290 
Mr. Henderson on the difference of meridians 
19th 
18th 
2. Fairlight Chronometer. 
17 th 
From July 17 to July 18. 
h. m. s. h. m. 3. 
17 12 38-06 9 31 36-15 
17 22 39-55 9 41 35-90 
17 32 42-39 9 51 37-10 
17 42 44-31 IO I 37-50 
17 52 4398 IO II 35-65 
18 2 49-09 IO 21 38*85 
l8 12 52-67 IO 31 40-85 
l8 22 54-52 IO 41 40-95 
18 42 55-39 II I 38-55 
Mean 
17th G = 17 53 53-33 
1 8th G'= 17 53 32-40 
G' — G — 23 59 39-07 F'-F= 23 55 43-52 
(G'-G)-. (F'— F) “ 3 m 55 s '55 
34“ X 3 m 55 8 *55 
= r' ~ 3 m 56’-25. 
23" 55 43 52 
From July 18 to July 19. 
h. in. s. 
G' = 18 12 20-31 
G = 17 53 3 2 ‘4° 
b, m. s. 
F' = 10 23 17-57 
F = 10 8 28-13 
G* — G = 24 18 47-91 F'-F= 24 14 49-44 
(O' — G) — (F / — F) = 3 m 5 8-- 4 7 
2 4 h X 3 m 58 s -47 _ r / _ .m . & . 0 . 
24“ i 4 m 4 9 9 -44 
From July 19 to July 20. 
Mean 
F — 10 12 44-61 
F':= 10 8 28-13 
20th 
b. 
m. s. 
b. 
m, 
s. 
18 
4 55-93 
IO 
1 1 
57*85 
18 
15 4-26 
10 
22 
4*45 
Mean. 
Mean. 
20th 
G' 
= 18 
10 o-io 
P = 
10 
17 
1-15 
19th 
G 
= 18 
12 20-31 
P = 
IO 
23 
> 7*57 
G' — - 
G : 
= 23 
57 3979 F' 
-F = 
23 
53 
43"58 
(G' 
— G) 
-(F'- 
F) 
3 ” 
-56 
» a • 2 1 
24 h 
23 1 
X 3 “ 
1 53 ra 
5 6 s -2 1 
43 s> 5 8 
: r ' 
= 3 m 
57-25. 
From July 20 
to 
July 21. 
h. 
m. s. 
h. 
m. 
S. 
21 St 
G' 
= *7 
38 57*12 
F' = 
9 
42 
7-65 
20th 
G 
= 18 
IO O-IO 
F = 
IO 
17 
i ' i § 
G'- 
-G 
= 23 
28 57-02 
F'- 
■F = 
23 
25 
6-50 
(G' 
’ — G) 
— ’ (F' — 
F) 
= 3 “ 
56 
’•52 
24 11 
23 
X 3 m 5 °'' 5 Z _ 
h 25™ 6 8, 50 
: r 
= 3 ” 
56' 
-25, 
From July 21 
to July 22. 
h. 
m. s 0 
h. 
m. 
s. 
zzd 
G' 
= 17 
47 55 -6 4 
F' = 
9 
47 
8-59 
21st 
G 
= 17 
38 57-12 
F = 
9 
42 
7-65 
G- 
- G 
= 2 + 
8 58-52 F'- 
- F = 
24 
5 
°'94 
(G' — G ) — (P — F) = 3“ 57 s - 5 8 
2 4 h X 3 m 57 ‘ 5 8 
24 h 5 " 
o 94 
r' — 3 m 56’-76. 
Collecting together the rates of the chronometers, we have 
Lignieres Chronometer. 
From July 18th to July 19th - - 
r 
4“ 23*38 
From July 17th to July 18th - 
- 3 " 
r 
56 s, 25 
1 9th 20th - - 
4 0-36 
18th 
I 9th - 
- 3 
56 -04 
20th 2 1st - - 
3 5 7 7 ° 
19th 
20th - 
- 3 s 
57-25 
21st 22d - - 
3 57 * 5 6 ' 
20lh 
2 1 St 
- 3 
56 -25 
2 I St 
2 2(1 
- 3 
5676 
Fairlight Chronometer. 
