CONTAGIOUS DISEASES 



377 



Statistics everywhere show a remarkable lowering of death 

 rates where this treatment is applied. In New York City 

 before this method was used, 40 per cent of those who had 

 the disease died ; now only 8 per cent die. 



The following table shows the effect on the death rate from 

 the use of antitoxin. 



This means an annual saving of more than three hundred 

 lives in Boston and of five hundred and sixty-six lives in 

 Chicago. 



LABORATORY EXERCISE 32 



Purpose. To observe the effect of the antitoxin treatment for 

 diphtheria on the death rate in New Jersey. 



DEATH RATE IN NEW JERSEY PER 10,000 



