the Density of the Earth. 
Weights moved to positive position. 
Extreme 
points. 
Divisions 
Time. 
Point of 
rest. 
Time of mid 
of vibration. 
Difference. 
h. , 
h - / // 
1 
Si 
3 h 3 
25 
11 IO 
25 1 
23 
11 
3 * 
11 IO 40 
1 7> 1 
— 
— 
- 
24,02 
- 
7 
3 
22 
17 
6 1 
J 7 43 
3°>6 
23 
26 / 
- 
- 
- 
24,17 
- 
7 
1 
25 
24 
33 l 
24 44 
18,4 
2 3 
25 
17 / 
— 
— 
- 
24,32 
- 
7 
5 
23 
31 
21 1 
3 1 49 
25 
32 
9 J 
% 9>9 
— 
- 
- 
24,4 
- - 
6 
59 
25 
23 
38 
39 
39 1 
3 1 / 
- 
38 48 
*&4 
- 
- 
- 
24,5 
: 
7 
6 
23 
45 
16 | 
45 54 
25 
4 6. 
12 J 
% 9>3 
Motion of arm on moving weights from 
midway to pos. - = 3,1 
pos. toneg. - = 6,18 
neg. to pos. - = 5,92 
Time of one vibration in neg. position - = 7' 1" 
pos. position - =7 3 
