[ 3 « ] 
Obfervations for determining the Solflices. 
\pp. zen. dift. 
ftheQ’sV.L. 
App. zen. dift. 
of the Q’sL.L. 
Baro- 
meter. 
Thermo- 
meter. 
Hence the spp. 
zen. difh of the 
Sun's center. 
0 
/ 
// 
O 
/ 
n 
O 
/ 
n 
1770. 
Dec. 
9 - 
73 
2 1 
40-3 
*7 7 
/ 2 
5 + 
5 - 1 
29.76 
37 
73 
37 
52.7 
1 2. 
73 
3 6 
41 .8 
74 
9 
25.0 
29.78 
46 
73 
53 
3-4 
H- 
73 
44 
22.0 
74 
l6 
58.2 
29.87 
44 + 
74 
0 
40.1 
2 1. 
73 
41.0 
74 
29 
13. 1 
29-37 
43 + 
74 
1 2 
57.0 
22. 
73 
5 & 
20.0 
74 
29 
8.1 
29.94 
38I 
74 
I 2 
44.0 
29. 
73 
42 
27.2 
74 
*S 
04 
29.62 
73 
5 b 43.S 
1771. 
Jan. 
3 ■ 
73 
18 
18.0 
73 
5 1 
3 + 
29.23 
46 
73 
34 
40.8 
1771. 
June 
18. 
27 
5 
45*4 
2 7 
37 
42.2 
29.82 
64+ 
27 
21 
43-3 
19. 
2 7 
4 
52.7 
2 7 
3 6 
32.1 
30.03 
66f 
27 
20 
42-4 
20 
2 7 
3 
52.0 
27 
35 
44-4 
30. m 
7 * + 
2 7 
>9 
48.2 
21. 
2 7 
3 
33 + 
2 7 
35 
26.0 
30.12 
70 
27 
*9 
29.8 
22 . 
1*7 
3 
31.0 
2 7 
35 
29.4 
3 °- 1 1 
6 7 f 
27 
*9 
40.2 
"> 4 
T* 
I 27 
5 
17.1 
27 
37 
3-5 
30.06 
6 7 
27 
2 1 
10.3 
-y - „ 
2 7 
6 
43 ' 2 
27 
33 
32.0 
7 2 l 
27 
22 
37 6 
By comparing tbefe obfervations together, I make the J 0 ' 
true zenith dillance of the Sun’s center, at the >74 16 13.4 
Winter Solitice, to be J 
And at the Summer Solftice ......... 27 19 51.6 
Therefore, the difiance of the tropics 46 56 21.8 
Half 23 28 10.9 
By Mr. Mayet v s Tables, the decrement of the obli- ^ 
quity, tn three months, is j 
Hence the mean obliquity, December 21, 1770 . 23 28 11.0 
And June 21, 1771 23 28 10.8 
Therefore, the latitude of the ObfervatOry, by thefe'l ro , g 2 Ho _ th 
obfervations, is 1 5 ° 4 2 -4 •° 1 
The above obfervations were chiefly taken by Mr. Bradley. Thofe which 
follow are what I took about the time of the late oppofitions of the fuperior 
planets, in which, as well as the preceding obfervations, the apparent zenith 
diilances are thofe which were taken by the 96th arc, on which we chiefly 
depend, though the difference between the two arcs felJom arifes to more 
than three or four feconds. 
Fur 
