for determining the difference of meridians, &c. 

 Mr. Herschel's observations of the signals seen from Fairlight. 



S9 



Seventh Day, July 17, 1825. 



Remarks. 



Excessively faint but instantane 



[ous. 

 : : A mere suspicion. 



Well observed. 



Telescope put in focus by a *. 



Extr. faint, like a * of 10 m. 

 Exactly observed. 

 Very distinct ; perfectly well ob- 

 [served 

 : : A pretty strong suspicion. 



The second doubtful, owing to 

 the lateness of the explosion. 



: : : A faint suspicion. 



No. 

 I 



2 



3 



4 



5 

 6 



7 



8 



Tenth Day, July 20, 1825. 



La Canche 

 Wrotham 

 La Canche 

 Wrotham 

 La Canche 

 Wrotham 

 La Canche 

 Wrotham 

 La Canche 

 Wrotham 

 La Canche 

 Wrotham 

 La Canche 

 Wrotham 

 La Canehe 



Wrotham 



La Canche 

 Wrotham 



La Canche 

 Wrotham 



9 3' 43'3^^ 



9 36 36-2 



9 41 58-0 



9 4^ 37-9 



9 51 56-0 



10 I 567 

 10 6 44*1 

 10 1 1 57-9 



Remarks. 



Single flash. 



Single p. bright flash. 

 Single flash ; train not seen. 



10 22 4*4 



10 31 58-1 



10 41 58-0 



10 51 58-0 



II 1 58-5 



! 



A second fired, but both were 

 bad signals. Observation of 

 little value. 



Large flash ; some seconds after 

 a small faint one. 



MDCCCXXVI. 



N 



