AT THE OBSERVATORY AT PARAMATTA 
39 
Northern Solstice, June 1827. 
1827. 
True Meridian 
Zenith Dist. of 
Sun’s Centre. 
Corr. for 
Sun’s 
Latitude. 
Reduction to 
Solstice. 
True Zenith Dist. 
of Tropic of 
Cancer. 
/ 
n 
// 
/ // 
// 
June 13 
56 
58 
53.58 
-0.65 
+ 17 24.19 
57 
16 
17.52 
1457 
2 
27.50 
0.67 
13 50.13 
16.96 
15 
5 
37.91 
0.66 
10 40.05 
17-30 
16 
8 
20.11 
0.64 
7 54.53 
14.00 
18 
12 
33.00 
0.35 
3 37-39 
10.04 
19 
14 
2.6 
0.20 
2 5.96 
8.36 
21 
15 
59.53 
-0.08 
0 17-46 
16.91 
24 
15 
32.6 
+ 0.42 
0 40.88 
13.90 
25 
14 
36.52 
0.50 
1 38.30 
15.32 
26 
13 
14.1 
0.59 
3 0.49 
15.18 
27 
11 
33.06 
0.67 
4 47.36 
33 
21.09 
28 
9 
17-1 
0.68 
6 59.13 
16.91 
29 
33 
6 
38.56 
+ 0.67 
+ 9 35.29 
33 
33 
14.52 
Mean 
Luni-solar nutation 
Reduction, Jan. 1, 1827 
Mean zenith distance of Tropic of Can- 
cer, Jan. 1, 1827 
From former observation of Tropic of 
Capricorn, Jan. 1, 1827 
Half diff. mean obliquity, Jan. 1, 1827 ... 
Half sum latitude of the observation. 
57 16 15.2 
+ 7.5 
+ 0.26 
57 16 22.96 
10 20 57.91 
23 27 42.52 
33 48 40.43 
Southern Solstice, December 1827. 
Observed alternately direct and by reflection. 
1827. 
True Meridian 
Zenith Dist. of 
Sun’s Centre. 
Corr. for 
Sun’s 
Latitude. 
Reduction to 
Solstice. 
True Zenith Dis- 
tance of Tropic 
of Capricorn. 
o 
// 
! 
27 
// 
Dec. 3 
li 
49 
13.01 
+ 0.4 
i 
57.8 
10 
21 
15.60 
6 
33 
24 
24.66 
0.77 
i 
3 
17.25 
8.18 
7 
11 
17 
13.47 
0.8 
55 
55.8 
18.47 
8 
10 
13.9 
0.82 
49 
0.65 
14.12 
9 
3 
39.44 
0.81 
42 
32.15 
8.10 
10 
10 
57 
45.72 
0.76 
36 
30.5 
15.98 
12 
33 
47 
0.92 
0.57 
25 
47.9 
13.59 
13 
42 
19.98 
0.44 
21 
8.3 
12.12 
14 
33 
38 
8.83 
0.30 
t? 
16 
55.97 
13.16 
16 
it 
31 
5.41 
+ 0.0 
9 
54.24 
11.17 
17 
33 
28 
16.78 
—0.15 
7 
6.17 
14.01 
18 
33 
25 
55.54 
0.29 
4 
44.51 
10.74 
19 
24 
2.97 
0.41 
2 
51.80 
10.76 
20 
»3 
22 
41.49 
0.49 
1 
27.33 
13.67 
21 
21 
46.36 
0.52 
0 
31.15 
14.69 
22 
21 
8.11 
0.53 
0 
3.30 
4.28 
23 
33 
21 
11.99 
0.51 
0 
3.79 
it 
7-69 
24 
21 
41.09 
0.44 
0 
32.64 
8.01 
25 
33 
22 
51.85 
-0.36 
1 
29.78 
21.71 
28 
33 
28 
29.21 
+ 0.05 
33 
7 
10.84 
33 
33 
18.32 
Luni-solar nutation . 
Mean zenith distance of Tropic ofCapric. 
Mean zenith distance of Cancer from 
all preceding observation 
Half sum latitude of the observatory... 
10 21 12.718 
— 8.51 
10 21 4.20 
57 16 24.8 
33 48 44.5 
But by applying to the above zenith distance 10° 21' 4".20. 
the mean obliquity 23° 27' 43".l found with the mural, 
we obtain 33° 48' 47".4 for latitude. 
Remarks . — To avoid misconstruction, I remark, that the corrections for sun’s 
latitude, reduction to solstice, luni-solar nutation, and reductions to the com- 
mencement of the respective years, have always been applied with the signs 
adapted for finding the zenith distance of the mean tropic. Thus the cor- 
rection for the sun’s latitude is always applied with the opposite sign, and the 
luni-solar nutation in the southern solstice with the same sign, but in the 
northern solstice with the opposite sign, to what the solar tables give. 
