47 



eight stations are given in table 2. Since the dates of ob- 

 servation -jrercnot the same for all stations, these values 

 have been approximated from the graphs, but they may be consid- 

 ered as sufficiently accurate to illustrate the manner in 

 which the data at hand supoort the conclusion Just stated. 



Table 2. 



Values o-'' the three climatic indices for the first 

 two weeks in June and the first two we^lrs in August with 

 ratios of highest to lowest values for each index. 



Evaporation 



Sunshine Temperatur'^ efficiency 

 Cphysiological index) 



If the highest value given for ea'-.h of the three indices and 

 for each of the two periods be divided by its lovrest value th 



