First of all, as that on which every moment of life is dependent we ought to consider air and its relation to the appearance. Oxygen has been called the “sweeper of the living body.” Every two minutes the blood loaded with wastes is brought to the lungs to be purified. Just think how important it is that the air be absolutely fresh and pure, and vitalized by the sunshine. If it has been vitiated from any cause, as by rebreathing so that it is lacking in oxygen and full of impurities, the blood, instead of being purified and vivified, is sent back, with but a part of its waste removed, impaired, and becoming more and more devitalized and poisoned from the breathing of the impure air. The whole system suffers from the effects of the bad air. =Effects of foul air.=--During every moment in which impure air is breathed, uncleanliness is fostered within the body, and even if disease in acute or chronic form does not follow, the whole bodily tone is greatly lowered. Just what opportunity attractiveness has to develop in such a body is apparent. The eyes are dull, the complexion muddy, and scarcely in any way does the appearance escape deterioration. Yet it is so uncommon for the air of our dwelling and working places to be pure, as to be a treat when it is obtained. It is true that the average girl or woman cannot control the conditions in her place of work, but she can in her home, or at any rate in her own room, and sleeping or waking, she should have her room thoroughly ventilated.