Jan. 3,1916 
Hourly Transpiration Rate on Clear Days 
629 
the case of the three cereals wheat, oats, and rye, or approximately with 
the transpiration, as in the case of sorghum, alfalfa, and amaranthus. 
I 
1 
I 
Fig. 12.—Graphs showing hourly transpiration of spring rye and the hourly values of the cyclic environ¬ 
mental factors, all plotted in percentage of the maximum or maximum range. 
Fig. 13.—Graphs showing the hourly transpiration of alfalfa and the hourly values of cyclic environmental 
factors, all plotted in percentage of the maximum or maximum range. 
This is clearly shown in figure 16, in which the two graphs are plotted for 
each plant. 
The transpiration rises in advance of the temperature in the case of 
wheat, oats, and alfalfa; approximately with the temperature for rye 
