and positions of ^B^ double and triple stars, ^c, 87 



No. CCCCXCI. continued. 

 Same date ; Five- feet Equatorial. 



Position = 52° n' */| 8 Obs. I Diff. = 3° 37'. Very difficult. 

 Distances: 10". 867 j 3 Obs. | Diff. = I'.zg^, Extremely difficult. 



The night having become hazy, the stars are now remarkably steady. During 

 the observations of position, the haze took off the flare of the large star, and left 

 the small one sufficiently distinct under a good illumination ; after however the 

 position series was procured, a dense fog supervened, the small star became very 

 indistinct, and shortly was invisible ; on this account, no more measures of distance 

 could be obtained, and those gotten are deserving of little confidence. 



Blackman-street ; February 9, 1824 ; Five-feet Equatorial. 



4th and 12th magnitudes. 



Distance = 1 1".843 | 6 Obs. ] Diff. = o".727. 



Passy ; March 5, 1825 ; Seven-feet Equatorial. 



4th and 12th magnitudes. 



Position = 50° 49' sf 5 Obs. I Diff. = 1° 33' ) y „nsatisfactorv 

 Distance = I2".3i8 5 Obs. | Diff. = i".o58 j ^^^ unsatisfactory. 



Stars excessively tremulous. 



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

 4th and 1 1th magnitudes. 



Position = 52° 7' sf 

 Distance = 11 ".154 



5 Obs. 

 5 Obs. 



Diff. = 2° 15' I Tj ^ .1- ,^ 

 Diff. = o".62sl^y*^^^^S^^- 



The sun in the horizon when these observations w^re commenced. The light blue 

 colour of the small star is very distinct. No artificial illumination employed. 



Measures of A C. 



Blackman-street ; February 1, 1824 ; Seven-feet Equatorial. 

 4th and 15th magnitudes. 



s:it" 1 ;^;;t;i* 1 1 8^:: | si: 1 1;:^, } ^--'-^ ""«-'«• 



Measures, particularly of distance, liable to some inaccuracy. 



Mean Result. 

 of A B. Position 51*' 58' sf {3^ Obs.) ; Epoch 1824.82 ; 



Distance i2".o85 (25 Obs) ; Epoch 1824.64. 



of AC. Position 13° 26' sf± (5 Obs.); Distance 4t^".784 



(5 Obs.); Epoch 1824.08. 



