48 
MR. RUMKER’S OBSERVATIONS 
1828. 
Burom. 
Therm. 
Stars’ Names. 
Observed Ap- 
parent At. 
Observed S. P. D. 
Refraction. 
Sun’s 
Semidia- 
meter. 
Correct. S. P. D. 
of Stars’ Ap- 
parent Place. 
inches. 
h 
m 
S 
O 
/ 
// 
/ 
// 
/ 
// 
J uly 1 3 
29-936 
53.5 
Sun’s upp. limb 
7 
28 
59-85 
111 
35 
52.9 
1 
16.7 
15 45.8 
Ill 
52 
55.4 
29.936 
57.2 
Venus’s lowJimb 
8 
56 
6.95 
103 
49 
58.2 
1 
2.81 
103 
51 
1.0 
29.91 
50 
Sirius 
6 37 
34.09 
73 30 
22.25 
0 
17-99 
73 
30 
40.24 
J uly 1 4 
29.90 
56 
Sun’s low. limb', 
7 33 
3.75 
111 
58 37-1 
1 
16.25 
r. > 
45.9 
111 
44 
7.5 
. . . . 
Venus’s low.limb 
8 
54 
48.12 
103 
40 
56.25 
1 
2.53 
103 
41 
58.5 
30.05 
56 
Sirius 
6 37 34.11 
73 30 
22.5 
0 
17-85 
73 30 40.3 
July 13 
30.02 
60 
Sun’s upp. limb 
7 37 
6.72 
111 
17 57.6 
1 
14.86 
45.9 
111 
34 
58.36 
30.00 
60.8 
Venus’s low.limb 
8 
53 
20.11 
103 
32 
28.4 
1 
1.79 
103 
33 
30.2 
30.00 
52 
A returns 
14 
7 51.05 
110 
3 
41.3 
1 
19-28 
110 
5 
0.6 
29.99 
57 
Sirius 
6 37 
33.99 
73 30 
24.7 
0 
17-78 
73 30 
40.35 
July 16 
29.94 
60 
Sun’s upp. limb 
7 41 
9-63 
111 
8 
30.3 
1 
14.15 
46 
111 
25 
30.45 
29-89 
61 
Venus’s low.limb 
8 
51 
43.44 
103 
24 
44.08 
1 
1.3 
103 
25 
45.4 
29.83 
57 
Arcturus 
14 
7 50.96 
110 
3 
38.82 
1 
18.02 
110 
4 
56.84 
29.74 
59.5 
Aldebaran 
4 
26 
4.88 
106 
8 
15.5 
1 
7-26 
106 
9 
22.8 
29-703 
65.6 
Sirius 
6 37 
34.35 
73 30 
24.75 
0 
17.56 
73 30 
42.3 
July 17 
29.68 
67-3 
Sun’s low. limb 
7 45 
11.97 
111 
30 
6.45 
1 
13.35 
» 
46 
111 
15 
33.75 
69 
Venus’slow.limb 
8 
49 
58.92 
103 
17 
17-0 
0 
59.6 
103 
18 
16.6 
29-65 
63 
Arcturus 
14 
7 
51.09 
110 
3 
43.7 
1 
16.55 
110 
5 
0.25 
29-65 
60 
Antares 
16 
18 
55.69 
63 57 
18.02 
0 
7-71 
63 57 
25.73 
29.85 
59 
Aldebaran 
4 
26 
5.95 
106 
8 
15.15 
1 
7-3 
106 
9 
22.45 
July 18 
29.844 
66 
Sun’s low. limb 
7 
49 
13.71 
111 
19 
48.4 
1 
13.47 
55 
46.1 
111 
5 
15.77 
66.5 
Venus’slow.limb 
8 
48 
6.17 
103 
10 
33.85 
1 
0.0 
103 
11 
33.85 
29.87 
62 
Vindemiatrix 
12 
53 
38.32 
101 
52 
8.67 
0 
58.95 
101 
53 
7.6 
29.90 
59 
Arcturus 
14 
7 
50.81 
110 
3 39.1 
1 
17-89 
110 
4 
57.0 
30.02 
45.2 
Antares 
16 
18 
55.37 
106 
8 
13.4 
1 
9-9 
16 
9 
23.3 
30.02 
55 
Sirius 
6 
37 
34.47 
73 
30 
19.75 
0 
17-87 
73 
30 
37.62 
July 19 
29.995 
60.2 
Sun’s upp. limb 
7 
53 
14.75 
110 
37 36.1 
1 
12.8 
55 
46.2 
110 
54 
35.1 
29.98 
60 
Venus’s low limb 
8 
46 
6.02 
103 
4 
29.75 
1 
0.86 
103 
5 
30.61 
29.96 
55.5 
Vindemiatrix 
12 
53 
38.55 
101 
52 
6.45 
0 
58.91 
102 
53 
5.36 
29.95 
53 
Arcturus 
14 
7 
50.57 
110 
3 
40.8 
1 
18.89 
110 
4 
59.69 
29.95 
51 
Antares 
16 
18 
56.82 
63 
57 
18.05 
0 
7.92 
63 57 25.97 
July 20 
29.622 
55.3 
Aldebaran 
4 
26 
4.87 
103 
8 
4.2 
1 
7.56 
33 
46.26 
103 
9 
11.76 
29.622 
55.3 
Sirius 
6 
37 
34.33 
73 
30 
4.1 
0 
17.61 
73 
30 
21.71 
July 21 
29.59 
57 
Sun’s upp. limb 
8 
1 
15.13 
110 
15 
2.6 
1 
17.94 
33 
46.32 
110 
32 
6.86 
29.58 
57 
Venus’slow.limb 
8 
41 
44.30 
102 
54 
5.8 
1 
0.03 
102 
55 
5.83 
29.59 
52 
Arcturus 
14 
7 
51.26 
110 
3 
30.1 
1 
18.18 
110 
4 
48.28 
J uly 2 2 
29.60 
56.5 
Sun’s upp. limb 
8 
5 
14.89 
110 
3 
36.45 
1 
10.62 
33 
46.45 
110 
20 
33.52 
29-604 
56.5 
Venus’s low.limb 
8 
37 
34.95 
102 
50 
58.02 
1 
0.05 
102 
51 
58.07 
29.94 
48 
Aldebaran 
4 
26 
5.44 
106 
8 
6.82 
1 
9.34 
106 
9 
16.16 
29.94 
54.5 
Sirius 
6 
37 
34.39 
73 
30 
18.5 
0 
17-83 
— 
73 
30 
36.33 
July 23 
29.96 
59 
Sun’s low. limb 
8 
8 
13.31 
110 
23 
7-5 
1 
12.17 
15 46.51 
110 
9 
33.13 
29.96 
60.5 
Venus’slow.limb 
8 
37 
0.33 
