3i8 The Control of Mosquitoes 



At what cost can this work be accomplished? 

 Many factors must be taken into consideration 

 before even an approximate estimate can be 

 attempted. The size of the community; the 

 geographical and topographical features; the me- 

 teorological data; the character of the water 

 supply; the method of sewage and refuse disposal; 

 the architectural characteristics of the dwellings; 

 and the customs and habits of the natives, must 

 all be considered. 



If it is desired to permanently rid a city 

 of yellow fever, a complete water and sewer 

 system should be installed, and all houses 

 connected with them, to remove the necessity 

 of having water containers in or near habita- 

 tions. 



It is obvious that the cost of such a system must 

 vary, and depend on local conditions, such as the 

 size of the community, the distance from avail- 

 able water supply and sewage disposal points, the 

 cost of material and labor, etc. It is scarcely fair, 

 however, to charge the cost of water and sewerage 

 system to anti-yellow fever work exclusively, 

 because these systems will benefit the community 

 in many more ways than in aiding yellow fever 

 eradication; some of the most obvious benefits 

 being the reduction, if not the entire elimination. 



