for determining the difference of meridians , &c. 
Mr. Herschel's observations of the signals seen from Fairlight. 
89 
Seventh Day, July 17, 1825. 
No. 
h. m. s. 
La Canche 
9 26 20-6 
Wrotham 
9 3 » 36-3 
La Canche 
9 36 20-5 
Wrotham 
9 4 1 35'9 
3 
La Canche 
9 46 27-0 
Wrotham 
9 5 1 37’2 
La Canche 
9 56 28-0 
4 
Wrotham 
10 1 37-6 
5 
La Canche 
10 6 28*2 
Wrotham 
10 11 357 
6 
La Canche 
IO l6 2 Q 7 
Wrotham 
IO 21 38-9 
7 
La Canche 
10 26 27-8 
Wrotham 
10 31 41-0 
8 
La Canche 
10 36 24-5 
Wrotham 
10 41 41*1 
9 
La Canche 
10 46 38-5 
Wrotham 
10 51 317 
La Canche 
IO 36 20-2 
Wrotham 
II I 387 
Remarks. 
Excessively faint but instantane- 
ous. 
[served. 
: A pretty strong suspicion. 
rhe second doubtful, owing to 
the lateness of the explosion. 
: : A faint suspicion. 
Eighth Day, July 18, 18Z5. 
No. 
h. in. sec. 
La Canche 
Remarks. 
Wrotham 
9 3 1 4 1 ‘9 
Good. 
La Canche 
9 36 3°‘9 
Good. 
Wrotham 
9 41 46-0 
Good. 
La Canche 
9 46 297 
Good. 
J 
Wrotham 
9 5 1 49'5 
Good. 
La Canche 
9 5 6 3 2 '8 
Good. 
Wrotham 
10 1 50-3 
Good. 
5 
6 
La Canche 
10 6 31-4 
Good. 
Wrotham 
La Canche 
10 11 48-6 
10 16 327 
Good. Uncommonly bright. 
Good. 
Wrotham 
10 21 47-0 
Good. 
7 
8 
La Canche 
Wrotham 
La Canche 
10 26 23-4 
10 31 42^8 
Unexpected ; possibly i s wrong. 
Good. 
Wrotham 
10 41 47-2 
La Canche 
10 46 27-0 
: : 111 observed. 
y 
Wrotham 
10 51 43-1 
10 
La Canche 
Wrotham 
ic 56 24-9 
1 1 1 420 
Perfectly well observed. 
Ninth Day, July 19, 1825. 
No. 
La Canche 
h. m. s. 
Remarks. 
1 
9 26 31-3 
or 34*3 > certainly one or the other. 
Wrotham 
9 3 i 5 i -5 
Very brilliant. 
2 
La Canche 
9 3 6 33 0 
Very bright; well observed. 
3 
4 
5 
Wrotham 
La Canche 
Wrotham 
La Canche 
Wrotham 
La Canche 
9 4 2 °'S 
9 4 6 33 -8 
9 5 1 53-8 
9 56 29-1 
10 1 56-4 
Remained extremely long in the 
air, & mounted to a vast height. 
Missed by looking into the wrong 
telescope by mistake. 
Wrotham 
10 11 51*1 
Burst without rising. 
6 
La Canche 
10 16 32-2 
Train seen before the flash. 
(Two rockets fired. The first 
Wrotham 
10 22 27 
< burst, the second observed as 
( here set down. 
7 
La Canche 
Wrotham 
10 26 337 
10 32 24 8 
Train seen as well as flash. 
8 
La Canche 
10 36 33-0 
Extremely faint; the train as 
bright as the flash. 
Wrotham 
10 41 597 
Very bright. 
Q 
La Canche 
10 46 37-6 
Train seen. 
y 
Wrotham 
10 3 1 i;g-8 
Mounted to an immense height. 
10 
La Canche 
10 56 29-5 
The first flash at lighting ob- 
served; a second flash a long 
while after, seen, but time not 
taken. 
Wrotham 
II 1 51*0 
2 3‘5 
First flash, rocket burst. 
Second rocket, rose regularly. 
Tenth Day, July 20, 1825. 
No. 
1 
h. m. 8. 
La Canche 
Wrotham 
9 3 1 43*3 
La Canche 
9 3 6 3 6 ' 2 
Wrotham 
9 41 58-0 
La Canche 
9 4 6 37'9 
Wrotham 
9 51 56-0 
La Canche 
Wrotham 
10 1 567 
La Canche 
10 6 44- 1 
Wrotham 
10 11 57-9 
La Canche 
Wrotham 
10 22 4-4 
La Canche 
Wrotham 
10 31 58M 
La Canehe 
Wrotham 
10 41 58-0 
La Canche 
Wrotham 
10 51 58’o 
La Canche 
Wrotham 
li 1 58-5 
Remarks. 
Single flash. 
Single flash; train not seen. 
A second fired, but both were 
bad signals. Observation of 
little value. 
a small faint one. 
MDCCCXXVI. 
N 
