8 Insect Life : Its Why and Wherefore 
matters and so renders them unfit for the 
development of other bacteria. 
Experiments in America have proved 
fairly successful where kerosene has been 
used for spraying manure and refuse, while 
in some parts of the U.S.A. the matter has 
been so seriously taken up that the health 
authorities have laid down rules with 
regard to stables and the depositories of all 
kinds of refuse and garbage ; all such 
places being made more or less airtight to 
prevent the ingress and egress of flies. 
Of fly traps we may say their name is legion. 
Much has been done by the U.S.A. Depart- 
ment of Agriculture, but flies there are and 
flies there will be until the whole country 
takes the matter up seriously. 
Its Obvious Mission. — The house fly 
may be a nuisance, it may be a menace 
to the health of the home. Would it find 
its place at all in the home, or at any rate 
in anything like such numbers if pre- 
cautions as to cleanliness were more 
general ? The dirtier a house is or the 
dirtier the neighbourhood, there will you 
find the greater number of flies. Go into 
the cottage ill kept, ill ventilated, ill 
