270 The Control of Mosquitoes 



The owners of the aqueducts and wells sold the 

 water to carriers, who in turn sold it to the con- 

 sumer. The price of water sold from the carts was 

 usually five cents for a five-gallon can and some- 

 times doubled toward the end of the dry season. 



It will be seen from the foregoing that climatic 

 and topographical conditions are very favorable 

 to Aedes calopus in the Canal Zone, and espe- 

 cially in the cities of Panama and Colon. In the 

 adjacent settlements of Balboa, Ancon and Cristo- 

 bal, where scarcity of water compelled each house- 

 hold to husband to the utmost any supply 

 obtainable, the result was that these cities and 

 their environs harbored thousands of ideal mos- 

 quito breeding places. 



