THE SEEDLING AND YOUNG PLANT. 83 



and phosphates of lime, magnesia, and potash just as 

 there are in ordinary well-water. This extremely dilute 

 solution passes into the root-fibers and up through the 



FIG. 23. A. A small piece of the lower epidermis removed (and highly 

 magnified) to show the stomata, g ; A, minute hairs. The guard-cells 

 contain chlorophyll corpuscles, whereas the ordinary epidermal cells 

 do not. B. A stoma in vertical median section, cut across its longer 

 axis : a, intercellular space : g, guard-cell with chlorophyll corpuscles ; 

 , orifice of stoina. 



vessels, etc., of the vascular bundles of the roots, collect- 

 ing into the larger and larger channels until it reaches 



