distances and positions of 380 double and triple stars , &c. 255 
£ Coronas Borealis continued. 
Position. 
90 — 58.28' 
58.5° 
57-3° r-H 
60.48 
6 *-35- 
Mean — 59.16 
May 3, 1823. 
Five-feet Equatorial. 
6 and 6^ magnitudes. (H) 
n p 
Position =30°. n P 
Distance = 7". 062 
Mean . 
Position 30 37' np ; Distance 7". 168 ; 
Distance. 
Parts. 
23. o" 
21. 4 
23. 2 > 
23. o 
22. 4 J 
H 
Mean z= 22.60 
Z — — 0.24 
22.36 
1822.30. 
Other observations are, 
1781.70. Position 25 0 51 ' np ; Dist. = 5". 4/68- H. Cat. of 1782^ 
The distance here set down is a mean of two observa- 
tions, 4". 687 and 6"- 25 ; and in the MS. it is expressly 
stated that (in the former measure) both diameters are 
included. The measure itself is probably too small, as the 
vacancy between the stars is estimated at 3 D, and the 
diameter of a star of the 6th magnitude can hardly be less 
than i"£ or ; 6". 25 is therefore probably a better mea- 
sure, and would give 4"-75 for the central measure in 1781. 
1819.47. Position 29 0 54 ' np; Distance ~ Struve, Additam. 190. 
1822.60. Distance ~ 6".o7. D°. Astronomische Nachr. N°. 22. 
On the whole therefore the distance appears to have 
undergone some small increase, while the position also seems 
liable to a slow variation in a direct sense ( nf sp ). 
