1<)S 



MOSQUITO ERADICATION 



well, if a door on that side is frequently used, to build a little 

 vestibule of screen material about it. Prolonged observation 

 indicates that mosquitoes are bound to get in most single doors, 

 even though they be opened only for a moment. However, if 

 there is a vestibule in front of the door proper, so that the second 

 screen door is not opened until the first is closed, the chances of 

 entrance by mosquitoes are very much decreased. 



Fig. 140. — Vestibule to porch with double screen doors, shown on right and 

 extreme left, the outer doors being at the left. The screening material does 

 not show up very plainly. 



Screen doors should always open outward, else the mos- 

 quitoes which settle on them will be driven into the house when- 

 ever they are opened, particularly when a person enters the house. 

 This is a point that should be kept in mind at all times. 



"When the door of entrance," writes Carter, 1 "is at the top of a 

 flight of steps, no landing intervening, it should be so placed that the 

 edge of the door opposite the hinge comes as near the middle of the 



^'Anti-malarial Measures for Farm-houses and Plantations," U. S. 

 Public Health Service, 1919. 



