THE HOUSE FLY 



35 



the transfer of disease microbes from infected matter, or 

 sick people to healthy ones, it is a moral duty to at once 

 exterminate all flies in households where there are sick 

 people. Many a father and mother are guilty of the death 

 of one or more of their children, or for serious disease and 



FIG. 12 

 SIDE VIEW OF A HOUSE FLY. 



(From an enlarged model by Mr. Ignaz Matausch in the American Museum 

 of Natural History, Washington. ) 



death in others outside their home, by their failure to re- 

 cognise the fact that House Flies carry infection. It is 

 said, " Man will venture where angels fear to tread." This 

 old saying is only too true, but he does so, not realising the 

 risks he takes. People unconsciously take the most 

 appalling risks. Knowledge gave us the mastery of the 



