340 Mr, South's re^examination of the apparent distances 



No. XVII. R. A. 15^ 18™ ; Decl. 38*^ I'N. 



^/jtcBootis; I. 17; H. andS. 203. 



continued. 



would assign. The direction however is right ; and as the 

 errors required to produce this discrepancy would be very 

 small, we may combine both series of observations for a mean 

 epoch, which will give. 



Epoch 1824.61 ; Position 63° SG> up. 



Difference of Declination of /x Bootis and of the larger of the 

 two stars forming the close double star which is sf it, 



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



Difference of declin. = i' 47". 3 14 | 6 Obs. | Diff. = o".793. 

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



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



Difference of declin. = \' ^y",ig^ | 7 Obs. | Diff. = i".io6. 

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



Passy ; July 2, 1825 ; Seven-feet Equatorial. 



Difference of declin. == i' 47'.6io | 7 Obs. | Diff. r:o".336. 



Observed on the meridian with 181, which power during twilight completely 

 separates the two stars of the close double star. Observed without artificial illu- 

 mination of the micrometer wires ; stars very steady ; measures satisfactory. 



Mean Result. 

 Difference of Declination i'47"-S77(2oObs.); Epoch 1825.48. 



The mean of 12 observations taken July 9, 1823, with the 

 Five-feet Equatorial, was 1' 46^.962, differing only 0^.415 

 from the present determination. 



