and positions of 458 double and triple stars y &c. 267 



No. DCCLXVII. R. A. 20^ 43" ; Decl. 51° 1/ N. 



Struve, 698 ; II. 100. 



Double; 8th and 11th magnitudes. 



Passy ; August 20, 1825 ; Seven-feet Equatorial. 



Position = 150 34' nf\ 5 Obs. I Diff. = 2° 28' J Excessively difficult. 

 Distance = 4 .575 | 5 Obs. j DifF. = o".48i > ' 



Night very favourable ; the small star scarcely bears any illumination. Observed 

 when 35 minutes east of the meridian. 



Passy ; August 21, 1825 ; Seven-feet Equatorial. 

 7th and 11th magnitudes. 

 Position =: 15° 25' nf 



Distance = ^'-907 



6 Obs. 

 5 Obs. 



Diff! = o°.36o} Excessively difficult. 



The small star is light blue. Observed on the meridian. A small portion of 

 the object-glass not employed, in consequence of the interference of the observatory 

 timbers. 



Passy ; September 1, 1825 ; Seven-feet Equatorial. 

 ^'th and 1 1 th magnitudes. 



Position = 15° 12' ra/ 

 Distance = 3".744 



5 Obs. 

 5 Obs. 



Diff! = t^.tiz} Excessively difficult. 

 A cloudless sky ; but the stars are extremely unsteady and ill defined; added to 

 these circumstances, a small portion of the object-glass (perhaps one-eighth) is 

 rendered useless by the unfortunate situation of the timbers of the observatory. 



The observations of position agree w^ell enough ; but it is 

 otherwise with those of distance. The night of August the 

 20th was much more favourable than either of the nights on 

 which the star was subsequently measured ; and as the mean 

 of the distances procured on those nights will differ but little 

 with that obtained on the 20th, if we take the three sets we 

 shall probably not err much when we give as the 



Mean Result. 

 Position 15° 24' nf {16 Obs. ) ; Distance 4".409 (15 Obs.) ; 



Epoch 1825.65. 

 There appears not the least change of position in these 

 stars, the angle here given differing no more than o*' 27' from 

 what it was in 1783. (H.) 



