

AMERICAN MUSEUM -GOIDE LEAFLETS 

If anti-fly campaigns are to be successful 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. 
This is the heart of the matter. A few earnest individuals or well- 
meaning Improvement Societies, by themselves, can do little more 
than cause a great deal of trouble and very little good. Laws must 
be made and enforced so that the ignorant or careless may not make 
of little or no avail the work of the intelligent and careful. 
Since 90 flies out of every 100 are probably born in a manure 
pile, the elimination of the natural breeding places of the fly means, 
first and foremost, the proper care of stable manure. Stables should 
not have dirt floors, since it has been shown that the ground moistened 
by animal discharges contains many larve and pupz. Floors should 
be water-tight, preferably of cement, and constructed so as to drain 
freely into a sewer or covered cement pit. In wooden floored stables 
flies should be excluded from the ground beneath the floor boards. 
Openings left for ventilation should be screened with wire and no 
holes should be bored in the floor for drainage of urine. 

Fig. 11. MODEL SHOWING A GOOD TYPE OF MANURE BIN 
(American Museum of Natural History) 
The surface of the manure is being sprinkled with a chemical to prevent fly breeding. - 
20 
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