S *2 
MR. RUMKER’S OBSERVATIONS 
a Octantis. (Ann. Var. — 5''.739.) The South Polar Star. 
Superior Culmination. 
Inferior Culmination. 
1827. 
Barom . 
c 
C 
Microscopes. 
Refr. 
Red. 
1827. 
Barom. 
i 
Microscopes. 
Refr 
Red. 
S 
i. 
II. 
iii. 
IV. 
+ 
H 
i. 
ii. 
III. 
IV. 
Aug. 30 
inches. 
20.70 
o 
63 
o / // 
1 1 14.00 
/ // 
1 16.3 
i // 
1 28 
' 1 24.1 
1 21.23 
// 
11.94 
Aug. 28 
inches. 
50.5 
o / // 
359 31 22 
31 25 
31 32.2 
/ // 
31 35.5 
1 29.09 
11.99 
Refract, and lleduct. 
-1 9.3 
1 9.3 
1 9.3 
1 9.3 
30 
30.02 
38 
359 31 23 
31 28 
31 33.4 
31 32.3 
1 31.39 
11.94 
Superior Culminat. 
1 0 4.7 
0 7.0 
0 18.7 
0 14.8 
Sept. 13 
29.83 
41.4 
359 31 18.8 
32.5 
31 36.3 
31 30.0 
1 30.21 
11.25 
Inferior Culminat... 
359 29 39.3 
29 46.5 
29 52.0 
29 50.6 
Aug. 30 
... Mean ... 
359 31 21.3 
31 28.5 
31 34.0 
31 32.6 
l 30.23 
11.73 
Half Di(T. S. P. D. 
0 45 12.7 
45 10.25 
45 13.85 
45 12.1 
Refract, and Rcduct. 
-1 42.0 
1 42.0 
1 42.0 
1 42i0 
359 29 39.3 
29 46.5 
29 52.0 
29 50.6 
Mean of 4 Microscopes . 
1828. 
Barom. 
i 
Microscopes. 
Refr. 
Red. 
+ 
1828. 
Barom. 
g 
Microscopes. 
Refr. 
Red. 
H 
I. 
II. 
III. 
IV. 
-c 
H 
I. 
II. 
III. 
IV. 
Aug. 20 
inches. 
30.10 
o 
61.3 
o / // 
0 59 45 
/ // 
59 45.5 
59 49 
/ // 
59 51.5 
/ // 
1 22.71 
15.38 
Sept. 2 
inches. 
30.15 
o 
12 
o / // 
359 30 2 
30 3.7 
/ // 
30 7 
/ // 
30 b 
/ n 
1 31.06 
15.28 
30 
30.24 
64.7 
» » 53.6 
„ 43 
„ 52 
„ 56.7 
„ 22.52 
„ 36 
3 
29.85 
51 
„ 29 56 
30 1.0 
30 3.5 
,, 5.7 
„ 28.55 
15.26 
31 
30.30 
58.2 
„ „ 51.5 
„ 44 
„ 49.6 
„ 55 
„ 23.80 
„ 34 
7 
29.62 
54.5 
„ 29 53.3 
29 58 
29 58 
» 1.5 
„ 27.24 
15.06 
Sept. 1 
30.20 
70 
„ „ 46.0 
„ 43 
„ 51.5 
„ 53.7 
„ 21.52 
» 31 
8 
29.91 
41.5 
„ 29 58.0 
30 1 
30 1.2 
„ 6.8 
„ 30.40 
15.00 
2 
30.15 
67 
» » 44.2 
„ 43.2 
„ 50.0 
„ 53 
„ 21.88 
„ 28 
9 
29.80 
45 
„ 29 57.5 
30 0 
30 0.5 
1 
© 
„ 29.48 
14.93 
Aug. 31 
Refract 
... Mean ... 
0 59 48.1 
59 43.7 
59 50.4 
59 54 
1 22.48 
15.33 
11 
30.20 
36 
„ 30 0.0 
30 5 
30 5 
„ 32.29 
14.79 
and Reduct. 
-I 7.1 
1 7.2 
1 7.1 
1 7.2 
Sept. 6 
.7. ..Mean... 
359 29 57.8 
30 2.2 
30 2.5 
30 5.45 
1 29.8-1 
15.05 
Superior Culminat. 
0 58 41.0 
58 36.5 
58 43.3 
58 46.8 
Retract, and lleduct. 
— 1 44.9 
1 44.9 
1 44.9 
1 41.9 
Inferior Culminat... 
359 28 12.9 
28 17.3 
28 17.6 
28 20.5 
359 28 12.9 
28 17.3 
28 17.6 
28 20.5 
Half Di(T. S. P. D. 
0 45 14.05 
45 9.6 
45 12.8 
45 13.2 
Mean of 4 Microscopes 
4° 45' 12".41 by 11 Observ. 
Mean S. P. D 
. of a Octantis, Jan 
1, 1828 
0° 45' 1 2".32 by 1 5 Observ. 
r Octantis. (Ann. Var. + 19".293.) 
Superior Culmination. 
Inferior Culmination. 
1826. 
Barom. 
£ 
o 
P 
Microscopes. 
Refr. 
Red. 
+ 
1826. 
Barom. 
i 
9 
6 
Microscopes. 
Reft. 
R«l. 
i. 
II. 
III. 
IV. 
i. 
II. 
III. 
IV. 
June 9 
10 
13 
17 
18 
19 
inches. 
29.95 
30.03 
30.20 
29.85 
30.09 
30.05 
0 
58 
35 
32 
45 
31.5 
41 
o / // 
2 16 40.8 
„ 43 
» „ 40.2 
„ „ 44.5 
„ ,, 44.2 
n »» 55.0 
/ // 
16 42 
„ 36.3 
„ 41.0 
„ 48.7 
„ 50.0 
„ 51.5 
16 19.2 
16 46.1 
16 52 
16 50.0 
16 53.7 
17 1.0 
16 48.9 
16 53.1 
16 55.5 
16 55.3 
17 0.5 
17 4.1 
\ 20.29 
„ 24.29 
„ 25.25 
„ 22.46 
„ 25.05 
„ 23.37 
// 
2.72 
2.69 
2.61 
2.64 
2.62 
2.61 
June 8 
9 
10 
11 
12 
13 
14 
19 
inches. 
29.89 
29.92 
30.03 
30.09 
30.15 
30.22 
30.18 
29.99 
53 
51 
51 
48 
48 
55 
44 
51 
o / // 
359 7 33 
„ „ 35 
« » 37 
» 9) 35 
» » 32 
„ „ 38 
„ „ 36.5 
„ „ 40.0 
7 34.7 
„ 32.1 
„ 31.7 
„ 36.5 
„ 37.0 
„ 36.1 
„ 42.7 
„ 40.5 
/ // 
7 38.5 
„ 42.6 
„ 44.7 
„ 43.0 
„ 39.0 
45.1 
* 43.7 
„ 42.5 
/ /✓ 
7 42.0 
» 37.0 
„ 42.0 
„ 41.2 
„ 41.4 
„ 39.1 
„ 41.2 
„ 45.0 
! H 
1 31-33 
„ 31.80 
„ 32.13 
„ 32.86 
„ 33.05 
„ 31.98 
„ 3.3.86 
„ 32.0 
// 
2.76 
2.72 
2.69 
2.60 
2.61 
2.61 
2.59 i 
2.61 1 

June 13, ... Mean ... 
Refract, and Reduce 
2 16 44.6 
-1 20.8 
16 44.9 
1 20.8 
16 52.9 
1 20.8 
16 56.2 
1 20.8 
1 23.45 
2.65 
Superior Culminat 
Inferior Culminat... 
Half DifT. S. P. I>. 
2 15 23.8 
359 6 0.8 
15 24.1 
6 1.3 
15 32.1 
6 7.4 
15 35.4 
6 6.0 
June 12 
Refract. 
... Mean ... 
and Reduct. 
359 7 35.8 
-1 35.0 
7 36.4 
1 35.1 
7 l-'.l 
1 35.0 
7 41.1 
1 35.1 
1 32-38 
2.66 
.... 1° 34' 41 "47 by 
359 6 0.8 
14 Observ. 
6 1.3 
6 7.4 
0 6.0 
1 34 415 
34 41.4 
34 42.3 j 34 44.7 | 
Mean of 4 Microscopes .. 
