Centrifugal Force as Geotropic Stimuli . 
749 
.*. Cent, force — 5*28 mg. 
C — 5-28 cos i2°+sin 12 0 = 5-37 mg. 
CT 
0.96. 
mg.t 
Experiment 3. Dec. 15, 1912. 10.45 a.m. lo 7.0 p.m. 
Radius of rotation at middle of box =20 cm. 
0 = 95 °- 
Total period (/+ T) = 1 1 m. 
t 
II, 5 * 
R = 3-86. 
Point of equilibrium is at middle of box. 
.*. r — 20. 
C = 12 - 0 . 
M.E.C. = 0*94. 
C (corrected) = 11*28. 
CT 
:= 0.98. 
mg.t 
Experiment 4. Dec. 16, 1912. 10.15 a.m. to 5.40 p.m. 
Radius of rotation at middle of box = 25 cm. 
6 = 96°. 
Total period (/-J- 7 7 ) = 11 m. 
g 
T 
^ = 3 - 83 . 
Point of equilibrium is 2*5 cm. below middle of box. 
.-. r — 22*5 cm. 
C— 13-3 m g- 
M.E.C. = 0*94. 
C (corrected) = 12*5. 
CT 
.*. = 0-98. 
mg. t 
Experiment 5. Dec. 16, 1911. 8.14 p.m. to Dec. 17, 11.10 a.m. 
Radius of rotation at middle of box = 30 cm. 
e = 94 0 . 
Total period (/ + T) — 5 m. 30 s. 
t 
I 3 * 4 * 
R = 3*40. 
Point of equilibrium is at middle of box. 
r — 30 cm. 
C -- 14-0 mg. 
CT 
.*. : = 1*04. 
mg.t 
Note. This experiment was performed before the M.E.C. was adopted. 
= 12 - 8 . 
