for determining the difference of meridians ^ &c. 



Calculation of the observations of the i8th. 

 2d Combination. Capt. Sabine. Mr. Herschel. 



i»i 



A , '' 



i8*i5™4os'37 



35 4»-i3 

 45 44 '^3 



, B 



Io'*2 9ni34S'4 



49 32 '8 

 59 33-6 



Mean =: 

 18 32 21 -88 



A — B = 

 B'— C'= 



C*— Z" = 



Mean = 

 10 46 13 '6 



9 26 -39 

 —4-82 

 — 0-17 

 •01 



B' 



9'' 54™ 52' 

 10 14 54 



Mean = 

 10 4 53 



C 



9'i46'n29'-7 

 10 6 31 '4 



Mean — 

 9 56 30-55 



B - B' = -f 



C — C'=: — 



(B — B') + (C'-C")=: 



Gain of mean 7 g 



iSid.Timej-~4"a2 



C 

 9''4i'n46s-o 



51 49-5 



10 1 50 '3 



II 48.6 



21 47 .0 



41. 47 '2 



Mean = 

 10 8 28 -1 



Z" 



I ^h 26ni 469-25 



18 



36 

 46 



56 



6 

 26 



51 -02 

 53-62 



S3 '3^ 

 53 '42 

 57-05 



Mean = . . 

 17 53 32*44 



41 20 -60 Gain on M.T.-o- 1 7 

 *^ 57 -SSGainonM-T.-o-oi 



29 23 -05 



o 9 21 -39 z: The corrected difference of Longitudes 



Calculation of the observations of the 19th. 



2nd Combination. Observations of Capt. Sabine and 

 Mr. Herschel. 



MDCCCXXVI. 



R 



