Yoh. 6, 1920 
PHYSIOLOGY: H. S. REED 
403 
x = a{l-e~'') (4) 
in which e is the base of the natural logarithms. 
It is of interest to know whether the measurements of the apricot 
shoots will approximate values which will be given by the above equation. 
Reference to table 2, shows that the final mean length of the shoots was 
197 cm. Let us assume that the limiting value of x is 210. Let this be 
TABLE 3 
Length of Apricot Shoots at Weekly Intervals During the Growing Season. 
Values Observed and Calculated from Equation (1) 
t 
X 
1 
10 
q 
1 
c 
1.^ 
0 
c 
1 ' 
On 
w 
U ^ 
►J— ^ 
< 
9 
0 
0 
-19.1 
19.1 
0 
0 
1 
15.8 
0 
17.6 
17.6 
-1.8 
2 
41.5 
19.1 
15.4 
34.5 
7.0 
3 
54.5 
36.3 
12.7 
49.0 
5.5 
4 
68.6 
52.1 
9.5 
61.6 
7.0 
5 
78.0 
66.4 
6.3 
72.7 
5.3 
6 
85.6 
79.4 
3.0 
82.4 
3.2 
7 
93.9 
91.4 
0 
91.4 
2.5 
8 
97.2 
102.0 
-2.7 
99.3 
-2.1 
9 
99.6 
111.8 
-5.0 
106.8 
-7.2 
10 
106.7 
120.8 
-6.8 
114.0 
-7.3 
11 
118.5 
128.8 
-8.1 
120.7 
-2.2 
12 
127.4 
136.0 
-8.9 
127.1 
0.3 
13 
135.3 
142.8 
-9.1 
133.7 
1.6 
14 
140.8 
148.8 
-8.8 
140.8 
0.8 
15 
148.4 
154.7 
-8.1 
146.6 
1.8 
16 
154.8 
159.5 
-7.1 
152.4 
2.4 
17 
158.4 
164.0 
-5.9 
158.1 
0.3 
18 
161.3 
168.1 
-4.4 
163.7 
-2.4 
19 
166.8 
172.0 
-2.9 
169.1 
-2.3 
20 
173.4 
175.6 
-1.4 
174.2 
-0.8 
21 
179.4 
178.8 
0 
178.8 
0.6 
22 
184.2 
181.2 
1.3 
182.5 
1.7 
23 
188.0 
184.0 
2.3 
186.3 
1.7 
24 
190.1 
186.5 
3.2 
189.7 
0.4 
25 
191.9 
188.6 
3.8 
192.4 
-0.4 
26 
193.8 
190.4 
4.1 
194.5 
-0.7 
27 
195.6 
192.2 
4.2 
196.4 
-0.8 
28 
197.0 
193.8 
4.1 
197.9 
-0.9 
