in the length of the pendulum vibrating seconds 
445 
Observations of Coincidences. 
1818, June 13, A. M. at Mr. Browne's house, Portland- 
place, London. Barometer 29,9 inches, clock gaining i*,5 
in a mean solar day. 
Temp. 
Time of coin- 
cidence. 
Arc 
of vibra- 
tion. 
Mean 
Arc. 
Interval 
in 
seconds. 
No. of 
vibrations. 
Observed 
Vibrations 
in 24 hours. 
Correc- 
tion for 
Arc. 
Vibrations 
in 24 hours. 
71,2 
h. m. s. 
10. 5. 9 
13.18 
21.28 
29.39 
37-4 l> 
46. 0 
54.11 
11 : 2.21 
10.34 
19.44 
26.56 
O 
1,3S 
1,33 
1,27 
1,23 
1,17 
1,13 
1,08 
1,03 
0,98 
0,95 
0,92 
O 
1.35 
1,30 
1,25 
1,20 
1,15 
1,10 
1 ,05 
1,00 
0.96 
4S9 
490 
491 
490 
491 
491 
490 
493 
490 
- 
s. 
2.98 
2,77 
2,56 
2,36 
2,17 
1.98 
1,80 
1,64 
1,51 
72,0 
0,93 
490 
1,42 
71,6 
Mean 
490,5 
4SS,5 
86049,20 
2,12 
86051,32 
June 14, A. M. Barometer 30,0 inches. 
69.3 
70.3 
70,6 
10.2730 
35.40 
43.51 
52. 2 
11. 0.12 
8.24 
16.35 
24.47 
32.58 
41.10 
49.23 
1,39 
1,33 
1.2S 
1,23 
1,17 
1,13 
1,08 
1,03 
0.99 
0,96 
0,92 
1,36 
1,30 
1,25 
1,20 
1,15 
1,10 
1,05 
1,01 
0,97 
0.94 
490 
491 
491 
490 
492 
491 
492 
491 
422 
493 
3,03 
2,77 
2,56 
2,36 
2,17 
1,98 
1,80 
1,67 
3,54 
1,45 
70,1 
Mean 
491,3 
4S9,3 
S6049,77 
2,13 
86051,90 
