THE STORY OF THE BACTERIA 



CHAPTER I 



THE CELLS OF THE HUMAN BODY WHAT THEY 

 ARE, AND WHAT THEY DO 



BEFORE beginning to study those low- 

 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 thus gained 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 



