Top—Wire gauze to be soldered completely around periphery on inside of top ring.
Cone—Wire gauze to be soldered completely around inside of cone ring and vertically along seam. A 1-inch inlet hole shall be formed at apex of cone.
Frame—To be made of 24-gauge galvanized iron. This includes top and bottom rings and legs.
Legs—Galvanized-iron channels made as per detailed drawing and secured to top and bottom rings with four rivets, 1⁄8 inch in diameter, to each leg. First turned and drilled as per drawing.
Bottom cylinder ring—J shaped, with bottom edge of cylinder dropped into J—crimped and soldered to secure. Ends of ring riveted to secure.
Cone ring—Galvanized-iron band with 3⁄16-inch round iron wire rolled into lower edge, as per cross-section drawing of "cone ring."
Wing nuts—Four copper wing bolts and nuts, as per drawing, to hold cone securely in place.
MANURE-BOX TRAPS
Manure pits or boxes are desirable for the temporary storage of manure, especially in towns and cities. These have been widely advocated, but the difficulty has been that manure often becomes infested before it is put into them, and flies frequently breed out before the boxes are emptied and often escape through the cracks. To obviate these difficulties a manure box or pit, with a modified tent trap or cone trap attached, is desirable. 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 to cover 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.