Temper attire on the Rate of Growth in Pisiim sativum. 45 
Table III. 
The columns give respectively (i) the number of roots measured in each case ; (2) the temperature 
for each experiment; (3) the mean rate of growth per half-hour in micrometer divisions; (4) the rate 
calculated in millimetres per 2 2| hours ; and (5) figures from Text-fig. 3 for comparison. 
Mean rate per 
Mean rate 
No. 
Temperature. 
| hour in micro- 
per 2 2\ hours 
Text-fii 
meter divisions. 
in mm. 
1 
0 
00 
6 
0-06 
I *59 
1 *3 
1 
1*0° 
0.05 
1*26 
I *4 
1 
3 - 7 ° 
0*11 
2.77 
2*8 
2 
4 * 7 ° 
o* [8 
4-48 
3-5 
3 
4 * 9 ° 
0-13 
3-28 
3-6 
1 
5 * 5 ° 
0*27 
6-88 
4 * r 
2 
6-o° 
0-25 
6*30 
4*4 
2 
6-0° 
0*2 I 
5*30 
4*4 
2 
8-6° 
0'26 
6-50 
6-8 
3 
9 *i° 
0*27 
6-93 
7-3 
3 
9 * 9 ° 
0-37 
9*45 
8-2 
3 
io-6° 
0*31 
7-76 
9*o 
3 
11-0° 
0*42 
io-6 
9*3 
2 
ii*9° 
0-41 
io*3 
10-3 
2 
I 2 ‘ 2 ° 
0-46 
ii*6 
10-7 
2 
13 - 5 ° 
0-50 
I2'6 
12. 1 
3 
14 * 5 ° 
0^67 
i6*8 
13-2 
3 
14 * 5 ° 
o *54 
13-6 
13-2 
3 
14 * 75 ° 
0*49 
12-25 
13*5 
3 
18*3° 
0*91 
22-8 
17*3 
4 
19-4° 
0*82 
20*7 
18-5 
3 
21-8° 
1*10 
27*7 
2i-r 
4 
23-0° 
1 *20 
30-2 
22-4 
3 
23*0° 
1-31 
33 *o 
22*4 
4 
23-9° 
1-50 
37*8 
23*3 
3 
25-0° 
1*40 
35*3 
24*5 
4 
26-1° 
i>6o 
40-8 
25-8 
3 
26-3° 
i*6o 
40*8 
26-0 
3 
26-5° 
1*70 
42*6 
26-3 
4 
26*6° 
i-8o 
45*4 
26-4 
6 
26-7° 
i*6o 
40-8 
26-5 
1 
27*6° 
i*6o 
40-8 
2 7*4 
1 
27-7° 
1-65 
41-6 
2 7*5 
7 
29-3° 
i*99 
48-6 
29.3 
Table IV. 
Relation of Growth to Time at High Temperatures . 
The first column gives temperature ; the second, third, and fourth, the growth in the first three 
ten-minute intervals ; the fifth column to the tenth give the growth in the first six half-hour intervals ; 
in the eleventh is given the growth in the eleventh half-hour ; and in the twelfth, that in the seven- 
teenth half-hour. The numbers in brackets indicate the number of peas measured in each case. 
Temp, Ten-minute Intervals . Half-hour Intervals. 
1 
2 
3 
4 
5 
6 
7 
8 
9 
10 
11 
12 
30 * 3 ° 
0-68 
o*55 
o*54 
1-74 
i-68 
i -77 
1-90 
i-88 
1-78 
i*5 
1-2 
( 15 ) 
(43) 
(32) 
(20) 
(12) 
(11) 
(10) 
(3) 
(8) 
35*o° 
0-38 
0-38 
0-31 
1-09 
1-14 
i* 3 i 
1.25 
1*23 
1-07 
0*58 
(13) 
( 15 ) 
(8) 
(8) 
(11) 
(10) 
( 9 ) 
( 9 ) 
49 * 5 ° 
0*24 
0-19 
O-II 
o*54 
o*i6 
0'04 
o-o 
(8) 
(8) 
42 * 7 ° 
0-12 
0-03 
0'02 
0*17 
o-o 
44*5° o-o 
