in such barrels. Every person keeping manure in the more densely
populated parts of the District shall cause all such manure to be
removed from the premises at least twice every week between June 1
and October 31, and at least once every week between November 1 and
May 31 of the following year. No person shall remove or transport
any manure over any public highway in any of the more densely
populated parts of the District except in a tight vehicle, which,
if not inclosed, must be effectually covered with canvas, so as to
prevent the manure from being dropped. No person shall deposit
manure removed from the bins or pits within any of the more densely
populated parts of the District without a permit from the health
officer. Any person violating any of the provisions shall, upon
conviction thereof, be punished by a fine of not more than $40 for
each offense.

Not only must horse stables be cared for, but chicken yards, piggeries,
and garbage receptacles as well. In cities, with better methods of
disposal of garbage and with the lessening of the number of horses and
horse stables consequent upon electric street railways, bicycles, and
automobiles, the time may come, and before very long, when window
screens may be discarded.


DISPOSAL OF MANURE IN RURAL AND SUBURBAN DISTRICTS.

The control of flies in rural and suburban districts offers a much more
difficult problem. Here it is often out of the question to remove all
manure from the premises twice a week, and the problem is to find some
method of disposal or storage which will conserve the fertilizing value
of the manure and at the same time prevent all flies from breeding, or