4^0 Capt. Rater’s experiments for determining the variation 
August 13, P. M. Portsoy. — 2d Series. 
Clock gaining 423,18 in a mean solar day. Barometer 
30,25 inches. 
Temp. 
Time of coin- 
cidence. 
Arc 
of vibra- 
tion. 
Mean 
Arc. 
Interval 
in 
seconds. 
No. of 
vibrations. 
Observed 
vibrations 
in 34 hours. 
Correc- 
tion for 
Arc. 
Vibrations 
in 34 hours. 
6l,5 
62,3 
h. m. s. 
1.10.17 
18.13 
26. 9 
34. 6 
42. 2 
49.58 
57-55 
2. 5.52 
13.48 
21.46 
29.43 
O 
1,21 
1,16 
1,10 
1,06 
1,01 
0,97 
0,93 
0,90 
0,86 
0,82 
0,79 
0 
1,18 
1,13 
1,08 
1,03 
0,9 9 
0,95 
0,91 
0,88 
0,84 
0,80 
476 
476 
4 77 
476 
476 
477 
477 
476 
478 
477 
S. 
2,2S 
2,10 
1.91 
1,74 
1,61 
1,48 
1,35 
1,27 
1,16 
1,05 
i 61,9 
Mean 
476,6 
474,6 
86079.44 
1,60 
86081,04 
