278 ^^' South's observations of the apparent distances 



No. DCCLXXXII. R. A. 21^ 6» ; Decl. 9° 17'N. 

 S Equulei ; Struve, 715 ; IV. S7. 

 Double ; 5th and 15th, or 20th magnitudes ; I have often 

 looked for the smalL star in England, but could never 

 detect it. 



Passy ; October 2, 1824 ; Seven-feet Equatorial. 



Position = 47° 34' «/ 1 5 Obs. Diff. = i^ 45' ] Excessively difficult. 

 Distance = 25 .492 | 5 Obs. DifF. = 2 .452 ) ' 



The small star is so extremely faint, that it cannot be seen even in the unillu- 

 minated field, without great attention. The observations were made with 105 ; and 

 although the night is unusually favourable for delicate determinations, yet the 

 measures here given must be received with some suspicion. 



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



5th and 15th, or 20th magnitudes. 



Position = 48° i8'»/| 10 Obs. I DifF. = 4° 20' } Excessively difficult 

 Distance = 26". 77s I 7 Obs. | Diff. = o'.yeg J Excessively amicuit. 



Observed on the meridian with 157. Night very fine ; the accuracy of the results 



is perhaps questionable. 



Mean Result. 

 Position 48° s' nf (15 Obs.); Distance 26''.240 (12 Obs.) ; 



Epoch 1825.26. 

 This star appears to have sustained a very extraordinary 

 change both in distance and position. Sir W. Herschel's 

 measures are as follows : — 1781.80 (Oct. 22)Pos. 11° 39' nf, 

 Dist. 19". 533- Thus in 43.46 years no less an arc than 

 — 36° 24' has been described, being at the rate of — 0^.838 

 per annum, and a change of distance to the amount of -[- Gf'.yoj, 

 or + o".i54 per annum. 



An observation in a 20-feet sweep in 1785 confirms the 

 fact of the angle made by the two stars being then small. 

 "^Equulei, double, very unequal, a few degrees nf. S.r." 



