the Density of the Earth. 
Weights moved to positive position. 
,505 
Extreme 
points. 
Divisions. 
t5>4 
4> 8 
14,8 
5,9 
14*35 
6, 8 
1 3>9 
7,5 
10 
9 
9 
10 
10 
9 
11 
10 
10 
11 
13^5 
Motion of the arm 
Time of vibration 
to 5 59 
6 27 
} 
12 43 ) 
13 11 J 
20 24 
56 
} 
48 30 
49 11 
55 26 1 
56 10 d 
Time of mid. 
of vibration. 
9,93 
10,07 
10,2Q 
10,35 
10,46 
10,52 
10,6 
h. 
10 5 56 
13 5 
20 13 
4 8 42 
55 4 8 
6*34 
7' 7" 
The two following experiments were made by Mr. Gilpin, 
who was so good as to assist me on the occasion. 
experiment xvi. May 28. 
Weights in negative position. 
22,55 
8,4 
- 
- _ 
15,09 
21 
— 
os mr 
1T9 
9^2 
MDCCXCVIII. 
3 T 
. 
• : O T • f 
i 
