69 



CHAPTER X. 



OP THE SECRETED FLUIDS OF PLANTS. 

 GRAFTING. HEAT OF THE VEGETABLE 

 BODY. 



The srip in its passage through the leaves 

 and burk becomes quite a new fluid, possess- 

 ing the peculiar flavour and qualities of the 

 plant, and not only yielding woody matter 

 for the increase of the vegetable body, but 

 famishing various secreted substances, more 

 or less numerous and different among them- 

 selves. These accordingly are chiefly found 

 in the bark ; and the vessels containing them 

 often prove upon dissection very large and 

 conspicuous, as the turpentine-cells of the 

 Fir tribe. In herbaceous plants, whose stems' 

 are only of annual duration, the perennial 

 roots frequently contain these fluids in the 

 most perfect state, nor are they, in such, 

 •confined to the bark, but deposited through^ 



