38 
MR. RUMKER’S OBSERVATIONS 
The three preceding Solstices were observed partly by Sir T. Brisbane, and 
partly by myself; but the Northern Solstice and Southern Solstice of 1823 , 
which follow, were exclusively observed by Sir T. Brisbane. 
1823. 
True meridian 
Zenith dist. of 
Sun’s centre. 
Reduction to 
Solstice. 
Corr. for 
Sun’s 
Lat. 
True Zenith 
Dist. of Tropic 
of Capricorn. 
Dec. 10 
O / H 
10 57 45.2 
— 36 37-8 
— 0.88 
1°0 21 6.56 
11 
„ 52 0.8 
31 
3.0 
0.90 
„ 20 56.90 
13 
„ 42 16.9 
21 14.8 
1.0 
„ 21 1.1 
15 
„ 34 14.5 
13 16.3 
0.9 
„ 20 57-3 
18 
„ 25 41.1 
4 47.8 
0.5 
„ 20 52.77 
20 
„ 22 34.2 
1 29.3 
-0.25 
„ 21 4.65 
oo 
„ 21 1.4 
0 
3.6 
+ 0.05 
„ 20 57-85 
24 
„ 21 38.8 
0 30.4 
+ 0.26 
„ 21 8.66 
26 
„ 23 51.1 
2 52.3 
+ 0.37 
„ 20 59-17 
27 
„ 25 46.3 
4 45.2 
+ 0.30 
„ 21 1.4 
1824. 31 
„ 38 2.4 
16 58.0 
— 0.12 
„ 21 4.28 
Jan. 2 
„ 46 57.8 
-25 53.7 
-0.26 
„ 21 3.94 
Mean 10 21 1.21 
Luni-sol. nut., and Red" to Jan. 1, 1823 +2.81 
4.02 
M. Z. D. Tropic of Capricorn, Jan. 1, 1823 10 21 
From former observations, Mean zenith ) ^ - ~ 
dist. of Trop. of Cancer, Jan. 1, 1823. j * ' ° 
Half diff. mean obliquity 23 27 41.25 
Half sum latitude 33 48 45.26 
Idie following Solstices have been observed by myself. 
Northern Solstice, June 1826. 
True Meridian 
Corr. for 
True Zenith Dist. 
1826. 
Zenith Dist. of 
Sun’s 
Reduction to 
of Tropic of 
Sun’s Centre. 
Latitude. 
Solstice. 
Cancer. 
o / // 
/ 
/ // 
O /_ *L 
June 12 
56 56 2.7 
+ 0.5 
+ 20 24.9 
57 16 28.1 
14 
57 3 18.9 
0.4 
13 2.4 
„ „ 21.7 
15 
„ 6 28.9 
0.4 
9 58.2 
,, „ 27.5 
16 
„ 9 6.9 
0.2 
7 18.7 
„ „ 25.8 
17 
„ 11 23.4 
—0.1 
5 3.8 
„ „ 27.1 
18 
„ 13 14.6 
0.1 
3 13.3 
„ „ 27.8 
19 
„ 14 41.0 
0.2 
1 47.9 
„ „ 28.7 
20 
„ 15 39.3 
0.4 
0 47-0 
„ „ 25.9 
21 
„ 16 14.3 
0.5 
0 11.2 
„ „ 25.0 
22 
„ 16 26.3 
0.6 
0 0.0 
„ 25.7 
23 
„ 16 12.8 
0.7 
0 13.7 
„ „ 25.8 
24 
„ 15 34.9 
0.8 
0 52.1 
„ „ 26.2 
25 
„ 14 30.1 
0.8 
1 55.2 
„ „ 24 5 
26 
„ 13 6.4 
0.8 
3 23.1 
„ „ 28.7 
27 
„ 1J 9.0 
0.8 
5 15.7 
„ „ 23.9 
28 
„ 8 51.6 
0.7 
7 33.0 
„ „ 23.9 
29 
„ 6 13.8 
0.6 
10 14.9 
„ „ 28.1 
July 1 
56 59 26.6 
—0.4 
+ 16 51.9 
„ „ 18.1 
57 16 26.25 
Luni-solar nutation .. 
+ 4.9 
Reduction to Jan. 1, 1827 ••• 
—0.2 
Mean zenith distance of Tropic of Cancer 
57 16 30.95 
From former observations mean zenith ) 
10 °1 16 
di stance of Tropic of Capricorn ) 
Half diff. mean obliquity, Jan. 1, 1827 ... 
23 27 44.65 
Southern Solstice, December 1826. 
1826. 
True Meridian 
Zenith Dist. of 
Sun’s Centre. 
Corr. for 
Sun’s La- 
titude. 
Reduction to 
Solstice. 
True Zenith Dist 
of Tropic of Ca- 
pricorn. 
O 
/ 
10 
21 
6.66 
21 
5.99 
21 
11.76 
21 
3.32 
20 58.30 
21 
0.05 
21 
5.13 
21 
5.81 
21 
7.97 
20 
57.69 
21 
2.80 
21 
5.51 
10 
21 
4.25 
6.34 
10 20 
57-91 
57 
16 29.90 
23 
27 
46.00 
4 - 
QC 
-~ 
QC 
O 
Dec. 16 
17 
18 
21 
22 
23 
24 
25 
26 
2!) 
30 
31 
10 30 
„ 27 
„ 25 
„ 21 
„ 20 
„ 21 
., 21 
„ 22 
„ 24 
„ 31 
„ 35 
„ 39 
16.27 
33.47 
25.36 
24.38 
58.46 
7.72 
48.5 
53.35 
28.4 
43.95 
14.46 
10.50 
+ 0.66 
0.75 
0.83 
0.76 
0.67 
0.59 
0.45 
0.30 
0.29 
+ 0.25 
- 0.11 
—0.48 
- 9 10.27 
6 28.23 
4 14.43 
0 21.82 
0 0.83 
0 8.16 
0 43.82 
1 47.84 
3 20.14 
10 46.51 
14 11.55 
-18 4.51 
Mean 
Luni-solar nutation and reduction 
Mean zenith distance of Tropic of Ca- } 
pricorn, Jan. 1, 1827 S 
From last solstice, mean zenith distance } 
of Tropic of Cancer, Jan. 1, 1827 ) 
Half difference, mean obliquity 
Half sum latitude 
