\i 6 z Dr. Maskelyne’s Obfervations on the Latitude 
Apparent zenith diftances of the pole ob- 
ferved with the iron quadrant. 
1753 
Apparent zenith 
diftance of the 
pole. 
Barom. 
Thermom. 
in. 
out. 
O / // 
Inches. 
O 
O 
Sept. 13 
38 30 40,1 
30,10 
64 
6 5 
O O 
4 I >5 
29,88 
61 
60 
0£l. 2 
42,5 
29,67 
56 
53 
5 
41,0 
30,02 
57 
57 
1 1 
4 M 
29,48 
61 
57 
40,2 
29,82 
50 
43 
3 1 
4.0,8 
29,63 
42 
34 
Nov. 5 
42,1 
29,69 
45 
39 
16 
40,5 
2 9’39 
42 
35 
19 
42,2 
29,59 
40. 
35 
20 
40,9 
29,84 
40 
0 0 
00 
24 
40.0 
30,00 
43 
35 
29 
40,0 
29,80 
38 
3 ° 
Dec. 3 
39*3 
30,16 
39 
33 
8 
37,4 
30,06 
35 
27 
17 
4 CS 
29,50 
' 5o 
49 
3 ° 
38,° 
3 °, 11 
33 
22 
Mean 
33 3 ° 40,5 
29,81 
47 
4*1 
Refra&ion 
+ 4 6,4 
Col. 
- 8,4 
Pol. corr. 
38 3 i 18,5 • 
t 
So far the manufcript. 
Thus the latitude by the brafs quadrant being 51 0 28' 38 y/ f, 
and by the iron quadrant with new divifions 51 0 2 S'' 41 "l, 
the mean by both quadrants is 51° 28' 40", or only half a 
fecond greater than fettled in another manner, according to 
the manufcript of Dr. Bradley in my pofleffion. Alfo the 
apparent zenith diftance of the pole with the mean refradliou 
45", 4 being 38° 30' 36 7/ ,i by the brafs quadrant, and 
38° 30 / 33 // » 1, by the iron quadrant, the mean by both is 
