4 @6 Ca.pt. Kater's experiments for determining the variation 
August 19, A. M. Portsoy. — 2d Series. 
Clock gaining 42 s , 18. Barometer 30,1 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. 
57,3 
57.5 
h. m. s. 
7-38.35 
46.30 
54.26 
8. 2.22 
10.18 
18 15 
26.11 
34. 8 
42. 5 
50. 2 
58.5 9 
1°20 
1,14 
1,11 
1,05 
1,01 
0,98 
0,94 
0,89 
0,85 
0,81 
0,78 
O 
1,17 
1,12 
1,08 
1,03 
0,99 
0,96 
0,91 
0,87 
0,83 
0,79 
475 
476 
476 
476 
477 
476 
477 
477 
477 
477 
2.24 
2,06 
1,92 
1,74 
1,60 
1,51 
;,36 
1.24 
1,13 
1,02 
57,4 
Mean 
476,4 
474,4 
86079,27 
1,58 
86080,85 
