account of their greater police power and the lesser insistence on the
rights of the individual. Once people are educated to the danger and
learn to find the breeding places, the rest will be easy.

In spite of what has just been said, it is often necessary to catch or
otherwise destroy adult flies, or to protect food materials from
contamination and persons from annoyance or danger; hence the value of
fly papers and poisons, flytraps, and insect screens.


THE USE OF INSECT SCREENS.

A careful screening of windows and doors during the summer months, with
the supplementary use of sticky fly papers, is a protective measure
against house flies known to everyone. As regards screening, it is only
necessary here to emphasize the importance of keeping food supplies
screened or otherwise covered so that flies can gain no access to them.
This applies not only to homes but also to stores, restaurants, milk
shops, and the like. Screening, of course, will have no effect in
decreasing the number of flies, but at least it has the virtue of
lessening the danger of contamination of food.

Insect screens for doors and windows should be well made and must fit
tightly, otherwise they will not keep insects out. It is equally
important that they be made of good and durable screen cloth. Copper
insect screen cloth, although a little higher in price, will prove more
economical in the long run, as it lasts many years. If, however, the
cost of copper screen cloth is objectionable, steel screen cloth, either
painted or galvanized, can be used. Painted steel screen cloth will last
one or more years without repainting, its durability depending upon the