How Science Helps the Body 165 



are found to be much less liable to acquire 

 the disease in prevailing epidemics. These 

 results are due to the fact that some patho- 

 genic bacteria, instead of setting toxic sub- 

 stances free as they grow, store them up in 

 their bodies. Later when these are killed by 

 heat and degenerate, the toxins are set free, 

 inciting the body cells to their protective 

 activities. 



We have thus far been considering the 

 ways in which the body may be helped to 

 free itself from the presence and action of 

 poisons produced by disease-inciting germs. 

 Now what can be done to help the body to 

 kill and destroy the bacteria themselves and 

 so stop the poison fountains at their sources? 



It has long been known that the body 

 fluids kill bacteria in enormous numbers, even 

 those of serious infectious maladies, and we 

 have much knowledge of the chemical agencies 

 by which this is accomplished. 



It has been shown that there are two groups 

 of substances in the body fluids, one at least 

 of which may be increased in artificial im- 

 munization, which, when acting together, 



