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55
dung is removed. To sum up, dung-pits must be so covered as to
prevent the fly depositing its eggs in the pit, and an insecticide
added so as to destroy the larvae as they are hatched from the eggs.
Flies not only breed in manure as above stated, but also in
waste animal and vegetable substances, commonly known as garbage.
Included in this are house refuse, street refuse and some
kinds of trade refuse.
House refuse. In order to prevent flies breeding in house
refuse, it is only necessary that the bin should be kept covered, and
the refuse removed sufficiently often. It will be remembered that it
takes nine days at least for the eggs to develop into the young fly.
A regular weekly collection of the house refuse will prevent this
development; because all refuse in the Borough of Hackney is
destroyed by fire directly after collection.
Householders should assist in this endeavour by keeping their
dust-bins covered, and their yards clean and free from collections
of decaying animal or vegetable matter, or other dirt.
Trade refuse. Manufacturers and builders, etc., should be
urged not to keep on their premises any collections of waste material
of an organic character, but to get them taken away at least once
a week and destroyed. If this cannot be done, they should be
treated with either of the insecticide preparations above-mentioned.
Street refuse. Street refuse from the point of view of preventing
the breeding of flies, should be collected at least once a week,
and should not be stored within the Borough, or within a mile of
the same, unless it is treated with an insecticide preparation. This
is especially important if the sweepings are collections of manure.