the Density of the Earth. 
493 
Extreme 
points. 
Divisions. 
Time. 
Point of 
rest. 
Time of mid. 
of vibration. 
Difference. 
h * / « 
h* 1 /> 
/ // 
3 2 ’5 
- 
- - 
27.7 
23,2 
- 
- ~ 
27.58 
5 
- 
— — 
3 7>4 
2 3’5 
- 
- - 
27,28 
27 
11 2 £ 201 
11 25 24 
28 
581 
3°’7 
- 
- 
27,21 
- 
7 3 
00 t>. 
c* ca 
32 Ol 
32 40 J 
- 
32 27 
6 56 
% 3’95 
- 
- 
27,21 
_ - 
27 
28 
39 191 
40 SJ 
- 
39 23 
30.25 
Motion of arm - =6 , 15 
Time of vibration - =6' 59" 
Experiment xi. May 6. 
Weights in positive position. 
34’9 
34 ’ 1 
S4>8 
— ~ 
34>47 
34’ 49 
Weights moved to negative position. 
3 3>3 
28 
9 59 591 
O 
O 
00 
33>3 
29 
10 0 27 j 
28,42 
7 5 
2 9 
27 
6 52 
7 5 1 
3 S 
2 
