GROWING-POINTS OF STEMS AND ROOTS 151 



mount in dilute glycerine. Examine first with low and then with a high 

 power. Make a sketch showing the general arrangements of the parts 

 seen, viz., root-cap, plerome and periblem. 



Endeavour to prepare sections of the apex of the roots of maize, peas, and 

 other large seeds. ^ ' ' ;, 



Ex. 77. — ^Ciit" longitudinal sections through th^ apex of stems within the 

 terminal buds of common trees. Treat and examine as indicated above. 

 Observe and sketch the parts seen : note the first beginnings of leaves. 



