for determining the difference of meridians , ^c. 

 Colonel Bonne's observations of signals seen from Lignieres. 



87 



Observations du 21 Juillet, le 11"= jour. 



I 



2 



3 



4 



5 

 6 



7 



8 

 9 



10 



Apparition des Signaux, 

 en terns de la montre. 



i I'Orient. 



h. min. sec. 



9 39 24>6 

 9 49 32>6 



10 09 38,8 



10 59 33*4 



i I'Occident. 



Remarqnes. 



h. min. sec. 



9 34 50,8 

 JO 04 53,0 



10 34 49,6 



10 44 59,4 



11 04 51,6 



IV. Observations of the signals at the Fairlight Station, by Mr. Herschel. 



By Baker's Chronometer, No. 744. Going M. T. beating half seconds. 



First Day's Observations, July 11, 1825. 



No. 

 I 



10 



La Canche 

 Wrotham 



La Canche 

 Wrotham 



La Canche 

 Wrotham 



La Canche 

 Wrotham 



La Canche 

 Wrotham 



La Canche 

 Wrotham 



La Canche 

 Wrotham 



La Canche 

 Wrotham 



La Canche 

 Wrotham 



La Canche 

 Wrotham 



9 41 7*6 



9 51 3-5 



9 56 23-2 



10 r 4*8 



10 5 59-2 

 10 II 3'o 



10 21 4*4 



«o 31 47 



10 36 15-8 



9 41 6-3 



10 46 I2'4 



10 51 3'3 



II I 8*2 



Remarks. 



Seen, but the time not seized cor- 

 [rectly. 



The train began at 9^4i'"2*. • 



Train began at 9'' 20" 59*'5. 



Seen by the gunners with naked eye 

 Very good. 



Faint and indistinct. Seen by the 

 Precise. [gunners. 



Train began at 59*.o. 



Train began at 58'*5. 



Very faint. Not seen by the men. 



Seen by the men. 



Second Day's Observations, July 12, 1825. 



No. 

 I 



10 



La Canche 

 Wrotham 



La Canche 

 Wrotham 



La Canche 

 Wrotham 



La Canche 

 Wrotham 



La Canche 

 Wrotham 



La Canche 

 Wrotham 



La Canche 

 Wrotham 



La Canche 

 Wrotham 



La Canche 

 Wrotham 



La Canche 

 Wrotham 



9 26 

 9 36 



9 36 

 9 4» 



24-5 

 7-3 



23-3 



7'5 



9 56 



ID I 



10 6 

 10 II 



10 16 

 10 21 



10 26 



ID 31 



10 36 

 10 41 



10 46 

 10 51 



10 56 



11 I 



17-8 

 8-8 



317 

 9-2 



23*6 



lO-Q 

 22 5 



8-0 



21-9 

 8-1 



i6-5 

 5 '4 



16-4 

 6-6 



■ Remarks. 



Not the true explosion according 

 [to M. Largeteau 

 Very bright and sharp. 



Lost by looking the wrong way. 



Distinct. 



Sharp and bright. 



Extremely faint. Do\}l)tful. 

 Bright. 



Distinct. 

 Bright. 



Seen by Mr. Gilbert with naked 

 Bright. [eye. 



Train began at i*. 



? 1 5 '.5. The decimal correct. 

 Train began at o'.5. 



Very bright. Train seen 4 or 5'. 

 Train began at o'.5. 



