=Duty of the Householder.=--It should be the first duty of every householder to secure perfect means for conveying beyond the walls of his domicile everything of a dangerous character that is generated within it, and to secure his home against the entrance of foul air, impure water, or unusual dampness. While the responsibilities of the dweller in the city are shared by the city officials, in that the city supplies the water and provides the sewer to carry off the waste from the kitchen, lavatory, and toilet, yet the householder needs to see that absolute cleanliness is observed, that the pipes are regularly flushed, and the traps kept in good working order, that no decomposing substances are permitted to give off their poisonous gases in cellar, alley, or yard, and that the cellar and foundation walls are free from excessive moisture. The dweller in the country has the additional responsibility of securing and preserving a pure water supply, and of providing proper means for the disposal of the waste of the household. =Dry Cellars.=--The floor of the cellar should be covered with an impervious concrete. The foundation walls, especially if built of soft stone, should be furnished with a course of hydraulic cement or other impervious material, and the inside surface thoroughly coated with the same. Where there is a heater or furnace in the cellar, the evils of dampness are somewhat reduced during the winter months while the fires are kept going. If the soil is wet or springy, a drain of ordinary field tile of small size should be laid all around the inside of the cellar walls, and, together with the rest of the cellar floor, should be covered with concrete. =Kitchen Drains.=--In many country houses this is the only drain, and it is often the source of incalculable mischief, due in most cases to sheer carelessness. The drain pipe need not be large--four inches in diameter is sufficient--but it must be kept free of obstruction, so that the waste from the kitchen may pass off rapidly, and no part of it be suffered to lodge, to decompose, and to send its death-distilling gases back to the kitchen, and thence through the other rooms of the house. Not only should the outlet of the kitchen drain be kept away from the well or cistern, but no part of the drain pipe should come within twenty feet of it. The best of pipes and joints, unless frequently renewed, are apt to break, and a very small aperture leading from the drain pipe into the source of supply of drinking water may endanger not only the single household but the entire community. A well of infected water in London, spoken of as “the Broad Street pump,” and famous in the annals of epidemics, is known to have caused the death of over five hundred people in a single week.