1 26 Mr. Herschel’s and Mr. South’s observations of the apparent 
17 Hydras continued. 
Other measures of this star are, 
Position 83° o ' np; 1782.99; Sir W. Herschel. MS. 
90 on; 1783.03; Ditto, Catalogue of 1785. 
86 30 np ; 1783.01 ; mean of the two. 
8921 sf ; 1802.10; Ditto. MS. 
1821.92 ; Position 85° 12' np ; Distance 4/.906 from A decl. 
4". 70 ; Struve, Dorpat Obs. iii. 
The angle therefore appears liable to no change, any more 
than the distance, for the interval between the discs, being in 
1783 2 1* diameters of the large star, gives about 5 or 6" for 
the distance from centre to centre. 
No. C. R. A. 8 h 49 m ; Decl. 33 0 7' N. 
<r 3 Cancri ; ' Struve 317 ; VI. 41 ; 
Double ; 5th or 6th, and 8th or 9th magnitudes 
Position. 
April 19, 1823. 
Five-feet Equatorial, 
np 
Q O / 
90 — 65. 4‘ 
66. o 
64.48 
64 - 37 
64.10 
65.30' 
65.40 
65. o 
65 - 53 '[ 
6 5 - 5 J 
Mean — — 65.11 
H 
Position = 2 4 0 . 4, 9' n p 
Distance = i' 29".73i 
Distance. 
Parts. 
283. 09 
288. o 
286. o H 
287. 5 
283. 2 
284. o~ 
284. 5 
286. 5 ^»S 
287. 3 | 
285. 7 J 
Mean ~ 285.57 
Z — 1.45 
284.12 
According to Sir W. Herschel, the measures are, 
Position 25 0 12 ' np; Distance T 25". 75 ; 1783.13. 
M. Struve (1821.28) made the Position 23 0 18' np by 5 
measures. Dorp. Obs. iii. 135. 
The distance has sustained an increase of 4'' if both mea- 
sures be correct. 
