294 The Control of Mosquitoes 



an opening four inches square when the boards 

 were fastened together. This opening was covered 

 with a square of eighteen mesh copper wire 

 gauze, protected by placing above it a square of 

 half-inch mesh galvanized iron wire, and the 

 whole fastened in place with wooden strips. A 

 wooden spigot was inserted near the bottom of the 

 barrel. 



It was necessary to see that the edge of the 

 barrel was "true," and when not, to correct it; 

 otherwise the cover would not fit snugly and the 

 entire work would be useless. 



Prompt results in mosqmto control may be 

 obtained by making water barrels non-accessible 

 to mosquitoes in the following manner. Muslin 

 or sacking is fastened securely over the top of 

 the barrel, and also over a one-inch overflow hole 

 six inches below the top. The water is obtained 

 from a wood or metal faucet. 



The use of this scheme on a large scale neces- 

 sitates much careful inspection and also cooper- 

 ation on the part of the house tenant. When 

 careless people remove and replace this barrel 

 covering, the barrel may be left temporarily 

 uncovered and mosquitoes propagated and liber- 

 ated unknown to those conducting the anti- 

 mosquito campaign. The cloth should be kept 



