u 6 Mr. Herschel’s and Mr. South’s observations of the apparent 
the minimum of distance will be attained in about 40 years 
from the present time, and the change during that period 
much less rapid than heretofore. On the other hand, an 
orbitual motion will be indicated by the distance continuing 
to diminish beyond that limit, and probably too by an acce- 
leration in the angular motion. A certain acceleration indeed 
is already perceptible, io° having been described in the first 
twenty years, and in the last ; but no great reliance is 
to be placed on this, as the earlier measures depend only on 
single observations. Meanwhile the change remarked by 
Sir W. Herschel in his paper of 1804, is fully confirmed 
both by M. Struve’s observations and our own. 
No. XCL R. A. 8 h g m ; Deck 12 0 34' S ; 
19 Argo Navis; Struve 291 ; (Nova); 
Double; 4th and 10th magnitudes; large white; small dusky; 
Position. 
Feb. 5, 1822. 
Distance. 
o 
Parts. 
Five-feet Equatorial. 
sp 
Position = 14°. o' sp 
Mean = 14. 2 
Distance == i*. 10". 536 
Mean = 223.10 
2 0 . 34 - 
223-34 
Position. 
March 22, 1823 
Distance. 
Parts. 
223. 8 j>S 
222. 5 j 
223. oj 
Mean = . 4 - 4 Distance = i '. 9 "887 
Mean zz 222.72 
Z = - i -43 
221.29 
