THE HOUSE FLY 87 



An instance in point is that of the House Fly. Through 

 ignorance of the ways, habits, and disease-carrying powers 

 of this insect, we tolerate it in our dwellings ; allow it 

 to sow disease germs broadcast over our food ; to deposit 

 its germ-laden excrement wherever it so desires. In fact 

 we give it the fullest licence to sow disease and death 

 amongst us. It is not because we are fatalists. It is 

 solely because we have not realised that the House Fly 

 is the principal ally of the disease microbe army the 

 army which is ever on the alert to attack and destroy us. 



