THE HOUSE FLY DISEASE CARRIER 



her of each family or of several neighboring families 

 hired to clean the privy regularly; or (2) the landlord 

 can be held responsible for the cleaning of all privies 

 of his tenants, receiving from the county a certain sum 

 for the service: or (3) "trusties" from prisons might 

 possibly be utilized in some districts not too sparsely 

 settled; or (4) a portion of the county privy tax might 

 perhaps be apportioned by school districts and be dis- 

 tributed as prizes among the school boys who keep 

 their family privies in best condition; or (5) each 

 head of family might be held responsible for any soil 

 pollution that may occur on his premises and be fined 

 therefor. 



"Undoubtedly the problem of the privy cleaning in 

 the open country is much more difficult than in cities, 

 villages, and towns, and in the last instance involves 

 a general education of the rising generation of school 

 children, more particularly of the girls (the future 

 housekeepers), in respect to the dangers of soil pollu- 

 tion." 



THE CAPTURE OF ADULT FLIES OUTSIDE OF HOUSES 



Under this heading, the plan proposed by Professor 

 Hodge, mentioned in the introductory paragraphs of 

 this chapter, must be considered. His idea, it will be 

 remembered, is to catch the adult flies before they lay 

 their eggs and before they become a nuisance in houses. 

 Isolated observations by Dr. C. Gordon Hewitt have 

 shown, as elsewhere stated, that in England ten to 

 fourteen days elapse after an adult female fly issues 



