740 Hi ley. — On the Value of Different Degrees of 
t C 
Thus — = 1 8*2, — = 18-5. 
r mg 
CT 
= 1 - 02 . 
mg.t 
Experiment 17. March 26, 1912. 10. to a.m. to 9.15 p.m. 
Temp. 20 0 C. 
Radius of rotation at middle of box = 45 cm. 
6 = 92°. 
Total period (t+T) = 11 m. 
/ 
— = 1 9«o. 
R - 3.56. 
Point of equilibrium is 2-5 cm. below middle of box. 
r — 42*5 cm. 
C — 21-4 mg. 
But M.E.C. = 0 87. 
/. C (corrected) = 18-6 mg. 
Thus y 
CT 
’ * mg. I 
1 9 ’°, 
0-98. 
<C 
mg 
i8-6. 
Experiment 18. March 22, 1912. 11.30 a.m. to 9.20 p.m. 
Temp. 20 0 C. 
Radius of rotation at middle of box = 45 cm. 
0 = 92° 
Total period (/+ T) = 11 m. 
~ = 20-85. 
R = 3*66. 
Point of equilibrium is 0-5 cm. above middle of box (not very clear). 
r — 45*5 cm. 
C= 24-6. 
But M.E.C. = 0-85. 
C (corrected) = 20-9 mg. 
t C 
Thus 7= = 20-85. — = 20-9. 
1 mg 
CT 
- = i-oo. 
mg.t 
The above results are summed up in the following table ; 
