1 84 Dr. Maskelyne*s Obfervations on the Latitude 
Before the 24th of May, 1781, a 31-feet achromatic tele- 
fcope of Dollond, of 42 lines aperture, that was but an 
indifferent one, was made ufe of at the Royal Obfervatory at 
Paris. From that time a very good one was employed of the 
fame fize and aperture. 
Difference of meridians of the Royal Obfervatory of Green- 
wich and the Hotel de Clugny at Paris, 2 " of time Eaft of 
the Royal Obfervatory, deduced from obfervations of eclipfes 
of Jupiter’s firffc fatellite obferved at both places. 
By Imin 
erfions. 
Difference 
of 
meridians. 
Diff. of 
meridians 
corrected. 
Circumftances of 
the obfervations at 
Greenwich. 
Circumftances of 
the obfervations at 
Hotel de Clugny. 
3 775 * 
J iil y 
15 
/ 
9 
// 
55 
J 
9 
// 
55 
- 
Air very clear. 
Aug. 
7 
9 
6 
9 
*3 
6 F. 
Air very clear. 
1776, 
Sept. 
10 
9 
22 
9 
22 
Jupiter a 
Jittle hazy. 
1 777 > 
Sept. 
6 
9 
33 
9 
33 
— 
— 
Air very clear. 
Nov. 
7 
9 
23 
9 
23 
Air hazy 
• 
Air very clear. 
3 7 79 > 
Jan. 
1 1 
10 
18 
10 
25 
6 F. 
1 little hazy. 
Air very clear. 
18 
9 
23 
9 
30 
6 F. air 
Air very clear. 
Dec. 
22 
8 
10 
8 
10 
Air very 
clear. 
A little hazy. 
1780, 
Jan. 
7 
9 
39 
9 
39 
Air very 
clear. 
Air very clear. 
14 
9 
40 
9 
40 
Air very 
clear. 
Air very clear. 
Mar. 
18 
9 
2 
9 
2 
Air very 
clear. 
Air very clear. 
25 
9 
24 
9 
24 
1781, 
Feb. 
26 
8 
48 
8 
48 
’s limb undulates. 
Mar. 
5 
8 
59 
8 
59 
- 
— 
Air very clear. 
Apr. 
1.3 
9 
16 
9 
16 
- 
- 
Jupiter ill defined. 
July 
8 
9 
58 
9 
58 
- 
- 
Air very clear. 
1786, 
Sept. 
4 
9 
J 9 
9 
*9 
Air very 
clear. 
Dec. 
30 
9 
3 1 
9 
3 1 
Air very 
clear. 
Very hazy. 
Mean ofi8unm. 
9 
22,5 
9 23,7 
By 
