for determining the difference of meridians , &c, 
97 
July 1 6. The third rocket disappeared without explosion. 
Rockets. 
App‘ Time. I. 
II. 
- III. 
Mean. 
1 
9 h 32“ 17.0 s 
- - 16.9 s 
- - 16.9 s 
16.93 s 
2 
3 
42 15.6 
- - 15.6 
- - 15-4 
15-53 
4 
10 2 16.8 
- - 17.2 
- - 17.1 
17.03 
5 
12 16.4 
- - 16.3 
- - 16.5 
16.40 
6 
22 18.0 
- - 17-9 
- - 18.3 
18.07 
7 
32 H -9 
- - 14.8 
- - 15.1 
> 4-93 
8 
42 21.0 
- - 21.0 
- - 21.0 
21.0 
9 
52 15.8 
- - 15.2 
ft 
I 
1 
* 5-47 
10 
11 2 15.2 
- - 15.1 
- - I 5-5 
15.27 
Comparison of Chronometer and Clock. 
Chronometer. 
Before 9 h i8 m 
After n 12 
Clock. 
i6 h 55“ 5.29 s 
18 49 24.06 
Mean Error and Rate of Sidereal Clock. 
Mean of 5 * s 
1 6.6 
Mean error corresponding. 
47.60 s 
Mean rate. 
— o -3 3 s 
Comparison from 15th to 16th — 0.31. 
Chronometer fast i m 20.40 s . 
MDCCCXXV 1 . 
o 
