HEAT OF THE ARUM. 71 



to been successful in observing the phenomenon in 

 question, which however is well worthy of attention, 

 and may probably not be confined to this species of 

 Arum. 



i 



rather against the existence of a spontaneous heat in vegetables, and 

 he explains even the above striking phenomenon upon chemical prin- 

 ciples, which seem to be very inadequate. 



