358 



Kelation" of Water to the Behavioe of 



Hourly . 8 10 12 2 4 6 8 10 12 2 4 6 

 UniuA.M. P.M. P.M. A.M. 



8 10 12 2 4 6 8 10 12 2 4 6 

 A.M. P.M. P.M. A.M. 



Fio. 1. — Curves showing relation between daily progress of evaporation and 

 transpiration rates of beetles when exi)ose(l to different strata produced by an 

 association of potato plants. Consult table 5 for above data. 



Fig. 2. — Results recorded In table 5 reduced to unity and curves plotted in 

 order to draw a closer comparison than is given in figure 1. The same conclusions 

 are self-evident. 



