320 Dr. Brinkley’s results of the application of 
Mean zenith distances reduced to Jan. ist, 1825, found by applying the index correction, as determined by 
the collimator, to the observed zenith distances, and reducing them by the equations. 
Tab. I. 
Face of Circle. 1 
East. 
West. 
1825. 
a Andre 
irnedae. 
Oct. 8 
25 15 45* *7 8 
( 
H 
44*5 2 
21 
46,22 
2 5 
46,60 
Nov. 3 
47>°7 
4 
46,70 
7 
45*55 
9 
46,71 
10 
47580 
1 
25 15 44,63 
1 1 
>4 
45* 1 4 
16 
46,17 
*7 
45*05 
24 
46,17 
2 S 
46,04 
Means 
25 15 46,32 
2 5 *5 45*63 
46,32 
Mean 
25 15 45,92 
By Catalogue 
45,60 
Using single observation of col- 
limator made nearest to the time 
of obser 
/ation of the 
>tar. 
Oct. 8 
25 *5 45^5 
H 
45*35 
21 
46*43 
2 5 
45 * 7 i 
Nov. 3 
47 * 3 ° 
4 
46*93 
7 
45*56 
0 9 
44,89 
S 10 
46,58 
1 1 
2 5 *5 45 * DI 
h 
45522 
16 
46,76 
17 
45*59 
2 4 
46,25 
2 5 
46,12 
Means 
25 15 46,04 
25 15 45,82 
46,04 
Mean 
25 15 45*93 
1 
By Catalogu 
e 45,60 
Face of Circle. 
North pole dist, 
Jan. 1, 1825 , 
by collimator. 
N. P. 
dist. by 
Cata- 
logue. 
Diff. 
East. 
West. 
Pola 
ris. 
O / // 
« Cassiopae . . 
34 2 5 2 4,68 
24,36 
+ 0,32 
34 59 17*44 
Aldebaran . . 
73 5 i U30 
1,91 
— 0,61 
18,51 
Capella.. .... 
44 11 26,26 
27,22 
— 0,96 
17,88 
(3 Tauri 
61 32 57,67 
59* 2 6 
— i *59 
18,37 
a, Orionis .... 
82 38 0,17 
i *45 
1,23 
18,98 
Sirius 
106 28 57,74 
57*37 
+ o *37 
18,85 
Procyon 
84 20 0,34 
o ,47 
— 0,13 
18,56 
Arcturus .... 
69 54 7*68 
7*53 
+ 0,15 
18,83 
« Cor. bor. . . 
62 41 25,40 
25**3 
+ 0,27 
18,63 
a Serpentis. . . 
83 1 0,70 
0,09 
-f 0,61 
19*78 
« Herculis . . . 
75 24 10,13 
9*65 
+ 0,48 
17,87 
a Ophiuchi. . . 
77 18 17,64 
16,67 
+ 0,97 
18,60 
y Draconis . . . 
38 29 11,62 
1 1,61 
+ 0,01 
34 59 * 9* 6 9 
a. Lyrae 
51 22 25,05 
24,82 
+ 0,23 
16,92 
a. Aquilae .... 
81 35 11,27 
10,76 
4- 0,51 
18,94 
« Cygni 
45 20 26,28 
26,76 
— 0,48 
17 * 7 ! 
2 « Capricorni 
103 4 45*53 
45,61 
<—0,08 
18,80 
as Pegasi . . . . . 
75 44 3*05 
2,72 
+ °*33 
1 7*5 3 
a. Andromedae 
61 52 32,43 
32,10 
+ °*33 
Polaris 
1 37 28,40 
28,44 
— 0,04 
34 59 l8 * 5 2 
34 59 18,26 
18,52 
Mean 
diff. 
— 0*03 
Mean 
34 59 i8 *39 
ByCatalogue 
18,06 
The above polar distances 
are deduced 
from the zenith distances by applying the 
38 14 16,05 
38 14 13,23 
co lat. 36 36 46,5 ; and the catalogue 
H *75 
referred to is 
mine 01 1823, 
given in the 
15*34 
Phil. Trans. 1824. 
15,09 
16,19 
J. BRINKLEY. 
16,26 
16,43 
15*30 
15*59 
H ,75 
13,1s 
14,46 
13*75 
17*25 
16,40 
s 38 14 15,67 
38 14 14,72 
15,67 
Mean 
38 14 15,20 
By Catalogue 
14*94 
Co. lat. by Polaris, 
36 36 46,8. 

1825. 
f. w. 
8 
f. vv. 
*5 
f. w. 
21 
f. W. 
f. w 
f. w 
f. w 
f. w 
f. w, 
1825. 
Aug. 22 
12 
f. W. 
20 
f. W. 
28 
f. w. 
Nov. 10 
f. w. 
10 
f. w. 
1 1 
f. w. 
18 
f. w. 
Means 
