122 Mr. Herschei/s account of a series of observations 
Calculation of the observations of the 21st. 
2d Combination. Observations of Capt. Sabine and 
Mr. Herschel. 
A v R 
■R' A 
r 
i 7 h 37 m 23 s ‘io 
17 47 32-10 
17 7 40-95 
18 17 30-30 
18 37 4°'75 
18 57 43 - 9 o 
9 h 3 g m 24 s - 8 
9 49 32 -8 
10 9 38 -4 
10 19 26-4 
10 39 33 -2 
IO 59 33 -2 
h ~ 
9 h 54 m 5° s -4 
io 4 53 -2 
IO I45I *2 
10 34 49-6 
10 44 59 - 4 
11 452-0 
i v - 
9 h 46™ 3 9 s -o 
9 5 6 4 1 ‘5 
10 6 39 -8 
10 26 38 -3 
10 36 47 -9 
10 56 41 -i 
^ r ~ — 
9 h 42“ 7 S ‘7 
i7 h 38 m 56 9 -io 
Mean. 
Mean. 
Mean. 
Mean. 
Mean. 
Mean. 
18 14 15-18 
10 16 11 -47 
10 26 32 -63 
10 18 21 -27 
9 42 7-7 
17 38 56-10 
A — B - 
7 5 8 3 - 7 i 
B — B' = 
— 0 10 21 -16 
Gain of B on meanT. — o -o I 
B'— C' — 
8 11-36 
C' — C "= 
+ 0 36 13 -57 
of C - 
- +o- 3 
O 
SB 
t 
N 
if 
8 6 15 -07 
-7 5 6 4 8 '40 
9 26 67 
— 4’54 
— 0 -oi 
+ 0-03 
0 9 22 -15 
Gain of mean 
Sid. T. - 
Corrected diffe 
+ 0 25 52 -41 
on 7 
} — 4*54 
■rence of Longit 
udes. 
Calculation of the observations of the 22d. 
2d Combination. Observations of Capt. Sabine and 
Mr. Herschel. 

B 
17" 3i”>i2 9 -i5 
17 51 18 70 
18 1 15 -65 
18 11 21 70 
18 21 43 -6o 
18 31 31 -8o 
Mean. 
18 4 43 '93 
A — B = 
B' — C — 
C"-Z"~ 
9 h 29 m i 8« 6 
9 49 22 ‘O 
9 59 17 -2 
10 9 22 -o 
10 19 41 -6 
10 29 28-6 
Mean. 
to 2 45 *oo 
1 58 -93 
8 10 ’86 
8 10 9 79 
8 o 46 -95 
9 22 ‘84 
— 1 ‘22 
— O ‘03 
+ O -03 
B' , A 
9 h 44 ra 5 o s -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 
^ C' 
9 h 3 6m 39 s ' 8 
9 4 6 42 -5 
9 5 6 42 *5 
10 6 58 -o 
10 16 37 -3 
IO 26 48 -2 
10 36 47 -o 
10 46 36-9 
IO 56 38 -o 
Mean. 
Mean. 
10 24 54 -22 
10 16 43 -36 
B — B' - 
— 22 9-2 
C 1 — C " = 
+ 29 34 1 
+ 7 25 -5 
| Gain on Sid. 
T. I -22 
9 21 ‘62 
C" 
gh , 2 m QS.Q 
9 42 7 • o 
9 52 8*6 
10 2 10 -i 
Mean. 
9 47 8-67 
Z" 
i7«32‘“53 8 -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 - - + 0-03 
= Corrected difference of Longitudes. 
