. and positions of 36 double and triple stars ^ ^c. 339 



No. XVII. R. A. 15^ IS'" ; Decl. 38^ 1' N. 



sf fi Bootis ; I. 17 ; H. and S. 203. 



Double ; 8th and 10th magnitudes. 



Passy ; June 12, 1825 ; Seven-feet Equatorial. 



Position = 64° 14' np \ 7 Obs. | DifF. = 1° 29' [ Difficult. 



Observed when on the meridian with 327 : I could not obtain any measures of 

 distance, on account of the extreme unsteadiness of the stars. 



Passy ; June 13, 1825 ; Seven-feet Equatorial. 



9th and 10th magnitudes. 



Position = 63° 32' «P I 7 Obs. DiiF. = 3° 9' \ niffi-nlt 

 Distance = i".396 I 5 Obs. | Diff. = o".43z J-^^^cuit. 



Observed with 327, when on the meridian. Measures satisfactory. 



Passy ; June 17, 1825 ; Seven-feet Equatorial. 



8| and 10th magnitudes. 



DifF. =3° 39' 



DifF. = o''.4o8 



I Easy. 



Position r= 63° z^'np I 7 Obs. 

 Distance r= i"-377 | 5 Obs. 



Observed with 327 : stars well defined, and 35 minutes east of the meridian. 



Passy ; June 19, 1825 ; Seven-feet Equatorial. 



9th and 9^ magnitudes. 



Position = 63° 25' np I 7 Obs. I Diff. = 2° 11' J ,, ^ A-oi. 1* 

 Distances As73 | 5 Obs. | Diff. = o".3i2} ^^^ ^^<^"^*- 



Stars on the meridian, and admirably defined. Measures obtained with 327, and 



considered very satisfactory. 



Passy ; June 23, 1825 ; Seven-feet Equatorial. 

 8th and 10th magnitudes. 



Position = 63° 7' np\7 Obs. I Diff. = 1° 30' > r>;n;^„,. 

 Distance = i".339 | 5 Obs. j Diff. =o".3365 ^^"icuit. 



Observed with 327 ; stars on the meridian, but very unsteady. 



Mean Result. 

 Position 6s° S^'np^ss Obs.) ; Distance i".42i (20 Obs.); 



Epoch 1835.45. 



These measures, compared w^ith those of 1823, give a 

 motion of only —0° 10' instead of — 1° &, which calculation 



