8 FARMERS” BULLETIN 1734. 
tent trap or cone trap attached, is desirable. Mr. Arthur Swaim, of 
Florida, has devised a form of manure trap consisting of a series of 
screen tents with exit holes along the ridges of these, over which is 
a screen box. The latter retains the flies as they pass through the 
holes in the tents. The entire trap is removable. 
In order to retain the fertilizing value of manure to the greatest 
extent it is advisable to exclude the air from it as much as possible 
and to protect it from the leaching action of rains. This being the 
case, there is really no necessity for covering a large portion of the. 
top of the box with a trap, but merely to have holes large enough 
to attract flies to the light, and cover these holes with ordinary 
conical traps, with the legs cut off, so the bottom of the trap will fit 
closely to the box. The same arrangement can be made where 
manure is kept in a pit. In large bins two or more holes covered 
with traps should be provided for the escape of the flies. 
Manure boxes should be used by all stock owners in towns and 
cities, and they are also adaptable to farms. The size of the manure 
bin should be governed by the individual needs, but for use on the 
farm it is desirable to make it large enough to hold all of the manure 
produced during the busiest season of the year. A box 14 feet long, 
10 feet wide, and 4 feet deep will hold the manure produced by two 
horses during about five months. About 2 cubic feet of box space 
should be allowed for each horse per day. The bin should be made 
of concrete or heavy plank. When the latter is used the cracks should 
be battened to prevent the escape of flies. The bin may have a floor 
or it may be set in the ground several inches and the dirt closely 
banked around the outside. For the admission of the manure a good- 
sized door should be provided in either end of a large bin. <A portion 
of the top should be made easily removable for convenience in empty- 
ing the box, or one entire end of the box may be hinged. On account 
of the danger of the door being left open through carelessness, it is 
advisable to arrange a lift door which can be opened by placing the 
foot on a treadle as the manure is shoveled in. The door should be 
heavy enough to close automatically when the treadle is released. A 
manure bin with flytrap attached is shown in figure 6. 
Attention is directed to a maggot trap devised by Mr. R. H. 
Hutchison, as described in Bulletin No. 200 of the Department of 
Agriculture. Where large quantities of manure are produced on a 
farm this method of storing the manure on a platform and trapping 
the maggots which breed out may be more convenient than the 
manure bin. 
WINDOW TRAPS. 
Prof. C. F. Hodge has designed a trap which is really a modified 
tent trap adapted to use in a window. This trap is constructed so 
