or 



VNIVER8ITY 



THE STORY OF THE BACTERIA. 



CHAPTER I. 



THE CELLS WHICH COMPOSE THE HUMAN BODY 

 WHAT THEY ARE, AND WHAT THEY DO. 



T3EFORE beginning to study those low- 

 U liest and smallest forms of life, the 

 bacteria, I wish to ask my reader to look with 

 me in this chapter at some of the higher and 

 more complex forms of living things. In do- 

 ing this we shall be following the course which 

 scientific research has taken, and from the 

 vantage-ground which we shall gain we shall 

 be able the more easily to spell out the simple 

 but significant story of the bacteria, which it is 

 the purpose of this little book to tell. 



In general anatomy we learn that the body 

 consists of a bony framework, around which 



