228 Mr. Herschel’s and Mr. South's observations of the apparent 
Five-feet Equatorial. 
June 5, 1823. 
(s/> Bootis) continued. 
Seven-feet Equatorial. 
June 5, 1823. 
np 
90 — 22.57 ) 
29.10 5 
H 
Mean — 26.4 
1 st Position = 63° 56' np 
2d Position == 64 25 np 
Distance = i / x .522 
Position. 
O O / 
90— 27.47 
22.30 
24. o 
27.55 
28. o 
27.20 
23. o 
24. 1 o^ 
> H 
Distance 
Parts. 
7. 2' 
7. o 
7 - 9 
8. 4 
7. o 
7 - 5 . 
>»H 
Mean r= 7.50 
Z 1= — 1.17 
6-33 
Mean — 25.35 
Mean result. 
Position 63° 42' np ; Distance i".652 ; 1823.41. 
Other measures are, 
1782.68; Position 87° 14' np ; MS. Also “ Account of Changes,” &c, 
1802.66; 76 14 wp ; Ditto, Ditto, &c. 
1821.78; 62 3 np; Struve, Dorpat Obs. Vol. 3. Vide Zach. viii. p. 523. 
The change in the position of the small star here is 
established by indisputable evidence ; the star f* being for- 
tunately placed at a very convenient distance to serve as a 
mark of reference, and nearly in the direction of the small 
star, being about 8i° np. In 1781 it was remarked by Sir 
W. H. that the small star followed the line joining the large 
one and and in 1802 that it had changed sides, and pre- 
ceded the same line. Our observations and M. Struve’s fully 
confirm this change. In the interval of 19.98 years between 
the observations of 1782 and 1802, the motion observed was 
11 0 , and in the additional period of 20.75 years, a further 
motion in the same direction of 1^.55 appears to have taken 
