THE MICROSCOPE 



DKCKNIBER, 1895. 



Number 36. 



New Series. 



Objects Seen Under the Microscope. 



By chrysanthemum. 

 XXIX. — STOMATA. 



The leaves of all plants are covered with a skin or epi- 

 dermis which is composed of cells varying in shape in dif- 

 ferent plants, and in addition to these the under side of 

 the leaf is provided with openings called stomata or 

 breathing pores. 



From the under side of the leaf of the Wallflower 

 (fig. 1) take a thin section and examine it in water. Many 

 irregularly shaped cells will be seen and among these some 

 of a half-moon shape, having an opening between them ; 

 these are the stomata. Fig. 2 is from the under surface of 

 a leaf of the Iris, fig. 3 from theLemna minor, fig. 4 from 



