distances and positions of 380 double and triple stars, &c. 271 
No. CCXLII. R. A. 17 1 * 3 m ; Decl. 54 0 43' N. 
si. f* Draconis ; II. 13 ; Struve, 539. 
Double; equal. 
Position. 
H 
S 
Mean 61.39 
May 18, 1821. 
Five-feet Equatorial. 
sp or nf 
Position = 6i°. 39 ' sp or ?if 
Distance = 
Distance. 
Parts. 
I 5 * 0 ) 
14. o f 
•5- 1 I 
*4- o; 
12. oq 
13. o 
12. O 
* 3 - * 
1 3 - 3 
13. 2 
H 
Mean 13.47 
Z — — 1. 10 
i 2 -37 
The measures of this star arranged in order of time, are 
1781.73; Position 37 0 38' sp or nf; Distance 4"-354 ; H. Catal. of 1782. 
50 32 sp or nffk 
49 o sp; /- D°. Account of Changesj &c. 
54 4 sp; J Mean of the three 1803.45 ; Pos. 49°52' A-j? 
60 o sp; Distance 4". 1 90; Struve, Additam. p. 191. 
61 39 sp or nf; H and S. ut supra. 
59 12 sp; A decl. =: 4".oo5 (6 measures; whence we compute 
distance =: 4".6i9) Struve) Dorp. Obser. iii. 
Zach viii. 525. 
Or, grouping together observations made about the same 
epoch, 
I 
l 
{ 
1802.17; 
1 804.09 ; 
1804.10; 
1819.74; 
1821.38; 
1821.80; 
o 
1 7 ® 1 -73 J Position 37.63 \ 1 2 0 . 23 in 21,72 years, or o°.s63i per annum. 
1803.45; 49.86-1 . 
\ io°.43 in 17.52 years, oro°.5953 per annum. 
1820.97; 60.29 J 
No doubt therefore can remain of the reality of an angular 
motion in this star, as announced by Sir William Herschel 
