1 6 
Lieutenant Foster's account of 
Observations of Coincidences at Greenwich — continued. 
Height above the level of the sea 181,5 feet. 
P. M. 2 1 st April, Royal Observatory. 
Clock losing at a mean rate 3 s . 29. 
• 
Temp. 
Time of 
Disappear- 
ance. 
Time of 
Re-appear- 
ance. 
Mean of Dis- 
appearance 
and Re-ap- 
pearance. 
Arc of 
vibra- 
tion. 
Mean 
Arc. 
Interval in se- 
conds of Clock. 
Observed vibrations in 24 h. 
Correct, 
for Arc. 
Observed vibra. ccrr. 
Disappearance. 
Disappearance 
and Re-ap. 
Disappearance. 
Disap 
and 
Disap. 
Disap. & 
Re-ap. 
O 
h. m. s. 
in. s. 
111. s. 
O 
O 
s. 
s. 
5 8 >5 
I 31 17 
3* 23 
31 20 
1.22 
1. 180 
692 
691,5 
2.278 
« • • • c , 
V ■ 
42 49 
42 54 
42 5‘>5 
1. 1 4 
I. IOO 
693 
693 
I.978 
, f 
54 22 
54 27 
54 24,5 
1.06 
I.O25 
6 93 
6 93/5 
1. 719 
• * 
2 5 55 
6 1 
5 5 8 
0.99 
O.955 
692 
694 
I.492 
. , 
17 27 
17 37 
17 32 
0.92 
O.885 
696 
695 
I.281 
, , 
29 3 
29 1 1 
29 7 
0.85 
0.825 
694 
694 
I-U 3 
• • 
4 ° 37 
40 45 
40 41 
0.80 
O.775 
695 
695,5 
0.982 
, , 
52 12 
52 21 
52 16,5 
°*75 
O.725 
693 
694,5 
O.860 
• • 
3 3 45 
3 57 
3 51 
0.70 
0.675 
695 
695 
O.746 
59>9 
15 20 
1 5 32 
15 26 
0.65 
59 , 2 
Mean. 
693,67 
694 
86147,61 
86147,73 
I.38 
86148,99 
86 
A , M. 22(1 April 1824, Royal Observatory. 
Remoter f Beginning 29,81 } g 
Clock losing at a mean rate 3 s . 29. 
(Ending.. 29,84) 
54,5 
8 48 32 
4 8 37 
4 8 34,5 
1.20 
1. 160 
696 
696 
2.200 
9 00 8 
00 13 
00 10,5 
1. 12 
I.080 
696 
697 
I.908 
• . 
11 44 
11 5 1 
n 47>5 
1.04 
I.005 
698 
698 

I.652 
. • 
23 22 
23 29 
23 25,5 
0.97 
O.940 
698 
696,5 
I.446 
.. 
35 00 
35 4 
35 2 
0.91 
0.875 
696 
698 
I.252 
. . 
46 36 
46 44 
46 40 
0.84 
0.810 
696 
697 
I.O73 
. , 
58 12 
58 22 
5 8 i 7 
0.78 
°-755 
696 
696 
O.93I 
.. 
10 9 48 
9 5 8 
9 53 
o -73 
0705 
697 
697/5 
0.812 
. • 
21 25 
21 36 
21 20,5 
0.68 
0.655 
698 
697 
O.702 
• • 
58,8 
33 3 
33 12 
33 7/5 
0.63 
56,6 
/lean. 
696,78 
697 
86148,72 
86148,80 
i -33 
86150,05 
861 
