82 



GLIMPSES IXTO PLAXT-fJFE 



wood until the tree becomes a hollow stem, and the 

 leafage above is solely produced by the sap carried 

 upward by the bark. 



Let us inquire a little more carefully into the 



WHITK I'iMM.AK IIAHK. 



formation of a tree-stem, and the different parts of 

 which it consists. Some rather hard names are 

 given to the four princijDal parts of a tree trunk 

 but, by reference to the plate, and by knowing the 

 meaning of the names, I hope they will soon be 



