('IIAI'Tl'.k XII 



TIIK l'll\SI()L()(i\ ()!• PLANTS 



'X this chapter I will cnclcavour to 

 present to !ii\' readers a cfjiicise view 

 of the nature and method of the various 

 processes that i;"o on continuallv in the 

 1/ growing plant. 

 These processes were incidental!}' referred to in 

 our examination of the character of the \arious 

 organs of the i)lant. Thus, in dealing with the 

 root, we spoke of its ph)-si()logy so far as 

 concerned the abs(jrption of water 1)\- its root- 

 hairs. In the leaf, we touched upon the correla- 

 tion between the shape and arrangement of the 

 leaf tissues and the part the leaf plan's in the 

 economy of the plant. The physiolog)- of the 



