and positions of 36 double and triple stars , &c. 35 1 
No. XXI. R. A. i6 h 8 m ; Decl. 34 0 20' N. 
<r Coronas ; I. 3 ; H. and S. 222. 
continued. 
The mean angular velocity corresponding to the whole 
interval is -{- 2°.964 — say 3 0 . The great and almost sudden 
increase of angular velocity from 2 0 to nearly 7 0 per annum, 
is not verified ; and the angle 40° o' nf for 1819, on which 
it rests, must of necessity have been considerably in error. 
Now this is the very angle which, according to the table 
(p. 252, Phil. Trans. 1824. III.) gives a deviation of 9 0 2' 
from the computed place, so that the hypothesis there assumed 
respecting the orbit is considerably supported by the present 
observations. (H.) 
No. XXII. R. A: i6 h 35® ; Decl. 31° 56' N. 
£ Herculis ; I. 36 ; H. and S. 237. 
Passy ; July 28 , 1825 ; Seven-feet Equatorial. 
The evening being very favourable, I examined this star 
very attentively with the magnifying powers 181, 327, 413, 
512, and 787; not the slightest appearance either of a 
second star, or of any elongation of £ : with 787 it was ex- 
quisitely defined, and as round as possible. 
No. XXIII. R. A. i7 h 3 m ; Decl. 54 0 43' N. 
p Draconis ; II. 13 ; H. and S. 242. 
Double ; equal ; each of the 8th magnitude. 
Passy ; April 3 , 1825 ; Seven-feet Equatorial. 
Distance = 4".47o | 5 Obs. | Diff. = o'*. 529. Unsteady. 
Observed with 413, when if hour east of the meridian; half the object-glass 
rendered useless by the intervention of the timbers of the observatory. 
