INSECTS AFFECTING HEALTH OF MAN OR ANIMALS. 9) 
feed. Such a method is effective in killing the flies before they have 
an opportunity to deposit eggs. 
Another method of disposing of manure is by means of the so- 
- called ‘maggot traps.”’ This method is not adapted to temporary 
- camps, but in more or less permanent establishments and where the 
' manure is to be used as a fertilizer it is the best that can be used. 
| The principle of the maggot trap is based on the habits of the larve, 
| which crawl away from moist manure when about to pupate, or 
" go into the resting stage. In one type the manure is placed ona 
_ slatted platform which stands over a concrete basin containing water 
| covered by a film of oil, When the maggots are full grown they 
Fic. 3.—Pupz2 of the house fly. About naturalsize. (Newstead.) 
crawl away from the manure and drop into the water and drown. 
The construction of this device will be clear from the accompanying 
illustrations (figs. 4, 5). 
The disposal and treatment of garbage and kitchen refuse.—Kitchen 
garbage also proves to be a good medium for breeding flies, and it is 
important to dispose of it completely. All solid garbage should be 
burned immediately, and liquid garbage should be run into pits and 
covered with oil or liberally treated with borax. If the liquid portion 
of the garbage is mixed with the solid it will be possible to dispose of 
it by burning it if oilis added. If it is not burned it should be treated 
with borax and buried. 
For disposing of all liquid as well as solid garbage, the incinerator 
evolved by Capt. William L. Guthrie is found satisfactory and 
