GLIMPSES INTO PLANT STRUCTURE 35 



the clearest lig'ht upon the ordinary function of the 

 cell in plant-structure. Let us take, instead, from 

 a ripe russet apple, a minute particle of tissue near 

 the core. Fie. 22 shows some of the cells of 



Fi^. 



22. We consume myriads of vegetable cells like these 

 when eating an apple 



which it consists. Although taken from the 

 middle of a mass of pulp tissue, it exhibits a con- 

 o-lomeration of single cells, very similar to the alga; 

 previously examined, but much larger. The cell- 

 wall and contents can be well seen, but these cells 

 are transparent and colourless. 



