MR. RUMKER’S OBSERVATIONS 
70 
Abstract of the Equal Altitudes and Comparisons with the Transit. 
1827. 
Sidereal Clock at 
Apparent Noon 
b> E ’ al \lti- 
t tides o.'the Sun. 
Transit 
more or 
less. 
Culmination of /3 Crucis by Clock. 
Observed Diffe- 
rence of Right 
Ascension be- 
tween Sun and /3 
Crucis Mean 
Place by Equal 
Altitudes for 
Noon and Mid- 
night in Degrees. 
Culmination of 2 a Centauri by Clock. 
Observed Diffe- 
rence of Right 
Ascension be- 
tween Sun and 2 
a. Centauri Mean 
Place for Noon 
and Midnight by 
Equal Altitude 
in arc. 
By Equal Alti- 
tudes. 
Transit 
more or 
less. 
By Equal Alti- 
tudes with Reduc- 
tion for Aberra- 
tion and Nutation 
to Mean Place 
and Precession to 
September 23. 
By Equal Alti- 
tudes. 
Transit 
more or 
less. 
By Equal Alti- 
tudes with Reduc- 
tion for Aberra- 
tion, Nutation 
and Precession to 
the Mean Place, 
September 23. 
h m s 
s 
h ni s 
s 
h m s 
Aug. 31 
10 34 23.805 
0.0 
12 37 44.343 
-0.29 
12 37 45.005 
30 50 18 
Sept. 1 
10 38 2.268 
+0.4 
12 37 44.34 
+0.09 
„ „ 45.005 
29 55 41.05 
S. Mid. 1 
22 30 50.273 
12 37 44.34 
„ „ 45.005 
29 28 40.98 
Sept. 2 
10 41 39.441 
12 37 44.34 
„ „ 45.005 
29 1 23.46 
3 
10 45 17.550 
+0.52 
12 37 44.34 
+0.25 
„ „ 45.005 
28 6 51.825 
4 
10 48 53.975 
+0.63 
12 37 44.34 
+0.42 
„ „ 45.005 
27 12 45.45 
10 
11 10 33.513 
-0.426 
12 37 43.497 
+0.04 
„ .. 44.22 
21 47 40.69 
11 
11 14 8.964 
-0.82 
12 37 43.585 
-0.19 
„ „ 44.308 
20 53 51.17 
Mid 11 
20 20 -10 305 
13 
11 21 20.411 
12 37 43.575 
-0.5 
.. „ 44.311 
19 5 58.5 
14 
11 24 55.967 
+0.608 
12 37 43.53 
44.272 
18 12 4.575 
Mid. 14 
0 37 43.795 
„ „ 44.54 
h in s 
s 
h m s 
15 
11 28 32.033 
+0.607 
12 37 44.266 
-0.486 
„ 44.34 
17 18 14.74 
14 28 0.29 
-0.35 
14 28 0.404 
44 52 5.565 
Mid. 15 
23 30 20.16 
0 37 44.898 
„ „ 45.65 
16 51 22.35 
16 
11 32 7.691 
+0.389 
12 37 44.267 
-0.397 
„ „ 45.024 
16 24 19.995 
14 28 0.325 
14 28 0.465 
43 58 11.595 
Mid. 16 
23 33 56.744 
0 37 44.688 
„ „ 45.449 
15 57 10.575 
19 
12 37 46.516 
„ „ 47.286 
13 42 48.09 
14 28 2.265 
—0.24 
14 28 2.473 
11 16 35.895 
Mid 10 
0 37 47.005 
„ „ 47.776 
13 15 56.805 
2 28 3.244 
2 28 3.460 
40 49 52.065 
20 
11 46 31.898 
+0.392 
12 37 46.988 
-0.25 
„ .. 47.760 
12 48 57.93 
14 28 3.29 
14 28 3.515 
40 22 54.255 
Mid 20 
23 48 20.09 
0 37 47.002 
„ „ 47.774 
12 21 55.26 
2 28 2.876 
2 28 3.103 
39 55 45.195 
21 
11 50 7.574 
+ 0.596 
12 37 47.188 
„ „ 47.941 
11 55 5.05 
22 
12 37 47.715 
Mid *22 
0 37 48.056 
„ „ 48 81G 
2 28 3.577 
23 
11 57 20.00 
+0.60 
12 37 48.474 
-0.60 
„ „ 49.236 
10 7 18.54 
14 28 4.260 
-0.36 
14 28 4.536 
37 41 7.94 
Mid. 23 
23 59 9.495 
0 37 48.906 
„ „ 49.669 
9 40 2.61 
24 
12 0 56.807 
+ 0.293 
12 37 48.859 
„ „ 49.623 
9 13 12.24 
Mid. 24 
0 2 44.544 
0 37 48.96 
„ „ 49.733 
8 46 17.835 
25 
12 4 33.492 
0.0 
12 37 48.801 
+0.23 
„ „ 49.566 
8 19 1.11 
14 28 5.170 
-0.865 
14 28 7.103 
35 52 59.94 
Mid. 25 
0 6 21.4 
0 37 49.828 
„ „ 50.695 
7 52 19.425 
2 28 5.662 
2 28 6.023 
35 26 8.85 
26 
12 8 10.156 
+0.506 
12 37 50.785 
-0.53 
„ „ 51.552 
7 25 20.94 
14 28 6.349 
+0.32 
14 28 6.688 
34 59 7.98 
From the 31st of August to the 4 th of September, the rate of the clock was 
absolutely = 0, so that I have made use of the mean of the equal altitudes 
observed during that period. 
