47 © Capt. Kater’s experiments for determining the variation 
September 3, A. M. Leith Fort. — 1st Series. 
Clock gaining 26*, 85. Barometer 29 95 inches. 
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. 
56°9 
57,9 
h. m. s. 
7.49-55 
58. 4 
8. 6.13 
14.22 
22.32 
30.42 
38.52 
47. 2 
55-13 
9- 3.22 
11.32 
O 
1,07 
1,03 
0,98 
f',94 
0,91 
0,87 
0,83 
0,79 
0,76 
0,73 
0,70 
O 
1,05 
1,00 
0,96 
0,92 
0,89 
0,85 
0,81 
0,77 
0,74 
0,71 
489 
489 
489 
490 
490 
490 
490 
491 
489 
490 
C # 
1,80 
1,64 
1,51 
1,39 
1,30 
1,18 
1,08 
0,97 
0,90 
0,82 
57,4 
Mean 
489,7 
487,7 
86073,87 
1,26 
86075,13 
September 3. P. M. Barometer 29,97 inches. 
59.5 
59,9 
1. 6, 6 
14.12 
22.19 
30.28 
38.35 
46.43 
54.52 
2. 3- 0 
11. 8 
19-17 
27-26 
1,18 
1,13 
1,06 
1,03 
0,9S 
0,94 
0,90 
0,86 
0,83 
0,79 
0,76 
1,15 
1,09 
1,04 
1,00 
0,9<5 
0,92 
0,88 
0,84 
0,81 
0,77 
486 
487 
489 
487 
488 
489 
488 
488 
489 
489 
2,17 
1,95 
1,77 
1,64 
1,51 
1,39 
1,27 
1,15 
1,08 
0,97 
59,7 
Mean 
488 
486 
S6072,64 
1,49 
86074,13 
