222 
Captain Hall’s details of experiments 
Experiment No. I. at London. 
Observation of Coincidences. 
3d July, 1820. P.M. atMr.BROWNE’s. Lat. 51 31 8 
Height above the sea 83 feet. Clock losing 1‘ 
/ 
’^Ba, 29 , 92 . 
Temp. 
Fahren- 
heit. 
Time of co- 
incidence. 
Arc of 
Vibra- 
tion. 
Mean 
Arc. 
Interval 
in 
Seconds. 
No. of 
Vibra- 
tions. 
Observed 
Vibrations 
in 24 hours. 
Correc- 
tion for 
Arc. 
Vibrations in 
24 hours. 
o 
6 7>5 
68,2 
h, m. S. 
0 4 17 
21 1 1 
38 6 
55 5 
1 lz 5 
29 6 
1,19 
1,07 
0 , 9 + 
0,86 
0,78 
0,71 
O 
*>13 
1,00 
0,90 
0,82 
°>74 
1014 
1015 
1019 
1020 
1021 
2,09 
1,64 
033 
1,23 
0,90 
67,8 
Mean 
1017,8 
O 
on 
00 
86228,63 
044 
86230,07 
4 th July, P. M. at Mr. Browne’s. 
Clock losing - 
I s 40 ^ ai ' 
66,9 
68,1 
h. m. s. 
0 54 41 
1 I! 31 
28 24 
45 >9 
2 217 
19 13 
3 6 !3 
1,20 
1,08 
°>97 
0,88 
0,80 
°>73 
0,65 
i>i+ 
1,02 
0,92 
0,84 
0,76 
0,69 
1010 
1013 
1015 
1018 
1016 
1020 
2,13 
071 
039 
1,16 
o,95 
0,78 
6 7>5 
Mean 
,OI 5>33 
1013,33 
86228,41 
035 
86229,76 
