28 



BOYS AND GIRLS IN BIOLOGY. 



they cannot put these same things together again and 

 make a torula ; so, if yon ask me what life is, I can- 

 not tell yon. Now, let ns see how many things yon 

 have learned abont yeast : First, that it is alive ; second, 

 that it is a plant ; third, that it is a fungus. 



And now, perhaps, yon understand what my buck- 

 wheat-cakes had to do with Science. 



