mag- 

 nitude. A power of 133 shows it double, and a power of 303 

 distinctly separates the two stars, which are of a light-blue co- 

 lour. It is extremely difficult to measure. In 1783.25 the 

 angle of position was 14° nf. In 1824.58 it was 4° 59^ nf, 

 and the distance 1".664. The annual change is 4-0°.219. 



6. I. 69, R. A. 6'^ 51'. Decl. N. 53° 1'. 



The stars are of the 8| and 8| magnitude. In 1782.87 its 

 position was 77° 24' s f. In 1824.59 the position was QQ" 54' 

 s /i and the distance 3".891 . The annual change is — 0^.252. 



7. III. 48, R. A. 7'^ 15'. Decl. N. 20° 48'. 



The stars are of the 8th and 9| magnitude. In 1783 the 



