GLIMPSES INTO PLANT STRUCTURE 35 



the clearest light 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. Fig. 22 shows some of the cells of 



Fig. 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- 

 glomeration of single cells, very similar to the algae 

 previously examined, but much larger. The cell- 

 wall and contents can be well seen, but these cells 

 are transparent and colourless. 



