242 
Walter Stiles 
Fig. 8. Curves illustrating the influence of temperature on the absorption 
of water by carrot root. (After Stiles and Jorgensen.) 
Table XXIX 
Temperature coefficients of the rate of intake of water by 
storage tissues. (Data from Stiles and Jorgensen) 
Temperature range 
in centigrade 
degrees 
Temperature coefficient (< 2 I0 ) 
Potato tuber Carrot root , 
10-20 
15-25 
20-30 
3-0 
i'3 
275 
1-4 
27 
1-6 
Two points deserve special notice in regard to the results of 
Stiles and Jprgensen. In the first place, the rate of swelling of carrot 
was found to be considerably greater than that of potato. Thus at 
io° C. the rate of swelling of carrot was about nine times that of 
potato under apparently the same conditions with regard to degree 
of swelling, while at 30° C., in spite of the lower temperature co¬ 
efficient in the case of carrot, the rate of swelling was still a little 
