1912 - 13 .] Studies on Periodicity in Plant Growth. 
99 ' 
Tables showing the Mean Amounts and Mean Rates of Growth for the Natural 
Periods of Illumination and Darkness respectively per Twenty-four Hours. 
On these Numerical Data the Table of Statistics (page 98) is based, and 
also the Rate Graphs (Plates I. and II.). 
No. 1. Tulip Leaf (PI. I., fig. 1). 
No. 3. Calla In- 
florescence 
(PI. I, fig. 3). 
No. 4. Lygodium Leaf 
(PI. L, 4). 
Time. 
Amount. 
Mean 
Rate. 
Amount. 
Mean 
Rate. 
Time. 
Amount. 
Mean 
Rate. 
March 25/26 
•6 
•06 
April 29 
5*25 
•29 
(7 p.m.-5 a.m.) 
26 
1*4 
T 
196 
1-4 
29/30 
5-88 
•98 
26/27 
•25 
•025 
7-9 
•8 
30 
7*87 
•43 
27 
1-75 
T2 
11-6 
•82 
May 30/1 
(9 p.m.-3 a.m.) 
3-6 
*6 
27/28 
1-35 
T35 
6*5 
•6 
1 
11-62 
•64 
28 
1-4 
T 
17*5 
1*2 
1/2 
3-63 
•605 
28/29 
*7 
07 
10-5 
1-0 
2 
10-87 
•60 
29 
6-5 
•46 
15*4 
IT 
2/3 
3T3 
•52 
29/30 
•22 
•02 
10*2 
1-0 
3 
11*62 
•64 
30 
103 
•07 
15-9 
IT 
3/4 
2T3 
•35 
30/31 
IT 
T1 
15-8 
1*5 
4 
10T2 
•56 
31 
3 8 
•27 
11-2 
•8 
4/5 
5-5 
•91 
April 31/1 
1*5 
T6 
1P8 
IT 
5 
11-25 
•62 ■ 
(8 p.m.-4 a.m.) 
1 
2-5 
T5 
17-7 
IT 
5/6 
4-2 
•7 
1/2 
3T 
•38 
8-5 
1*0 
6 
21-37 
1T8 
2 
18 
T1 
22*5 
1-4 
6/7 
4-63 
•77 
2/3 
4-7 
•58 
13-75 
1-7 
7 
23-62 
1-31 
3 
25 
T5 
15-75 
•98 
7/8 
8*25 
1-37 
3/4 
0 
0 
8*4 
1-0 
8 
27-0 
1-5 
4 
2-75 
T7 
11-6 
•72 
8/9 
2-38 
•39 
4/5 
1-85 
•23 
12*0 
1*5 
9 
34-87 
1-93 
5 
6-9 
•43 
13-0 
•8 
9/10 
7-38 
1-23 
5/6 
T5 
•01 
6-75 
•8 
10 
28-87 
1-6 
6 
3*6 
•22 
18 75 
IT 
10/11 
6-88 
1T4 
6/7 
1*2 
T5 
8*0 
1-0 
11 
25-12 
1-39 
7 
8-0 
•5 
160 
1-0 
11/12 
8-0 
1-33 
7/8 
1*0 
T2 
10*75 
1*3 
12 
26-25 
1-45 
8 
3-25 
•20 
21-5 
1*3 
12/13 
7T3 
1T8 
8/9 
4*2 
•52 
11-5 
1-4 
13 
21*37 
1T8 
9 
1*8 
T1 
13*5 
•8 
13/14 
5-63 
•93 
9/10 
•9 
T1 
9*25 
IT 
14 
25*87 
1-43 
10 
335 
•20 
12-7 
•79 
14/15 
8T3 
1-35 
10/11 
2*25 
•28 
8*75 
1-0 
15 
2362 
1-31 j 
11 
4-0 
•25 
18-75 
1T7 
15/16 
4*88 
•81 
11/12 
3-0 
•37 
14*0 
1-7 
16 
28T2 
1*56 
12 
5-0 
■31 
18 0 
1T2 
16/17 
5-88 
•98 
12/13 
2-7 
•33 
133 
1-6 
17 
26-62 
1-47 
13 
1*8 
T1 
13-4 
•83 
17/18 
9-88 
1-64 
13/14 
23 
•28 
7 
•8 
18 
22-87 
1-27 
14 
•7 
•04 
13*4 
•83 
18/19 
5-0 
•83 
14/15 
•66 
•08 
11-5 
1-4 
19 
19-5 
1*08 
15 
1-09 
•06 
13 
•81 
19/20 
4-5 
•75 
15/16 
1-4 
T7 
10-7 
1*3 
20 
21-75 
1-20 
