HEAT PRODUCED BY LEAVES 



283 



TABLE 3 



Hydrangea sp. 



Experiment begun March 18, 1911, ended March 21, 1911. Leaves taken from 

 greenhouse plants, fully grown. 



* Containing 60 grams, 

 f Containing 235 grams. 

 X Containing 3 kg. 



Temperatures were observed until March 22, but were not recorded as they 

 continued the same. The leaves were fresh and green when removed. 



