26 Mr. Herschel's and Mr. South's observations of the apparent 
No. 
III. R. A. o h 23 ' ; Decl. 5°57' N. 
51 Piscium ; Struve 7 ; IV. 70 ; 
Small star ; ruddy, or plum coloured ; 6th and 9th, or perhaps 
10th magnitudes. 
Position. 
Mean 
Nov. 13, 1823. 
Seven feet Equatorial. 
nf 
Position =7°. 11 ' nf 
Distance = 23". 866 
Measures difficult, small star, 
bears only a bad illumination. 
Mean ~ x 1 1.59 
Z — — ■ 4.01 
107.58 
The position, Aug. 19, 1783, was o°.3 6' nf (Second Cata- 
logue). As a slight deviation from the parallel is easily per- 
ceived, this measure could not possibly be 7 0 in error, and 
the position must therefore have altered ; though from the 
great difficulty of the measures, it is impossible to speak posi- 
tively to the amount of the change. 
The distance in 1783, was 22" , 48. A MS. observation of 
Sep. 4, 1782, makes it 20". 57 “ not exact.” A comparison 
of these with the present distance, renders it probable that 
the stars are receding from each other. 
M. Struve makes the angle 7 0 6' nf by 4 measures taken 
1820.95. Dorpat Obs. iii. 1820. Obs. 69 and 90. 
