136 
MR. RUMKER’S OBSERVATIONS 
a Hydri. (Ann. Var. + 17".62.) 
Superior Culmination. 
Inferior Culmination. 
1823. 
Barom. 
O 
§ 
Microscopes. 
1823. 
Barom. 
i 
Ol 
g 
Microscopes. 
i. 
11. 
ill. 
IV. 
I. 
II. 
ill. 
IV. 
May 25 
26 
inches. 
29.75 
29.56 
o 
54 
60 
o / // 
163 32 35.2 
163 32 32.5 
33 29.8 
33 23 
/ // 
33 31 
33 23.3 
33 6.4 
33 1.2 
May 26 
27 
June 3 
10 
11 
inches. 
29.60 
29.66 
30.27 
30.02 
30.02 
57.5 
56 
50 
47.5 
44 
O / ✓/ 
108 31 11.7 
„ „ 14.7 
»» j* 32.5 
„ „ 28.4 
» » 33.4 
32 10.5 
„ 16.7 
„ 32.0 
„ 24.8 
„ 32.1 
/ // 
31 54.7 
32 0.3 
32 2.3 
32 15.3 
32 19.1 
/ // 
31 32.0 
„ 31.5 
„ 46.3 
„ 45.4 
„ 54.5 
May 25 
Refract 
... Mean ... 
and Reduct. 
163 32 33.8 
+31.1 
33 26.4 
31.1 
33 27.1 
31.1 
33 3.8 
31.1 
Superior Culminat 
Inferior Culminat... 
Half Diff. S. P. D. 
163 33 4.9 
108 22 20.9 
33 57.5 
23 19.0 
33 58.2 
23 4.1 
33 34.9 
22 37.7 
June 3 
... Mean ... 
108 31 24.1 
-9 4.2 
32 23.2 
9 4.2 
32 8.3 
9 4.2 
31 41.9 
9 4.2 
27 35 24.3 
M< 
35 24.4 
;an of 4 1\ 
35 24.3 
[icroscope 
35 24.4 

ittii cu. 1 . (iuu ncuuen 
108 22 20.9 
7 Observ. 
23 19.0 
23 4.1 
22 37.7 
1828. 
Barom. 
i 
o 
H 
Microscopes. 
1828. 
Barom. 
i 
« 
A 
H 
Microscopes. 
i. 
II. 
III. 
IV. 
I. 
II. 
III. 
IV. 
May 28 
29 
31 
June 1 
6 
7 
12 
13 
16 
17 
inches. 
29.89 
29.83 
30.01 
30.05 
29.57 
29.44 
29.98 
30.03 
30.05 
30.19 
o 
47 
47.2 
46 
44.7 
46 
46.7 
38 
36 
41 
38 
o / // 
27 49 28.1 
„ „ 34.3 
„ „ 25.7 
„ „ 25.0 
*» » 25 
„ „ 30.7 
„ „ 30.8 
„ „ 38.0 
„ „ 42.0 
„ ,, 31 
/ ✓/ 
49 30.4 
„ 34.0 
„ 27 
„ 28.5 
„ 29.2 
„ 28.7 
„ 32.0 
„ 33.0 
„ 32.5 
„ 31.0 
49 36.2 
„ 34 
„ 33.3 
„ 32 
„ 34 
,, 34.2 
„ 37.2 
„ 40.5 
„ 38.0 
„ 33.5 
/ /✓ 
49 28 
„ 32 
„ 26.4 
„ 22.7 
„ 27.5 
„ 28 
„ 34 
„ 36.5 
„ 47.0 
,, 37 
May 29 
June 1 
7 
10 
17 
inches. 
29.84 
29.99 
29.47 
29.72 
30.03 
o 
42.3 
43.3 
51 
48.5 
51.5 
332 45 40.0 
_ „ 40.0 
„ „ 24.7 
,, „ 36.7 
„ „ 32.0 
45 44.3 
„ 44.8 
„ 30.6 
„ 41.5 
„ 34.0 
/ // 
45 48.8 
„ 49.0 
„ 35.6 
„ 45.0 
„ 39 
/ // 
45 35.5 
„ 36.0 
„ 21.0 
„ 30.8 
„ 30.0 
June 7 
Refract. 
... Mean ... 
and Reduct. 
332 45 34.7 
-7 48.9 
45 39.0 
7 48.9 
45 43.5 
7 48.9 
45 30.6 
7 48.8 
332 37 45.8 
37 50.1 
37 54.6 
37 41.8 
Mean of 4 Microscopes 27° 35' 26".68 by 15 Observ. 
June 7 
Refract. 
.7. ..Mean... 
and Reduct 
27 49 31.1 
-50.8 
49 30.6 
50.8 
49 35.3 
50.8 
49 31.9 
50.8 
Superior Culminat. 
Inferior Culminat... 
Half DiflT. S. P. D. 
27 48 40.3 
332 37 45.8 
48 39.8 
37 50.1 
48 44.5 
37 54.6 
48 41.1 
37 41.8 
27 35 27.2 
35 24.9 
35 24.9 
35 29.7 
Mean S. P. D. of a Hvdri, Jan. I, 1828 2 7° 35' J25". 9 by 22 Observ. 
