300 BIOLOGY OF PNEUMOCOCCUS 



ism, and endows the cell with its highly specialized powers for 

 stimulating the tissues of the animal body to the elaboration of 

 substances antagonistic to the type-specific polysaccharide and to 

 the cell as a whole. 



The immunological properties of Pneumococcus and of its chemi- 

 cal constituents and derivatives will be discussed in more detail in 

 later chapters. 



