for determining the difference of meridians , &c. 
101 
July 20. The rockets this evening were miserably bad ; 
five only were observed ; the eighth however might have 
been a good one ; it was lost by all the observers looking 
for it too late. 
Rockets. 
App 1 Time I. 
- - 
- II. 
- - - III. 
Mean. 
1 
9 h 32“ 36.6 s 
36.7 s 
36.9s 
36.73 s 
2 
— 
— 
3 
A. 
52 56.2 
- 
- 56.0 
- - 56.1 
56.1 
T 
S 
— 
10 12 39.2 
39 - 2 
6 
10 22 45.7 
- 
00 
1 
- 22 46.1 
45.87 
7 
8 
10 32 53.0 
- - 53-i 
S 3-°5 
9 
— 
xo 
— 
— 
Comparisons of Chronometer and Clock. 
Chronometer. 
Clock. 
Before 9 h 6 m 
i6 h 58" 1 53.06s 
After ii 10 
*9 
3 » 3-34 
i5 h 40“ 
47.22s 
Mean Error and Rate of Sidereal Clock. 
Mean of 5 * s I Mean error. 1 Mean rate 
• 0.03s 
Comparison from 19th to 20th, •+• 0.35 
Chronometer fast i ra 16.61 s 
