11 
MR. RUMKER’S OBSERVATIONS 
2 a Centauri. 
1826. 
Barorn. 
Therm. 
Stars observed. 
S. Pol. Dist. corrected for Polar point. 
Refrac- 
I. 
II. 
III. 
IV. 
tion. 
July 11 
inches. 
29-74 
O 
43 
direct 
30 34 17.0 
/ // 
34 9.6 
34 16.0 
34 18.0 
13 
30.06 
46.5 
direct 
„ 34 17.0 
„ 8.0 
14 
30.17 
39.0 
by reflect. 
263 9 25 
9 26.0 
9 31.0 
9 37.3 
15 
30.13 
42 
by reflect. 
„ 9 25 
„ 25 
„ 28.0 
„ 38.3 
17 
30.08 
38 
by reflect. 
„ 9 32 
„ 36 
„ 33.5 
„ 39.0 
19 
30.10 
46 
direct 
30 34 12 
34 5.7 
34 14.8 
34 16.0 
25 
29.84 
46 
direct 
„ 34 17 
„ 13.5 
„ 18.0 
„ 20.5 
17 
29.93 
45.4 
direct 
30 34 15.8 
34 9.2 
34 16.3 
34 13.6 
28.65 
Mean 15.3 
30.13 
39.7 
by reflect. 
263 9 27.3 
9 29.0 
9 30.8 
9 38.2 
Half Differ, by a mean of the 4 Microscopes .... 1 1 6 17 38.8 
Middle of the Refraction „ „ 28.65 
Half Differ, by a mean of the 4 Microscopes .... 116 17 38.8 
Middle of the Refraction „ „ 28.65 
True Zenith Distance 26 18 7*45 
Apparent Declination 60 6 54.17 
Latitude 33 48 46.72 

Canopus. 
1826. 
Barom. 
Therm. 
Stars observed. 
S. Pol. Dist. corrected for Polar point. 
Refrac- 
I. 
II. 
III. 
IV. 
tion. 
March 4 
inches. 
29.71 
O 
82 
direct 
3°7 37 23 
/ // 
37 23 
37 36.5 
37 30.3 
5 
29.51 
66 
by reflect. 
255 12 14.7 
12 36.2 
12 32.7 
12 35.0 
8 
29.89 
62.5 
by reflect. 
„ 12 14.7 
12 33.0 
12 29-0 
12 28.4 
11 
29.92 
66.5 
by reflect. 
„ 12 11.0 
12 29-3 
12 27-7 
12 24.2 
12 
29.98 
67-2 
direct 
37 37 1.8 
37 16.0 
37 21.6 
37 11.0 
13 
29-88 
71.0 
by reflect. 
255 12 14.0 
12 33.8 
12 26.5 
12 3.3 
14 
29.87 
77 
direct 
37 37 7-3 
37 15.0 
37 24.3 
37 10.3 
16 
30.19 
68 
direct 
„ 37 11.2 
37 15.0 
37 21.1 
37 11.0 
18 
30.06 
81 
direct 
„ 37 7-0 
37 13.5 
37 25.5 
37 13.9 
12.8 
29.96 
75.04 
direct 
37 37 10.06 
37 13.9 
37 25.8 
37 13.3 
18.6 
9-2 
29-80 
66.5 
by reflect. 
255 12 13.6 
12 33.1 
12 29-0 
12 22.7 
18.87 
Half Differ, by a mean of the 4 Microscopes .... 108 47 34.42 
Middle of the Refraction + 18.7 
Middle of the Refraction + 18.7 
108 47 53.12 
True Altitude 71 12 6.88 
Apparent South Polar Distance 37 23 14.67 
Latitude 33 48 52.2 
