The Health bulletin [serial] - University of North Carolina at Chapel Hill

THE HEALTH BULLETIN. 265door will fall down and cover the holewhenever not in use. As such lidsare an arrangement not generally appreciatedby renters or careless individuals,they may usually be dispensedwith.Where there is real objection toodors, and where it is certain that extraordinarycare will be taken by everyone using the privy, a small ventnot over four to eight inches squaretion with such an arrangement is verypoor, because there are no hot expandedgases present in the flue, asin the case of a stove or fireplace, tocause a draft.In order to furnish light insidethe privy, to exclude flies, and, at thesame time, to protect the seat fromrain and snow, it is best to have thelittle side openings near the top of theprivy covered with glass. The doorA type of privy all too common in rural districts.It shouldbe placed over a pit and boarded up tight in the rear.may be cut in each end of the seat boxand carefully screened. As this willadmit light to the pit and induce fliesto enter, the trap lid covering the holein the seat should be kept in goodorder. Unless there is a strong demandfor these two screened vents inthe seat box they should never be putin. On account of their position, theirexposure to dampness and liability torust,they should be rescreened everyyear. Vents on opposite ends of theseat box give better ventilation andcost less than a vent on one end and abox or flue extended from the seat boxto the roof on the other. The ventilashouldbe kept closed at all times bymeans of a spring hinge.Such a privy as this should be locatedat least 200 feet from any wellor spring, and also, if possible, onlower ground, or where the drainagefrom such a privy is away from thewell or spring. Care should also betaken to prevent surface water draininginto the pit, as this may cause itto cave in, and it also increases theodors given off.The chief objection to a privy ofthis kind is on account of pollution ofthe ground water, but we must bearin mind that where such pollution has