122 



Mr. Herschel's account of a series of observations 



Calculation of the observations of the 21st. 



2d Combination. Observations of Capt. Sabine and 



Mr. Herschel. 



A , — - 



17 47 32-10 



17 7 40*95 



18 17 30*30 



»8 37 4075 

 18 57 43 -90 



Mean. 

 18 14 15 '18 



A — B = 

 B'— C' = 



C' — Z'z: 



i39™24''-8 

 49 32-8 

 38-4 



10 19 26*4 



»0 39 33 -2 



10 59 33-2 



Mean. 

 10 16 II '47 



7 58 3 7» 

 8 II 36 



8 6 1 5 -07 

 -7 56 48 -40 



9 26 67 

 — 4'54 



O'OI 



+ 0-03 



o 9 22 '15 



B' 



9" 54'"5o''-4 

 10 4 53-2 



10 14 51 '2 

 10 34 49-6 

 10 44 59-4 



u 4 52 'o 



Mean. 

 10 26 32 '63 



B — B' = 



C — C"= 



9^ 46'°398'o 



9 56 41 '5 

 10 6 39 -8 

 lo 26 38 '3 



10 36 47 '9 



10 56 41 •! 



Mean. 



ID 18 21 '27 



— o 10 21 '16 

 +0 36 13 'S7 



+ 25 

 Gain of mean on 7 

 Sid. T. - j - 



52-41 

 4*54 



C" r— 

 9'' 42° 7^7 



Mean. 

 9 42 77 



i7>»38'"56*-io 



Mean. 

 17 38 56-10 



Gain of B on meanT. — o -o i 

 ofC - - +o- 3 



Corrected difference of Longitudes. 



Calculation of the observations of the 22d. 



2d Combination. Observations of Capt. Sabine and 

 Mr. Herschel. 



17*31n>I2*-I5 



17 51 18 -70 



18 I 15 -65 



18 II 21 -70 

 18 21 43 -60 



18 31 31 -So 



Mean. 

 »8 4 43 -93 



A — B = 

 B'— C = 



C-Z" = 



^ B 



9'»29'°i8s 6 



9 49 22 -o 

 9 59 «7 -2 



10 9 32 -O 



10 19 41 -6 

 10 29 28-6 



Mean. 

 10 2 45 -00 



9 22 '84 



I -22 



— o -03 

 + o -03 



O 9 21 '62 



B' 



9»'44"5o^-8 

 9 54 53 -6 

 10 4 53 -2 

 10 15 8 -8 

 10 24 48 '4 

 10 34 58 '8 

 10 44 57 -6 



10 54 48 -o 



11 4 48 -8 



Mean. 

 10 24 54 -22 



B — B' =z 

 C— C" = 



C 



9h 36"39'-8 



9 46 42 -5 



9 56 42 -5 



10 6 58 -o 



10 16 37-3 



10 26 48 -2 



10 36 47 -o 



10 46 36-9 



10 56 38 -o 



Mean. 

 10 16 43 •36 



— 22 9-2 



+ 29 34 7 



+ 7 25 -5 

 Gain on Sid. T. — i -22 



9" 32'" 9»-o 



9 42 7 -o 



9 52 8*6 



10 2 10 'I 



Mean. 

 9 47 8-67 



•7''32'"53"*27 

 17 42 53 .36 



17 52 56 -56 



18 2 59 -28 



Mean. 

 17 47 55 -62 



Gain of B on M. T. — 0*03 

 of C - - + o-oj 



= Corrected difference of Longitudes. 



