DETERMINATION OF LEAF TEMPERATURE 



103 



Fig. 2. Leaf temperature apparatus set up for field use 



readings by closing the bottle with the cooler night air within and 

 to have the bottle stoppered all of that day and the following 

 night. Since the temperature of a leaf is usually of interest 

 only when it is compared with the temperature of the air, it 

 is best to take readings of the air temperature immediately 

 before and after the temperature of the leaf is read. This can 



