458 Capt. Kater’s experiments for determining the variation 
August 11. A. M. Portsoy.— 1st Series. 
Clock gaining 37* ,63. Barometer 30,28 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 
56,3 
57,0 
h. m. s. 
7.35.17 
43.15 
51.14 
59.13 
8. 7-12 
15.11 
23.10 
31.10 
39. 9 
47. 9 
55. 9 
1°20 
1,14 
1,10 
1,04 
1,01 
0,96 
0,92 
0,89 
0,85 
0,81 
0,78 
O 
1,17 
1,12 
1,07 
1,02 
0,98 
0,94 
0,90 
0,87 
0,83 
0,79 
478 
479 
479 
479 
479 
479 
480 
479 
480 
480 
S. 
2.24 
2,06 
1,88 
1,71 
1,57 
1,45 
1,33 
1.24 
1,13 
1,02 
56.6 
Mean 
479,2 
477,2 
86076,88 
1,56 
86078,44 
August 11, P. M. Barometer 30,27 inches. 
59.5 
60.5 
1.38.11 
46. 9 
54. 6 
2. 2. 4 
10. 1 
18.59 
26.57 
34.55 
42.53 
50.51 
58.49 
1,18 
1,13 
1,08 
1,04 
1,00 
0,96 
0,91 
0,87 
0,83 
0,80 
0,78 
1,15 
1,10 
1,06 
1,02 
0,98 
0,93 
0,89 
0,85 
0,82 
0,79 
478 
477 
478 
477 
478 
478 
478 
478 
478 
478 
2.17 
1,98 
1,84 
1,77 
1,57 
1,42 
1,30 
1.18 
1,10 
1,03 
60.0 
Mean 
477,8 
475.8 
86075,81 
1,53 
86077,34 
