for determining the difference of meridians , &c. 119 
Actual Calculation and Results. 
Computation of the observations of the 18th. 
1st Combination. All the observers taken jointly. 
a k. - n 
TV -/ 
^ C' 
C" A 
7 " 
. “ r 
i 8 h i 5 m 4 o 5 -37 
18 35 41 -13 
18 45 44 -13 
io h 29 m 34 s -4 
10 49 32 -8 
10 59 33 -6 
9 h 54 m 52 s -o 
10 14 54-0 
9 h 4 6 m 2 9 *-75 
10 6 31 -40 
9 h 4 i m 46 s -2 
9 5 i 49 * 6 
10 1 50-3 
10 1 1 48 -6 
1021 46-9 
10 41 47 -2 
i7 h 26 m 46 s -25 
17 36 51 -02 
17 46 53-62 
17 56 53 -31 
18 6 53 -42 
18 26 57-05 
Mean. 
Mean. 
Mean. 
Mean. 
Mean. 
Mean. 
18 32 21-88 
10 46 13 • 6 
10 4 53-0 
9 5 6 30-57 
O 
00 
00 
1 7 53 32-44 
A — B — 
7 46 8 -28 
B - B'= 
+ 41 20-60 
Gain on M. T. of B — 0 -17 
B' — C' = 
0822 -43 
C'- C"= 
— II 57-56 
ofC— 0 -oo 
7 54 3 ° 7 i 
+ 29 23 -04 
C" — Z" — 
-7 45 4 - 3 i 
Gain of mean 
0n X A .8, 
Sid. Time 
. f — 4 
0 9 26 -40 
— 4-82 
— 0-17 
0 -co 
0921 -41 
= Corrected difference of Longitudes. 
Computation of the observations of the 19th. 
1st Combination. All the observers taken jointly. 
B 
i7 h zg m zg 3 '6 
9 " 39 m 3° s, 4 
18 39 52-5 
18 49 43-4 
10 49 41-1 
10 59 30-4 
Mean. 
18 19 41-83 
Mean. 
10 29 33 -93 
A — B = 
B'— C'— 
+ 7 5 ° 7 - 9 ° 
+ 8 16 -i 1 
II 
NJ 
s 
b 
+ 7 58 24-01 
—7 49 2-75 
9 21 -26 
+ 0-33 
— 0*02 
0 -oo 
O 9 21 -57 
_ _A 
c 
9 h 44 m 49 s "4 
9 54 49 *9 
10 34 49 - 7 
10 54 53 -4 
9 h 36 33 " IG 
9 46 36-65 
10 26 33 -70 
10 46 37-55 
Mean. 
Mean. 
10 1 7 20 -6o 
10 9 4-49 
B — B'= 
C'— C*= 
+ 12 13-33 
— 14 13-02 
Gain of mean 
Sid. T. - 
— 1 59 -69 
°. n } + 0-33 
C" 
Z" 
9 h 42 m o s, 45 
9 S 1 53‘ 6 5 
10 1 56-50 
10 22 2-45 
10 32 24-75 
10 41 59-80 
10 51 59-60 
11 2 3-40 
17 11 3o m 56 s, 55 
17 40 51 -34 
1 7 5 ° 55 '77 
18 11 5-09 
18 21 28-65 
18 31 5 -58 
18 41 
18 51 
711 
12 -50 
Mean. Mean. 
10 23 17-57 [18 12 20-32 
Gain of B on M. T. — 0-02 
of C o-oo 
“ Corrected difference of Longitudes. 
