urn . 



^. 



ON the organs of perspiration 



OF PLANTS. 

 BY J. HEDWIG. 



[Tranflated from the German.]* 



No 



one who has attended to the phenomena ol 

 vegetation, can doubt that plants perspire as well as 

 animals. It has been ascertained by many experi- 

 ments, that this function is performed chiefly by the 

 leaves, or other parts of the plant analogous to them; 

 * and principally by their under surface. A number 

 of experiments made by Hales, Du Hamel, and 

 >- more especially Bonnet+, have demonstrated, that 

 : ** both in animals and vegetables, the same pores by 

 which they perspire serve to absorb moisture from 



CO _' 



p.o 



. UJ 



CXZ <; 



*C a: 



■ «tande. Leipzig. 1793, 



f Recherches sur l'usage des fenilles dans les plantes, et sur quelqur s 

 sutres sujets relatifa a l'histoirc de la vegetation, a Leyde. l"54- 



