the Density of the Earth . 
4% 
Extreme 
points. 
Divisions. 
Time* 
Point of 
rest. 
Time of mid. 
of vibration. 
Difference. 
7 ,i 
h - , n 
h. , .. 
/ n 
Km 
11 
2 3 48 X 
10 75 
15 25 
i 3 > 6 
12 
5 18/ 
2 2 50 
Motion of arm on moving weights from 
midway to pos. 
pos. to midway 
Time of one vibration - 
= 15,87 
= 15,45 
= 14' 4 a " 
J 
Experiment iii. Aug. 7. 
The weights being in the positive position, and the ' 
arm a little in motion. 
3 E 5 
29 
- 
- 
3°, 12 
31 
29, 1 
30,02 
Weights moved to midway position. 
9 
14 
15 
10 34 i 8 \ 
35 8 / 
- 
10 34 55 
20,5 
15 
14 
49 3 1 ! 
5 ° 27 / 
14,8 
49 39 
9,2 
14 
15 
11 5 7 ] 
6 j 8 J 
14,°7 
11 4 17 
14 44 
14 38 
s2 2 
1 
