s 
MR. RUMKER’S OBSERVATIONS 
level constantly in the same position to the horizon, so that half the sum of 
the readings R and L is the zenith point, and half their difference the star’s 
zenith distance. 
Canopus. 
Sirius. 
1 
Readings. 
Readings. 
1828. 
Barom. | 
Therm. 
1828. 
Barom. 
Therm. 
R. 
L. 
R. 
L. 
inches. 
O 
O / // 
O / // 
inches. 
O 
O / // 
July 4 
30.152 
58 
18 47 5.75 
July 11 
30.05 
49.3 
17 18 24.5 
6 30.02 
55 
341 12 20 
12 
29.96 
52 
342 40 35 
9 29-74 
56 
„ 47 0.5 
13 
29.91 
47.2 
„ 40 34.5 
11 
30.05 
49.3 
„ 12 15 
14 
30.05 
56.0 
.. 38.0 
m 
29-96 
52 
„ 46 55 
15 
29-99 
57.0 
„ ,5 34.5 
16 
29-703 
65.6 
„ » 39.0 
13 
29.91 
47.2 
„ 47 1.0 
17 
29-85 
64.5 
55 55 46 
14 
30.05 
56.0 

„ 12 18.5 
18 
30.02 
55 
55 55 30 
16 
29-703 
65.6 
„ 47 3.7 
20 
29-62 
55.3 
„ ,, 25.2 
17 
29.85 
64.5 
„ 12 10.7 
21 
29-60 
56.5 
18 
30.025 
55 
„ 47 0.2 
22 
29.94 
54.5 
„ „ 32.2 
20 
29.622 
55.8 
„ 46 56.4 
' 
23 
30.15 
50.7 
,, ,, 8.3 
21 
29-60 
56.2 
„ 12 12.0 
25 
30.21 
53.7 
„ >, 45.0 
oo 
29.94 
54.5 
„ 46 23.2 
26 
30.38 
55 
55 55 51.5 
23 
30.15 
50.7 
„ 46 36.0 
27 
30.24 
47.0 
55 55 40.0 
24 
30 07 
48.5 
12 15 
„ j./* 10 
30 
30 9 6 
46 
55 55 50 
25 
30.21 
52 
„ 46 29-5 
31 
30.24 
49.3 
55 55 26 
28 
30.24 
47 
„ 12 16.0 
Autr. 1 
30.25 
51.3 
,, ,, 42 
30 
30.26 
45.5 
12 38.0 
2 
30.23 
49 
55 55 53.8 
Aug. 1 
30.25 
53 
12 33.0 
3 
30.25 
49.4 
55 55 29.2 
2 
30.25 
49.4 
„ 46 48.9 
13 
30.06 
50 
55 55 15.5 
3 
30.233 
47.5 
„ 12 41.5 
14 00.87 
51 
55 5 5 2 7 *5 
11 
30.18 
49.3 
” 12 30.5 
15 
20.62 
57 
55 55 52 
13 
30.062 
50 
„ 46 33.5 
16 29-65 
57-3 
„ „ 18.7 
14 
29-87 
50.8 
„ 46 34.0 
19 30.10 
47.2 
„ 39 57.7 
15 
29-62 
57*0 
„ 12 31.0 
20 
j 30.09 
48.0 
55 55 52.0 
16 
29-65 
57.3 
„ 46 39.0 
July f 
29.972 
53.1 
342 40 26.55 
19 
30.102 
47.2 
„ 46 43.0 
28 I 
30.074 
52.7 
17 18 44.33 
20 
30.09 
48 
„ 12 32.5 
Refraction. . 
„ - 17.91 
„ + 17-97 
July / 
29.956 
53.4 
,18 46 47-81 
342 40 8.64 
17 19 2.3 
27 
30.04 
52.1 
341 12 24.12 
True Meridian Zenith Distance. . 
17 19 26.83 
Refraction. 
! „ + 19-4 
» - 19.4 
Declinat. from Nautical Almanac 
16 29 17.7 
1 1 8 47 7-2 
341 12 4.72 
Latitude = 
33 48 44.5 
Differ. = true Mer. Zen. Dist.= 
18 47 31.25 
Zenith = — 24.53 
True Declination . 
52 36 15.35 
Latitude. . . 
33 48 44.1 
Zenith = — 
24". 3 
