40 
MR. RUMKER’S OBSERVATIONS 
Northern Solstice, June 1828. 
True Meridian 
Corr. for 
True Zenith Dis- 
1828. 
Zenitli Dist. of 
Sun’s 
tance ot Tropic 
Sun’s Centre. 
LaUtude. 
of Cancer. 
// 
o 
/ // 
June 12 
56 0/ 54.85 
+0.17 
18 
20.30 
57 
16 15.32 
13 
5 7 1 41.76 
0.31 
14 
39.18 
„ 21.25 
14 
„ 4 51.50 
0.42 
11 
23.35 
„ 15.27 
15 
„ 7 43.59 
0.49 
8 
31.77 
„ 15.85 
16 
„ 10 9.9 
0.53 
6 
5.04 
„ 15.47 
17 
„ 12 16.0 
0.50 
4 
2.95 
„ 19.45 
18 
„ 13 50.08 
0.49 
2 
25.42 
„ 10.00 
19 
„ 15 8.69 
0.43 
1 
12.99 
„ 22.10 
20 
„ 15 57.40 
0.28 
0 
25.1 
„ 22.78 
21 
„ 16 17.50 
0.16 
0 
2.2 
„ 19.66 
oo 
„ 15 57.30 
+ 0.04 
0 
4.08 
„ 1-42 
25 
„ 13 24.6 
—0.38 
O 
38.3 
„ 2.52 
26 
„ 11 47.4 
0.53 
4 
18.92 
„ 5.79 
28 
„ 7 25.61 
0.75 
8 
54.74 
„ 19.6 
29 
„ 4 13.45 
0.81 
11 
48.96 
„ L61 
30 
„ 1 6.0 
0.83 
15 
8.33 
„ 13.50 
July 2 
56 52 59.4 
—0.73 
22 
59.17 
15 57.84 
57 16 13.46 
Luni-solar nutation.. 
+ 9.3 
Mean zenith distance of Tropic ofCancer. 
57 16 22.76 
Mean obliquity 
23 27 43.1 
Latitude 
33 
48 39.66 
This solstice was observed partly by reflection. 
Southern Solstice, December 1828. 
Observed alternately direct and by reflection. 
1828. 
True Mer. Zen. 
Distance of Sun’s 
Apparent Place. 
Corr. for 
Sun’s 
Latitude. 
Reduction to 
Solstice. 
True Zenith Dis- 
tance of Tropic 
of Capricorn. 
Dec. 14 
15 
16 
17 
18 
19 
20 
21 
10 35 17.34 
„ 31 53.9 
„ 29 1.96 
„ 26 34.9 
„ 24 29.9 
„ 22 56.43 
„ 21 54.93 
„ 21 19.77 
-6.32 
—0.19 
-0.05 
+ 0.08 
0.24 
0.38 
0.50 
+ 0.59 
/ // 
— 14 2.37 
10 38.92 
7 43.36 
5 15.73 
3 16.41 
1 45.20 
0 42.15 
- 0 7.48 
?0 21 14.65 
„ „ 14.80 
„ „ 18.55 
„ „ 19.25 
„ „ 13.73 
„ „ 1L61 
,, „ 13.28 
„ „ 12.88 
Luni-solar nutation 
10 21 14.83 
— 9.8 
Mean zenith dist. of Tropic of Capricorn 
Mean obliquity 
Latitude 
10 21 5.03 
23 27 42.78 
33 48 47.81 
This solstice was interrupted on account of my depar- 
ture. 
Solstices observed with the Mural Circle. 
The reductions of these solstices have been made as well with the view of 
deducing the obliquity of the ecliptic from the polar point found by upper and 
lower culminations of circumpolar stars, as to correct this polar point by an 
assumed obliquity, for the reduction of the stars observed with the mural 
circle. 
