Influence of Prevailing Wind Direction 

 and its relation to Anopheles entering houses. 



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A.'At:Cime of "wind Anopheles collect at rear of honee . 



Cleeward.Bide). 



Door ( b) is the danger point. 



Door (a) may be held open by wind. 



Acrows denot&reBting or aollectins places of Anopheles, 



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 B.- Screenedporch adyantageously located. 



Diagrams showing best locations for screen doors 



87 



