It cannot be too much emphasized, however, that the cellar is, from the standpoints of sanitation and comfort, the most important part of the house. There should be no attempt to save expense by limiting its proper size, materials for walls, windows for ventilation, drainage, etc., for money so saved will inevitably be paid out many times over in coal bills, doctor's fees, and, perhaps, undertaker's bills. A dry cellar must be secured at all costs, for the air from it permeates the whole house. Where this is damp, it leads not alone to disease among the inmates, but to the disintegration of the house itself, through what is called "dry rot," but is paradoxically the result of dampness. Edgar Allan Poe, in his weird story, "The Fall of the House of Usher," has given a mystical interpretation of the dissolution of an old homestead which really has a scientific explanation that might be found in the cellar. The proper floor of a cellar is a layer of broken stones in which tile drains are laid, having outlets into a common drain, and over which a layer of concrete is placed, The walls, of plastered stone, brick, or concrete, should rise above the ground far enough to permit small windows, and prevent the admission of surface water from rain or snow. These windows should open from within, upward, and there should be hooks on the ceiling to keep them open for ventilation. Where a house is heated by a furnace, the style of this should be selected with great care, special regard being had to the economy of fuel. The systems of steam-heating, hot-water heating, or hot-air heating have each their merits, depending on the location of the house and the climate of the region. The cellar can also be used as a storeroom for those things not affected by the heat of the furnace, such as perishable food requiring an ice-box or a cool place, vegetables, especially those with a penetrating odor; apples, canned fruit and goods, etc., should be kept here, and barrels of commodities, such as vinegar, that are bought in large quantities. Shelves should be built on the walls and hooks hung on the rafters to increase the facilities for storage. Articles hung upon the hooks should be tied in paper bags. It is well to have the cellar ceiled, to keep out the dust of the house and reduce the risk of fire. Here, of course, is the natural place for the coal-bin, and, when there are no out-buildings, the man's workshop. The laundry may also be placed in the cellar, and, in stormy weather, the clothes hung there to dry. In the country the cellar is a good place in which to build an ice-vault.