22 
Mr. South’s observations of the apparent distances 
No. CCCCVI. R. A. i b 59 m ; Decl. 2 5 0 5' N. 
14 Arietis ; Struve, 56 ; VI. 69. 
Double ; large, whits ; small, blue ; 6th and 10th magnitudes. 
Blackman-street ; December 9, 1823 ; Five-feet Equatorial. 
Position = 8° 7' np 
Distance= 1' 45". 3 49 
5 Obs. 
5 Obs. 
Diff.= i° 5' ) tv u 
DifF. = 2''.o2of Dlfficult * 
Stars very steady ; but the evening hazy. 
Blackman-street ; December 30, 1823 ; Seven-feet Equatorial. 
6th and 10th magnitudes. 
Position =7° 49 np 
Distances i' 45''. 167 
5 Obs. 
5 Obs. 
Diff.=o° 32' } 
Diff. = o ".529 \ 
Mean Result. 
Position 7 0 58' np ; Distance 1. 45".258 ; Epoch 1823.97. 
The position and distance of this star in 1783 are stated at 
11 0 12' np and 1' 29" 28'". The change of position is not 
material ; but with respect to the increase of distance, it may 
be remarked once for all, that there is great reason to suspect 
a considerable instrumental error in all the measures of that 
early period, exceeding 40", the result being constantly (or 
most commonly) in defect, and that not unfrequently to a 
very large amount. The cause probably lies in the con- 
struction of the micrometer used ;* and its effect is to throw 
a great uncertainty on the earlier distances of all stars of the 
5th and 6th classes. Fortunately these are the least replete 
with interest. (H. ) 
* It is certainly not from a wrong determination of its scale. 
