OF A PENDULUM AT GREENWICH AND LONDON. 
89 
Table A. 
Vibrations of Pendulum 12 in London, March 1828. 
Memorandum of the rate of Mr. Browne’s clock by Cumming, from the 10th to the 24th 
of March: received from Mr. Browne. 
S 
March 10. Cumming fast 4.05 
11 . 
13. 
14. 
18. 
19. 
24. 
3.95 
3.57 
3.64 
3.63 
3.63 
4.01 
losing 0.1 per diem, 
losing 0.19 per diem, 
gaining 0.07 per diem, 
keeping Mean Time, 
keeping Mean Time. 
s 
gaining 0.07 per diem. 
Exp. 1. March 17th 1828. Clock making 86400 Vibrations in a Mean Solar Day. 
Barom J be g inin S 30.135 1 
narom. | ending 30>130 / JU - W 
Therm. 
1 
*6 
0*3 
6 .5 
Times of 
Arc and 
Correction. 
Mean 
Interval. 
Reduct, 
to 62°. 
Corrected Vibra- 
tions in a Mean 
Solar Day. 
Disapp. 
Re-app. 
Coincidence. 
6°2.9 
63.0 
63.5 
63.5 
1 
2 
3 
25 
26 
27 
m s 
50 55 
57 29 
04 02 
28 48 
35 24 
41 59 
m s 
50 58 
57 33 
04 06 
28 55 
35 29 
42 04 
h m s 
10 50 56.5*] h m s 
10 57 31.0 >10 57 30.5 
11 04 04.0 J 
1 28 51.5-) 
1 35 26.5 y 1 35 26.5 
1.16 -) 
j> + 0.99 
0.45 J 
s 
394.83 
s 
+ 0.52 
85963.85 
1 42 01.5 J 
ExP. 2. Fresh impulse given. Barom. | 3 q'i28 } ^0.129 
Therm. 
0*3 
!•§ 
Times of 
Arc and 
Correction. 
Mean 
Interval. 
Reduct, 
to 62°. 
Corrected Vibra- 
tions in a Mean 
Solar Day. 
Disapp. 
Re-app. 
Coincidence. 
63.5 
63.5 
63.4 
63.4 
1 
2 
3 
25 
26 
27 
m s 
48 48 
55 21 
01 54 
26 29 
33 04 
39 38 
m s 
48 50 
55 23 
01 56 
26 35 
33 09 
39 45 
h m s 
1 48 49. O'] h m s 
1 55 22.0 V 1 55 22.00 
2 01 55.0 J 
4 26 32.0 -] 
4 33 06.5 > 4 33 06.67 
4 39 41.5 J 
1.281 s 
>4-1-19 
0.49J 
394.36 
s 
+ 0.62 
85963.61 
The reduction to a mean temperature of 62° is throughout computed in the proportion of 0.43 
parts of a vibration per diem for each degree of Fahrenheit. 
MDCCCXXIX. 
N 
