and positions 0/36 double and triple stars ^ &c. SSS 



No. XII. R. A. iQ^ 13" ; Decl. 6° 19' N. 

 17 Virginis ; IV. 50; H. and S. 142. 

 Double; 7th and 11th magnitudes. 



Passy ; April 3, 1825 ; Seven-feet Equatorial. 



Position = 66° 46' np 

 Distance = 19". 795 



7 Obs. 

 5 Obs. 



Diff. = 2° 35' > Unsteady. 

 DifF. = o".625 ) Very unsteady. 



Measures extremely difficult, on account of light clouds : the angles were gotten 

 when the stars were on the meridian ; but no observations of distance could be pro- 

 cured till they were 40 minutes west of it. 



Passy ; April 4, 1825 ; Seven-feet Equatorial. 

 8th and 12th magnitudes. 



Position r; 65° 43' np 

 Distance = i9".974 



7 Obs. 

 5 Obs. 



DifF. = 1° 15' ) Very difficult. 

 DifF. zz i".0345 Extremely difficult. 



Passy ; April 29, 1825 ; Seven-feet Equatorial. 



8th and 1 1th magnitudes. 



Position = 66° f npXy Obs. I DifF. = i° 42' 7 Measures of consi- 

 Distance = 19 ".5 96 | 5 Obs. | DifF. = o".4o8 3 derable difficulty. 



Passy ; May 10, 1825 ; Seven-feet Equatorial. 



Position = 66° 25' np 

 Distance = 20". 274 



7 Obs. I DifF. = 1° 47' ) Very difficult. 



5 Obs. I DifF. = I ''.49 1 S Extremely difficult. 



Mean Result. 



Position 66° i^'np (28 Obs.); Distance i9".9io (20 Obs.); 



Epoch 1825.30. 



The difficulty of the measures of this star is no doubt the 

 reason of the disagreement betv^een the result {69° 36'np) of 

 the observations of 1823, and the present. The discordance 

 however is unfortunately such as to prevent any certain 

 conclusion as to the motion or rest of the stars from being 

 dravv^n. (H.) 



