18 
Lieutenant Foster’s account of 
Observations of Coincidences at Greenwich — continued. 
Height above the level of the sea 181,5 feet. 
P. M. 23d April 1824, Royal Observatory. 
Clock losing at a mean rate 3 s . 29. 
Barometer = 29,145 mean. 
Temp. 
Time of 
Disappear- 
ance. 
Time of 
Re-appear- 
ance. 
Mean of Dis- 
appearance 
and Re-ap- 
pearance. 
Arc of 
vibra- 
tion. 
O 
h. 
m. 
s. 
m. 
S. 
m. 
S. 
O 
52,5 
1 
2 5 
29 
25 
3 i 
25 
3 ° 
1.22 
37 
7 
37 
1 1 
37 
9 
1.14 
48 
47 
48 
5 1 
48 
49 
I.06 
2 
00 
26 
00 
3 1 
00 
28,5 
°-99 
12 
5 
12 
13 
12 
9 
0.94 
23 
45 
23 
54 
23 
49»5 
0.88 
35 
26 
35 
34 
35 
3 ° 
0.82 
47 
8 
47 
18 
47 
l 3 
0.76 
58 
5 ° 
58 
59 
58 
54>5 
0.70 
53 > 2 
3 
10 
3 i 
10 
4 1 
10 
36 
0.65 
52,8 
Mean 
• 
A. M. 
24th April 
1824, 
Royal Observato 
Clock 
osing 
at a 
mean 
rate t 
3 . 29 . 
505 
8 
4 i 
56 
42 
1 
4 1 
58,5 
1. 16 
53 
36 
53 
4 1 
53 
38,5 
1.07 
9 
5 
16 
5 
21 
5 
18,5 
0.98 
16 
56 
i 7 
3 
16 
59>5 
0.92 
28 
36 
28 
45 
28 
4 -o ,5 
0.85 
40 
l 7 
40 
2 5 
40 
21 
0.79 
5 i 
57 
52 
7 
52 
2 
0.74 
10 
3 
38 
3 
47 
3 
42,5 
0.69 
15 
! 9 
15 
29 
!5 
24 
0.64^ 
54>5 
26 
58 
27 
1 1 
27 
4>5 
0.60 
Mean 
Arc. 
1. 1 80 
I. IOO 
I.025 
0.965 
O.9IO 
0.850 
0,790 
0.73° 
0.675 
Interval in se- 
conds of Clock. 
Disap. 
s. 
698 
700 
699 
699 
700 
701 
702 
702 
701 
700,22 
Disap. & 
Re-ap. 
s. 
699 
700 
699.5 
700.5 
700,5 
700.5 
7°3 
701.5 
7 OI >5 
700,67 
Observed vibrations in 24 h. 
Disappearance. 
86149,94 
Disappearance 
and Re ap. 
86150,10 
Correct, 
for Arc. 
Disappearance. 
vib. 
2.278 
I.978 
I.719 
I.524 
1 *354 
1 . 1 8 1 
X.021 
0.872 
0.746 
1.41 
Vibra. in 24 h. corr. for Arc. 
Disappearance 
and Re-app, 
86151,35 
86151,51 
Barometer I ^ e S'. nn i n § 2 9>86 ? 29,00 mean. 
| Ending... 29,94 j 
53 >° 
1.115 
1.025 
0.950 
0.885 
0.82 o 
0.765 
0.715 
0.665 
0.620 
700 
700 
700 
700 
701 
700 
701 
701 
699 
700,22 
700 
700 
701 
701 
700,5 
701 
700,5 
7 OI >5 
7 ° °,S 
700,67 
86149,94 
86150,10 
2.033 
I-7I9 
1.476 
1.281 
I. IOO 
0.956 
0.835 
0.724 
0.629 
1. 19 
86151,13 
86151,29 
Mean. 
