Jor determining the difference of meridians ^ ^c. 123 



Calculation of the observations of the 18th. 

 sd Combination. Capt. Sabine (for Col. Bonne) — M. Largeteau. 



i\ f— 



18* i5'°40''37 

 35 41 -13 

 45 44 •»3 



Mean. 

 18 32 21 -88 



A — B = 

 B' — C'= 



c— z*= 



A = 



I o** 2 9"' 3 4s '4 

 49 32 -8 

 59 33 -6 



B' 



I — 



-A.- 



c 



9"54™52*'o 



Mean. 

 10 46 13 '6 



7 46 8 -28 



O 8 22 '20 



7 54 30 -48 

 -7 45 4 -41 



o 9 26 -07 



— 4-68 



— o -ai 



O '02 



o 9 21 •16 



Mean. 

 9 54 52 'o 



B — B' = 

 e— C-= 



9'» 46'n29**8 



Mean. 

 9 46 29 '8 



051 21 '6 

 -o 22 47 7 



Gain of mean on 

 Sid. T. 



o 28 33 -9 

 }=-4 68 



C" ,, 



9*'4i«n46s-4 



5» 49 V 

 10 21 46 '8 



41 47-2 



Mean. 

 10 9 17 '52 



> Z" 



i7»«26">46»*25 



36 51 -02 

 18 6 53 -42 



26 57 -05 



Mean. 

 17 54 21 -93 



Gainof BonM.T.r:— o '21 



of C - - — O '02 



The corrected difference of Longitudes. 



Calculation of the observations of the 19th. 

 3d Combination. Col. Bonne and M. Largeteau. 



A , 



i8*'39"52s-5 

 18 4^ 43 -4 



Mean. 

 18 44 47 -95 



A — B = 

 B' — C'= 



C — Z"=- 



N 



io'»49™4is o 

 10 59 30 -8 



Mean. 

 10 54 35 -90 



7 50 12 -05 

 8 16 -08 



7 58 28-13 

 7 49 2 *8o 



9 25-33 



— 378 

 + 0-04 



— o-oi 



B' 



9'*44"49^-4 



9 54 49*8 



10 34 49-8 



10 54 53-2 



Mean. 

 10 17 20 '55 



> C 



9*" 36'"33'*2 



9 46 33 -5 



10 26 33 '7 



10 46 37 -5 



Mean. 

 10 9 4-47 



B — B'= + o 37 15-35 

 C— C" = — o 14 13-05 



+ o 23 2-3 



Gain of mean 7 g 



on Sid. Time 3 ^ ' 



C" 

 9'' 42" 



9 51 

 10 I 

 10 22 

 10 32 

 10 41 



10 51 



11 2 



' 03-4 



53-5 

 56-6 



2*4 



247 



59-9 



59*4 



3-3 



Mean. 

 10 23 17 -52 



i7i'3o«'56g-55 



17 40 51 -34 



'7 50 55 77 



1 8 1 1 5 '09 



18 21 

 18 31 

 18 41 

 18 51 



28-65 

 5-58 

 7-11 



12 -50 



Mean. 

 18 12 20-32 



Gain of B on M.T. = + o 04 

 C - - — o-oi 



o 9 21 -58 ICorrected difference of Long 



itudes. 



