72 



Insects and Disease 



at least once a week and spread over the fields 

 to dry, for the flies cannot breed in the dry ma- 

 nure. If it is not practicable to remove it this 

 often the manure should be kept in a bin that is 

 closed so tight that no flies can get into it to lay 

 their eggs. Sometimes the manure may be treated 

 with some substance such as kerosene, crude oil, 

 chlorid of lime, tobacco water or mixture of two 

 or more of these and thus rendered unsuitable for 

 the flies to breed in, but in general practice none 

 of them has been found very satisfactory for the 

 treatment is either not thorough enough or is too 

 expensive of time and material. 



Outdoor privies and cesspools must be carefully 

 attended to. The latter can be easily covered so no 

 flies can get in and if the filthy and in every way 

 dangerous pit under the privy be filled and the 

 dry-earth closet substituted one of the greatest 

 sources of danger, especially in the country and in 

 towns with inadequate sewerage facilities, will be 

 done away with. After these things are done there 

 remain only the garbage cans and the rubbish 

 heaps to look after. 



Of course your neighbor must keep his place 

 clean too, for his flies are just as apt to come into 

 your house as his, so the problem becomes one for 

 the whole community. 



