May, 1922] TRELEASE — INCIPIENT DRYING AND WILTING 259 
Table 2 — Continued 
Ave. Apparent Pinna Width 
Evaporating 
Time 
(10 Pinnae on Each Plant) 
Power of 
of 
Temperature 
the Air (White 
Observation 
Spherical 
Plant A 
Plant B 
Plant C 
Atmometer) 
cm. 
cm. 
cm. 
deg. C. 
cc. per hr. for 
May 3 
preceding hour 
2.07 
2.03 
2.18 
23 
1-93 
1 .00 
2.12 
27 
0.7 
8 a.m 
1.78 
1.67 
2.00 
2o 
1.2 
9 a.m 
1-75 
1-57 
1.98 
30 
I.I 
1-59 
1.49 
1 .92 
32 
1.9 
II a.m 
1.58 
1-51 
2.00 
32 
3-0 
12 noon 
1-57 
1 .42 
I .59 
35 
3-4 
I p.m 
1-55 
1.42 
1-94 
36 
4.6 
2 p.m 
1-59 
1-43 
2.00 
33 
3-8 
3 P-m 
1.59 
1-45 
2.06 
31 
4.0 
4 P-m 
1.63 
1.40 
1.90 
31 
2.3 
5 P-m 
1-74 
1.48 
1-93 
31 
2.1 
6 p.m 
T 
I .o2 
1-59 
2.03 
30 
1-5 
May 4 
6 a.m 
2.02 
1.90 
2.06 
24 
7 a.m 
1-74 
1-75 
2.02 
25 
0.9 
1-73 
1.66 
1.98 
30 
0.4 
9 a.m 
I. DO 
1.50 
1-99 
29 
2.1 
10 a.m 
1.09 
1.48 
1.97 
33 
2.0 
I. DO 
1.47 
1-97 
34 
3-5 
12 noon 
1-55 
1-47 
1-97 
35 
4.1 
I p.m 
I-52 
1-35 
1.91 
36 
6.9 
2 p.m 
T ,1 8 
1 .40 
T 
1.55 
1.07 
34 
3-3 
3 P-m 
T ^0 
1 .02 
1 .02 
1.70 
33 
3-3 
4 P-m 
1 .60 
T 
I .40 
T Q r 
I-85 
31 
4.4 
5 P-m 
T 
I .DO 
1.50 
T Q.r\ 
I .09 
31 
4-1 
6 p.m 
1-73 
T r Q 
i.5« 
1.96 
30 
3-5 
May 6 
6 a.m 
2.02 
1.98 
2.17 
24 
7 a.m 
1.90 
1.77 
1.96 
28 
0.7 
8 a.m 
1.70 
1.60 
1.96 
28 
1.4 
9 a.m 
I.7I 
I-5I 
1.88 
30 
2.0 
1.67 
1.50 
1. 81 
32 
{') 
II a.m 
1.48 
1-51 
1.79 
34 
{') 
12 noon 
1.52 
1-39 
1.79 
32 
3-8 
I p.m 
1-52 
1-31 
1.88 
34 
3-9 
2 p.m 
1.50 
1-33 
1.92 
35 
4.0 
3 P-m 
1-52 
1.30 
1.83 
37 
5-0 
4 P-m 
1.48 
1-33 
1-94 
35 
4.6 
5 P-m. 
1-43 
1.28 
1-94 
33 
4.8 
6 p.m 
1-55 
1-35 
2.03 
32 
1-7 
^ Accident prevented atmometer record. 
area and the apparent pinna width. A smoothed graph, being a straight 
Hne, was then drawn for each of the five tests. The equations for the five 
rectihnear graphs have the general form, y = Kx + L, in which y represents 
the water content in grams per 100 sq. cm. of area (one side), x represents 
the apparent pinna width in centimeters, K is the slope constant of the 
graph, and L is another constant representing the value that y would have 
if the two pinna wings were in contact (the angle between them being then 
