TABLE I. TEMPERATURES OF MAXIMA AND MINIMA CONTRACTIONS 
316 
IOWA ACADEMY OF SCIENCE Voi.. XXVII, 1920 
1 Fourth Period 
X 
< 
o 2s i 
1 
So 
0 d 
1 Third Period 
s 
a 
2o 
II 
ScJ 
o O 
So 
|l 
X 
■2d 1 
O O 
So 
So 
30° to 
35° C. 
o d 
lO . o 
ts. pU^ 
c>4 
rO 
So 
o 2^ 
o . 
•^o 
O o 
1 Second Period 
5d 
o . 
o b 
m bO 
o 
0 O 
LO^ 
r 
So 
X 
0 . Of N 
S,n§3£ 
1 I++ 
So 
s,- 
First Period 
Ed 1 
X 
c 
O 1 
+ i 
20 
o 
2 1 
<D 
CS 
pH 
0 
W 
$-1 
0^ 
Ph 
0) 
Ih 
rt 
W 
Vincent and Lewis 
Carvallo and Weiss 
Three-maxima 
Two-maxima 
Other 
Observations 
