in the length of the pendulum vibrating seconds. 495 
May 11, A. M. at Shanklin Farm. 
Clock losing 9 s , 4 in a mean solar day. Barometer 30,17 
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. 
60,5 
61,3 
h. m. s. 
9.27. 9 
35.35 
44. 3 
52.31 
10. 0.59 
9.27 
1756 
26.25 
34.53 
43.22 
51.51 
1,22 
1.14 
1,09 
1,04 
0,99 
0,95 
0,92 
0,88 
0,83 
0,79 
0,76 
O 
1,18 
1,11 
1,06 
1,01 
0,97 
0,93 
0,90 
0,85 
0,S1 
0,77 
506 
508 
508 
508 
508 
509 
509 
508 
509 
509 
S. 
2,28 
2,02 
1,84 
1,68 
1,54 
1,42 
1,33 
1,18 
1,07 
0,97 
60,9 
Mean 
508,2 
506,2 
86050,6 1 
1,53 
86052,14 
May 11, P. M. Barometer 30,16 inches. 
61,6 
62,1 
0. 22.53 
31.19 
39.46 
48.14 
56.41 
1 . 5. S 
13.36 
22. 3 
30.31 
38.59 
47.28 
1,20 
1,14 
1,08 
1,04 
0,99 
0,94 
0,91 
0,87 
0,83 
0,80 
0,76 
1,17 
1,11 
1,06 
1,01 
0,96 
0,92 
0,89 
0,85 
0,81 
0,78 
506 
507 
508 
507 
507 
508 
507 
508 
508 
509 
2,24 
2,02 
1,84 
1,68 
1,51 
1,38 
1,30 
1,18 
1,07 
1,00 
61,8 
Mean 
507,5 
505,5 
86050,21 
1,52 
86051,73 
