124 Mr. Herschel's account of a series of observations 



Calculation of the observations of the 21st. 



3d Combination. Observations of Col. Bonne and 



M. Largeteau. 



A 



i7*'37°'23S'io 



17 47 32 'lO 



18 7 40-95 

 18 57 43 '90 



Mean. 

 18 7 35 -oi 



A — B=: 

 B'~C'= 



C— Z" = 



B 



9'» 39"'24S'6 



9 49 32 -6 



10 9 38 -8 



10 59 33 -4 



Mean. 

 10 9 32 '35 



7 58 2 '66 

 8 1 1 -45 



8 6 14 '11 



-7 56 48 -40 



9 25 '71 



-3 iS 



— o '04 

 +0 -04 



o 9 22 '57 



B' , 



io''34™49S'6 

 10 44 59 -4 



Mean. 

 10 39 54-50 



B- B' = 



C- C" = 



I0''26"'38s-2 



10 36 47 '9 



Mean. 

 10 31 43 -05 



— 30 22 '2 



+ 49 35 -3 



+ 19 13 I 

 Gain of mean on i 

 Sid. T. - - > 



3 -15 



C" 

 9'>42>7 



TJ' 



i7''38"s6'"io 



Mean. 

 9 42 7 7 



Mean. 

 17 38 56-10 



Gain of B on meanT.— o -04 

 of C - - + o -04 



'OSDfiSTo'-fl'h ' 



Corrected diflference of Longitudes. 



Calculation of the observations of the ssd. 

 sd. Combination. Col. Bonne and M. Largeteau. 



