and positions of ^58 double and triple stars ^ &c. 225 



No. DCCVIII. continued. 



Mean Result. 



Position 18° 19' np (20 Obs) ; Distance 6". 677 (15 Obs.) ; 



Epoch 1825.57. 



In 1783 the position was 16° o' np, and in 1802 16*46' 

 npy so that this star has undergone no change. The distance 

 too is nearly as it was. (H.) 



No. DCCIX. R. A. 18^ 52™ ; Decl. 36° ii'N. 

 Struve, 600 ; I. 58. 

 Double ; 8th and 12th magnitudes ; small, pale blue. 



Passy ; July 24, 1825 ; Seven-feet Equatorial. 



Position = 20° 2' np 

 Distances 5 ".556 



5' SL': I dIe^^-;^:; I Excessively difficult. 



5 



This star so much resembles the last measured double star (No. 708), that on ob- 

 serving it in the field of the telescope, I thought I had perhaps neglected to alter the 

 direction of the instrument. The small star bears but the most feeble ilhimina- 

 tion ; and although the night is in every respect favourable for delicate observa- 

 tions, still the results must be regarded with some distrust. 



Passy; July 27, 1825; Seven-feet Equatorial. 

 8th and 11 th, or 1 2th magnitudes. 



Position z= 20° 41' np [ 5 Obs. 

 Distance r: 5".400 J 5 Obs. 



DifF. = o".igz\ Excessively difficult. 



Observed when 15 minutes east of the meridian. Night very fine; but the small 

 star will not bear any illumination. Measures of precarious accuracy. 



Mea?i Result. 

 Position 20° 21' 71 p ; Distance 5^.478 ; Epoch 1825.57. 



In 1783 (1783.21) the angle of position was 13" o' np. 

 Thus in 42.36 years + 7^ 21' have been described, being at 

 the rate of + o°.i73 per annum. (H.) 



MDCCCXXVI. gg 



