4 7 2 Capt. Kater’s experiments for determining the variation 
September 5, A. M. Leith Fort. — 1st Series. 
Clock gaining 26%85. Barometer 29,85 inches. 
Temp. 
Time of 
coincidence. 
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. 
6 o°,o 
60,6 
h. m. s. 
7.44. 8 
52.12 
8. 0.18 
8.23 
16.28 
24.34 
32.40 
40.46 
48.52 
56.58 
9. 5. 4 
0 
1,19 
1,14 
1,09 
1,04 
1,00 
0,96 
0,93 
0,89 
0,84 
0,81 
0,79 
O 
1,16 
1,11 
1,06 
1,02 
0,98 
0,94 
0,91 
0,86 
0,82 
0,80 
484 
486 
455 
485 
486 
486 
456 
486 
486 
480 
S. 
2,21 
2,02 
1,84 
1,71 
1,57 
1,45 
1,3 6 
1,21 
1,10 
1,05 
6 0,3 
Mean 
485,6 
483,6 
86070,88 
1,55 
86072,43 
September 5, P. M. Barometer 29,83 inches. 
62,0 
62,3 
0. 58.30 
1. 6.3 5 
14.38 
22.43 
30.47 
38.52 
46.56 
55. 1 
2- 3. 6 
11.10 
19-16 
1,14 
1,09 
1,05 
o,99 
0,95 
0,92 
0,88 
0,86 
0,81 
0,78 
0,75 
Ml 
1,07 
1,02 
0,97 
0,93 
0,90 
o,S 7 
0,83 
0,79 
0,76 
485 
483 
485 
484 
485 
484 
485 
485 
484 
486 
2,02 
1,88 
1,71 
1,54 
1,42 
1,32 
1,24 
1,13 
1,02 
0,94 
62,1 
Mean 
484,6 
482,6 
86070,15 
1,42 
86071,57 
