Ttirgor and of Temperature on Growth . 393 
The transfer to the lower temperature causes not merely 
a sudden checking of the growth, but, in fact, a slight con- 
traction. In this case measurements at shorter intervals 
TABLE XVIII. 
Period. 
* Growth. 
Temperature. 
1 2.55-I.25 
16.0 units 
18.9° c. 
1. 25-I.55 
17*0 „ 
19.0 „ 
1.55-2.25 
T4.0 „ 
19.0 „ 
2.25-2.55 
-i *0 „ 
i-8 „ 
2.55-3.25 
i*5 
1.6 „ 
3.25-3*55 
°-5 >> 
*'4 » 
3.55-4-25 
00 „ 
1.2 „ 
4-25-4*55 
io*o „ 
i9-3 » 
4.55-5.25 
n*5 » 
19.6 „ 
5.25-5.55 
1 o*o „ 
J 9-7 » 
1 unit = o-oi 82 mm. 
brought out the fact that the contraction took place during 
the first five minutes after the temperature-change, the growth 
during the remainder of the half-hour being at a complete 
standstill. It then begins at a very slow rate and continues 
TABLE XIX. 
Period. 
Growth . 
Temperature. 
2.35-3.5 
11. 5 units 
20 - 0 ° C. 
3 5-3-35 
- 1-0 „ 
o*7 „ 
3.35-4.5 
-2*5 „ 
0.8 „ 
4-5-4.35 
5*5 » 
20.4 „ 
4*35-5*5 
7-5 „ 
20.4 „ 
5-5-5*35 
12.0 „ 
20*5 „ 
1 unit = 0-0182 mm. 
rather irregularly until the change to the higher temperature 
takes place. This change is marked by the immediate assump- 
tion of a rate of elongation that is maintained with little change 
