174 



The Microscope. 



of an inch wide, and composed of large, quite regular, clear- 

 white, deeply serrated cells; containing in the young, fresh 



leaves some protoplasm 

 and an occasional nu- 

 cleus (see Fig. 8). Very 

 few stomates, if any, 

 are present. The epi- 

 dermis on the under side 

 of the leaves is about 

 3-gVff of an inch thick, 

 and composed of thin- 

 walled, empty, deeply 

 serrated cells (see Fig. 

 9). The numerous large 

 stomates are set a little 

 below the level of the 

 epidermis,and the guard 

 cells of the stomates are 

 filled with chlorophyll 

 bodies. 



The center of the 

 leaf is composed of the 

 usual palisade cells and 



Fig. 9. 



Epidermis from the lower surface of the leaf, 

 showing the epidermal cellsand the stomates, with 

 the chlorophyll bodies in the guard-cells of the loose parenchyma, with 

 stomates. Drawn with the %in. objective, and the numerous lar^e intei'- 

 "C" eye-piece. . -,-,. 



cellular spaces (see .big. 



Fig. 10. 



Cross section of the leaf, showing none of the frame-work, but only the fleshy 

 part of the leaf. The section is taken at right angles to the midrib. Drawn with 

 the ^-in. objective, and the " A " eye-piece. 



