49° Capt. Kater’s experiments for determining the variation 
October 25, A. M. Arbury Hill. 
Clock losing6*,20. Barometer 29,56 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. 
50,7 
51,2 
h. m. s. 
9.19.37 
28.13 
36.50 
45.26 
54. 3 
10. 2.42 
11.19 
19 56 
28.34 
37-14 
45.52 
O 
1,18 
1,12 
1,08 
1,03 
0,98 
0,93 
0,89 
0,84 
0,82 
0,79 
0,76 
O 
1,15 
1,10 
1,05 
1,00 
1,95 
0,91 
0,86 
0,83 
0,80 
0,77 
516 
517 
516 
517 
519 
517 
517 
518 
520 
518 
S. 
2,17 
1,98 
1,81 
1,64 
1,48 
1,36 
1,21 
1,13 
1,05 
0,97 
50,9 
Mean 
517,5 
515,5 
86059,92 
1,48 
86061,40 
October 25, P. M. Barometer 29,54 inches. 
52,0 
52,6 
1.45.36 
54.12 
2. 2.49 
1 1 .25 
20. 2 
28.39 
37-16 
45.53 
54.31 
3. 3. 8 
11.46 
1,14 
1,09 
1,03 
1,00 
0,96 
0,92 
0,88 
0,83 
0,80 
0,77 
o,73 
1,11 
1,06 
1,01 
0,98 
0,94 
0,90 
0,85 
0,81 
0,78 
0,75 
516 
517 
516 
517 
517 
517 
517 
518 
517 
518 
2,02 
1,84 
1,67 
1,57 
1,45 
1,33 
1,18 
1,07 
1,00 
0,92 
52,3 
Mean 
517 
515 
86059,59 
1,41 
S6061,00 
