and positions of 36 double and triple stars , &c. 
321 
No. VI. R. A. 7 h 23 m ; Decl. 32 0 i7'N» 
Castor ; II. 1 ; H. and S. 81. 
continued. 
Mean Result. 
Position 6° 42' sp (42 Obs.) ; Epoch 1825.23 ; 
Distance 4". 767 (20 Obs.) ; Epoch 1825.26. 
Note; In taking the mean, the ten observations of February 18 are considered 
equivalent to the seven of which the other sets are composed. 
These measures, compared with those recorded in the Phi- 
losophical Transactions for 1824, afford, in the short interval 
of 2 y .i2, a very satisfactory verification of the quantity as 
well as of the direction of the motion there assigned. The 
angle at that epoch (1823.11) was 5 0 1 ' sp. It is now 6° 42' sp. 
The motion then is — 1° 41' or retrograde, as it ought to be. 
Now, if we compute the motion on the supposition of the 
actual angular velocity being (as there assigned) — o°.777, 
we shall find — i° 38', differing insensibly from the observed 
quantity. That this degree of exactness is not quite acci- 
dental, other similar instances to be adduced will convince 
us. (H.) 
No. VII. R. A. 7 h 58™ ; Decl. 28 0 o' N. 
11 Cancri ; I. 11 ; H. and S. 88. 
Double ; 8th and 9- magnitudes. 
Blackman-street ; March 12 , 1824 ; Five-feet Equatorial. 
Position = 83° 24' np I 5 Obs. 1 Diff. = 3 0 o' } 
Distance = 4".694 | 5 Obs. | Diff. o".853 j ’ * * 
Blackman-street ; March 31 , 1824 ; Five-feet Equatorial. 
8th and 9| magnitudes. 
Position 83° 7' np 5 Obs. 
Distance = 4".659 5 Obs. 
t t 
Diff. = 2 0 46' 7 
Diff. = o".22i 3 ’ ' ’ 
MDCCCXXVI. 
