312 Captain Kater's account of Sir Thomas Brisbane’s 
April 25th, 1821, by Sir Thomas Brisbane, London. 
Clock, mean time. Barometer 29,62 Inches. 
Temp. 
Time of co- 
incidence. 
Arc of 
Vibra- 
tion. 
Mean 
Arc. 
Interval in 
Seconds. 
No. of 
Vibra- 
tions. 
Obs. Vibrations 
in 24 hours. 
Corr. for 
Arc. 
Vibrations in 
24 hours. 
63,0 
64,4 
h. m. s. 
10 51 14 
11 0 12 
9 12 
18 10 
27 10 
36 8 
45 8 
54 9 
12 3 9 
12 9 
21 10 
o 
1,55 
1,48 
1,40 
1,32 
1,24 
1,19 
1,12 
1,08 
1,02 
0,9S 
0,92 
o 
1,51 
1,44 
1,36 
1,28 
1,21 
1,15 
1,10 
1,05 
1,00 
0,95 
538 
540 
538 
540 
538 
540 
541 
540 
540 
541 
o 
3,7 4 
3.39 
3,03 
2,69 
2.39 
2,16 
1,98 
1,80 
1,64 
1,48 
63,7 
Mean 
539,6 
537,6 
86079,76 
2,43 
86082,19 
April 26, by Mr. Rumker. 
Clock losing 0 s , 3. Barometer 29,70 Inches. 
64,5 
65,7 
11 16 21 
25 20,5 
34 19 
52 20 
12 1 20 
10 20 
19 19 
28 22 
37 22 
46 22,5 
55 25 
1,29 
1,25 
1,20 
1,08 
1,04 
0,97 
0 93 
0,8S 
0,83 
0,78 
0,73 
1,27 
1,22 
1,14 
1,06 
1,00 
0,95 
0,90 
0,85 
0,80 
0,75 
539.5 
538.5 
541 
540 
540 
539 
543 
540 
540.5 
542.5 
2.64 
2,44 
2,13 
1,84 
1.64 
1,48 
1,33 
1,18 
1,05 
0,92 
- ' 
65,1 
Mean 
540,4 
538,4 
86079,94 
1,67 
86081,61 
April 27, by Sir Thomas Brisbane. 
Clock losing 0 B ,3. Barometer 29,70 Inches. 
j 65,0 
66,2 
10 50 9 
59 8 
11 8 S 
17 8 
26 9 
35 10 
44 10 
53 11,5 
12 2 13 
11 14 
20 17,5 
1,28 
1,21 
1,14 
1,09 
1,03 
0,99 
0,93 
0,89 
0,83 
0,80 
0,77 
1,24 
3,17 
1,11 
1,06 
1,01 
0,96 
0,91 
0,86 
0,81 
0,78 
539 
540 
540 
541 
541 
540 
541,5 
541.5 
541 
543.5 
2,53 
2,25 
2,02 
1,84 
1,67 
1,51 
1,36 
1,21 
1,07 
0,99 
65,6 
Mean 
540,85 
538,85 
86080,21 
1,65 
86081,86 
