PAPERS OX MEDICINE AND PUBLIC HEALTH 293 



that has been developed by entomologists, biologists, 

 physicians, sanitary engineers, and other scientists, and 

 many cities in Illinois would do well to make use of simi- 

 lar knowledge. Mosquito-control work, when properly 

 planned and carried out, not only prevents sickness and 

 deaths from malaria, but eliminates the mosquito pest 

 and actually benefits a community financially by reducing 

 the large economic loss suffered because of sickness and 

 deaths from malaria. The mosquito-control work al- 

 ready done is an instance of what really can be accom- 

 plished by the proper application of scientific knowledge, 

 and the malaria death-rate map of Illinois shows the 

 large amount of work remaining to be done and only 

 awaiting the realization of the communities and counties 

 of the benefits to be derived from such work. 



