304 Mr. Herschel’s and Mr. South’s observations of the apparent 
39 Draconis continued. 
Position. 
August 20, 1823. 
Five-feet Equatorial. 
s «/ 
Position = 84° 4,0' nf 
Mean - 84.40 Distance == 3". 470. 
Measures excessively difficult ; small star bears no illu- 
mination. 
Mean . 
AB. Position 86° 5' nf ; Distance f ' -599 ; Epoch 1823.63. 
AC. 68 5 w/; 1' 3o".20i ; 1823.46. 
Other observations are, 
1780.78 ; AB. Position 77 0 19' nf ; 
AC. 63 55 nf; 
1802.83; AB. 83 41 nf; Interval = 1 diameter. 
1814.08; AC. 72 + nf ; Distance — i'£; Struve, 
Dorp. Obs. vol. 1. Catalogus ii. p. 51, by mere estimations. 
M. Struve suspects the angle of position of AC to be 
changed. It is perhaps a little, an error of 4 0 being too 
much to commit in the measure of two stars a minute and a 
half asunder. Pie has not observed the close star. The 
angle of position of this was shown by Sir W. Herschel, in 
his paper of 1804, to haye undergone a change of 6° 22' in 
the interval of 22 years, from 1780 to 1802. Our observa- 
tions confirm this by pointing out a further change in the 
same direction— not indeed nearly so considerable, but enough 
04.30 
84-38 
85.10 
84.45 
84. o 
84..^ 
Distance. 
Parts. 
11. 5- 
11. 5 
11. o i>S 
10. 8 
11. o 
Mean = 1 1 . 1 6 
Z — — 0.17 
10.99 
