THE FUNGUS, OR COLORLESS PLANT. 



15 



long, and divide it into three thousand equal pieces, 

 each piece would be the size of one of these little solid 

 bodies in the yeast. Some of them are even four 

 times smaller — regular little Tom Thumbs! Though 

 they are solid, yet we can see through them, just as we 

 can see through glass, hence they are called transpar- 

 ent. Now you see why the yeast looks like a fluid, be- 

 cause these bodies are so small and so clear, or transpar- 

 ent. Next I want you to notice their shape ; they are 

 always round, some of them not as round as your balls, 

 more like a lemon ; but none of them are square like a 

 block, or flat like a three-cent piece. The cover of each 

 one is double, that is, it has an outside and an inside, just 

 as your ball-covers have an outer and an inner surface. 

 When you look through the microscope, these two sur- 

 faces look like two round lines — one within the other 

 (Fig. 6). Inside these lines you will notice something 



Fig. 6. Fig. 7. Fig. 8. 



which looks like little grains (Fig. 7), and this whole 

 cover, with all that is inside of it, is called a cell. 

 Now you must learn of what these cells are made. 

 First, there is the outside part which is like a bag, or sac, 



