22 
Journal of Agricultural Research 
Vol. XXVI, No. 1 
Kiesselbach (6, p. 115-117) in his study of the water relations of corn 
reported some preliminary experiments with the temperature 01 tne 
turgid and wilted leaves of that plant. By inserting the bulb of a 
thermometer momentarily in the fold of the leaves he found that a trans- 
piling leaf of corn was uniformly cooler than a dry dead one, the difference 
in temperature amounting in one case to as much as 8.5° F. in direct sun¬ 
shine at 2 p. m., and to 4.2° F. in the shade. The average daily tem¬ 
perature of the green leaf was found to be 2.2 0 F. below the air tempera¬ 
ture while the dry leaf was i.6° F. higher than the air. Using a similar 
method Loftfield (7) made a few observations on the temperature ot 
the leaves of alfalfa, potato, and sugar beet in elation to stomatal 
behavior. He found that usually the temperature of the leaves with the 
stomata open was lower than that of the air and that die temperature o 
the leaves with closed stomata was higher than that of the air. 
The transpiration-temperature experiments herein reported were con¬ 
ducted with turgid and wilted plants of Pride of Saline, Freed White 
Dent and Kansas Sunflower varities of com; fetenta, Dwarf Yellow milo 
and Freed sorgo of the sorghums; New Era cowpeas; and Medium Yellow 
