Sewer gas is not the only evil to be guarded against, but it is the greatest. It is also the subtlest, for in some of its most deadly forms it is inodorous, and usually does its work before we become conscious of its existence. The poisonous gas is not necessarily generated in the sewer, but may be created anywhere in the pipes that obstructions or uneven surfaces permit filth to accumulate. If, however, the plumbing is modern and of substantial quality to begin with, has stood all the tests, and is accessible and fairly well understood by at least one member of the household, reasonable vigilance will obviate practically all worry about sewer gas. BATHROOM LOCATION AND FURNISHING Usually the bathroom is placed in a central location on the second floor, accessible, if possible, by both rear and front stairways. In a small house the upper floor is always advisable, as the bathroom should be well retired from the living quarters. Where the space can be spared, there should be a closet, however, on the main floor, or at least in the basement, where it will be readily accessible from the back part of the house. If the bathtub is popular with the household, it is in constant use, and for this reason the closet is in some cases cut off from it, and is reached by a separate door. [Illustration: The bathroom.] The principal thought being to eliminate anything which will retain water, tile or rubber flooring is preeminently best for the bathroom. If wood is substituted, it should be oak or maple, thoroughly oiled. Nothing should rest upon the floor to prevent any portion of the surface from being thoroughly cleaned. A tile wainscoting is almost indispensable. Paper will not stand steam and moisture, and calcimine is scarcely better. Canvas or burlap above a four- or five-foot wainscoting makes an attractive combination. All-white is not called for, but light tints of green, buff, or terra cotta will give a softening touch of color without destroying the general effect of immaculateness. Art glass in the window can scarcely fail to add to the attractiveness of the room. It may be had for from 75 cents to $3.50 per square foot. A rug is an essential, but it should be of a sort that will not readily absorb and retain water. Speaking of the window, it must be observed that outdoor ventilation, without disturbing privacy, should be made possible. Often a bathroom becomes quite suffocating, and with weakly persons the danger of being overcome in a locked room is not to be left out of consideration. THE TUB