112 
MR. RUMKER’S OBSERVATIONS 
& Hydri. (Ann. Var. + 16".458.) 
Superior Culmination. 
1828. 
Barom. 
Therm. 
Microscopes. 
I. 
II. 
ill. 
IV. 
July 12 
13 
14 
18 
inches. 
29.93 
29.91 
30.01 
30.02 
o 
37 
31 
39.5 
36.5 
o / // 
20 47 49.2 
»> » 53 
» » 50.7 
„ „ 52.0 
47 54.7 
„ 58.0 
„ 54.0 
„ 56.5 
4 X 7 55.3 
48 1.0 
47 58.7 
47 57.2 
/ // 
47 56.3 
„ 56.0 
„ 51.0 
„ 55.0 
July 14 .2. ..Mean... 
Refract. — Reduct. 
Superior Culminat. 
Inferior Culminat... 
Half Diff. S. P. D. 
20 47 51.2 
-1 8.3 
47 55.8 
1 8.4 
47 58.0 
1 8.3 
47 54.6 
1 8.4 
20 46 42.9 
339 39 57.6 
46 47.4 
39 59.5 
46 49.7 
39 59.5 
46 46.2 
40 5.6 
20 33 22.6 
33 23.9 
33 25.1 
33 20.3 
Inferior Culmination. 
1828. 
July 15 
16 
17 
Barom. 
inches. 
30.00 
29.83 
29.65 
51.5 
57.0 
63.0 
July 16 ... Mean ... 
Refract, and Reduct 
Microscopes. 
I. 
339 43 31.0 
„ „ 29.0 
28.3 
339 43 29.5 
-3 31.9 
339 39 57.6 
II. 
43 32.1 
„ 32.0 
„ 30.0 
43 31.4 
3 31.9 
39 59.5 
III. 
43 33.1 
„ 32.0 
„ 30.0 
43 31.4 
3 31.9 
39 59.5 
IV. 
43 40 
„ 36 
„ 36.5 
43 37.5 
3 31.9 
40 05.6 
Mean of 4 Microscopes 20° 33' 23".0 by 7 Observ. 
1828. 
Barom. 
Therm. 
Microscopes. 
1828. 
Barom. 
Therm. 
Microscopes. 
I. 
II. 
III. 
IV. 
I. 
II. 
III. 
IV. 
inches. 
/ 
// 
/ 
// 
/ 
// 
inches. 
! // 
/ // 
/ // 
/ // 
July 20 
29.60 
50 
20 48 
2.2 
48 
0.0 
48 
5 
48 
5 
July 21 
29.59 
49 
339 43 46.7 
43 50 
43 54 
43 55 
22 
29.81 
45.5 
99 
99 
14.0 
99 
17.0 
99 
19.4 
99 
15 
23 
30.00 
57 
99 
43 53 
43 53 
43 58 
44 1 
24 30.03 
35.5 
99 
99 
17.0 
99 
19.0 
99 
21.0 
99 
17.0 
24 
30.07 
50.5 
99 
43 56.5 
43 59.5 
44 0.4 
44 6 
25 
30.14 
35 
99 
99 
16 
99 
20.4 
99 
22.8 
99 
18.7 
26 
30.20 
52.2 
99 
43 57.0 
43 57.0 
43 56.5 
43 59.5 
26 30.29 
35.5 
99 
99 
15.0 
99 
19 
99 
21.0 
99 
20.0 
29 
30.00 
53 
99 
43 50.3 
43 57.4 
43 53.7 
27 30.23 
32 
99 
99 
14.3 
99 
19.0 
99 
22.5 
99 
19 
30 
30.12 
54 
99 
44 0.5 
44 1.4 
44 1.0 
44 3.5 
30 30.22 
27.2 
99 
99 
18.5 
99 
21.4 
99 
26.0 
99 
22 
Aug. 1 
30.20 
50 
99 
43 57.5 
43 59 
43 56.2 
44 1.7 
Aug. 1 
30.24 
37 
99 
99 
15.0 
99 
21.0 
99 
22.5 
99 
20.7 
2 
30.18 
52 
99 
43 54.7 
43 54.7 
43 56.2 
44 0.0 
2 
30.18 
37 
99 
99 
19.0 
3 
30.18 
53.5 
99 
43 58.7 
43 59.2 
43 58.0 
44 4.0 
3 30.22 
37 
99 
99 
17.3 
99 
21 
99 
26.7 
99 
19.2 
July 28 
... Mean ... 
339 43 55.0 
43 56.8 
43 57.1 
44 1.3 
4 30.17 
32 
99 
99 
18.0 
99 
19 
99 
23.3 
99 
15.0 
Refract, and Reduct. 
-3 33.9 
3 34.0 
3 33.9 
3 34.0 
7 
30.14 
32 
99 
99 
11.0 
19.1 
15.5 
15.5 
aaq ao qi i 
40 22.8 
40 23.2 
40 27.3 
July 29 
|... Mean ... 
20 48 
14.8 
48 
17.8 
48 20.5 
48 
17.0 
Itefractand Reduct. 
-1 
10.0 
1 
10.0 
1 
10.0 
1 
10.0 
Superior Culminat 
20 47 
4.76 
47 
7.8 
47 
10.5 
47 
7.0 
Inferior Culminat... 
339 
40 21.1 
40 22.8 
40 23.2 
40 27.3 
Half Diff. S. P. D. 
20 33 
21.8 
33 
22.5 
33 
28.6 
33 
19.9 
Mean of 4 Microscopes. 
20° 33' 23". 2 by 21 Observ. 
Mean S. P. D. of & Hydri, Jan. 1, 1828 20° 33' 23".16 by 28 Observ. 
