Habitual mouth breathing is one of the causes of the hardening and toughening of the mucous membrane of the respiratory passages, for the mouth does not arrest the irritating substances floating in the air, nor does it sufficiently warm and moisten the inspired air. Irritation produces inflammation and this in turn causes thickening of the membranes. Then it is very easy to acquire some troublesome affliction such as asthma. Very cold air is irritating, but the passage through the nose warms it sufficiently.

The evil results of mouth breathing are well seen in children, in whom it raises the roof of the mouth and brings the lateral teeth too close together. Then the dentists have to correct the deformity and the children are forced to suffer protracted inconvenience. This mouth breathing is mostly due to wrong feeding, especially overfeeding, which causes swelling of the mucous membrane, thus impeding the intake of the air through the nose and forcing it through the mouth. The chief curative measure is obvious. Cut down the child's food supply and give food of better quality. Remember that children should not be fat.

Normal breathing is rhythmical, with a slight rise of the abdomen and chest during inspiration and a slight falling during expiration. Watch a sleeping baby, and you will understand what is meant. The ratio of breathing to the beating of the heart is about one to four or five. Whatever accelerates the heart causes more rapid breathing and vice versa. Breathing is practically automatic, and were we living under natural conditions we should need to pay no attention to it, but inasmuch as our mode of life prevents the full use of the lungs a little intelligent consideration is necessary to attain full efficiency.

The body should be left as free as possible by the clothes and especially is this true of the chest and waist line. Women sin much against themselves in this respect. Most of them find it absolutely necessary for their mental welfare to constrict the lower part of the chest and the waist line a great part of the time, for really it would not do to be out of fashion. The statue of Venus de Milo is generally considered to represent the highest form of female beauty and perfection in sculptural art. If living women would consent to remain beautiful, instead of being slaves to fashion, it would be much better for themselves and for the race. A corseted woman can not breathe properly, even if she can introduce her hand between the body and her corset to prove that she is not constricted. The natural curves of women are more graceful than those produced by the corset. It would be an easy matter to give the breasts sufficient support, if they need support, without constricting the body, and then take enough exercise to keep the waist and abdomen firm and in shape to accord with a normal sense of what is beautiful and proper.

Woman does right in being as good looking as possible, and it would do man no harm to imitate her in this, for truly, "Beauty is its own excuse for being." But beauty and fashion seldom go hand in hand. Look at the modes which were the fashion, and you will be compelled to say that many of them are offensive to people of good taste. American women should cease imitating the caprice of the women of the underworld of Paris. There are indications that women are liberating themselves somewhat from the chains of fashions, as well as from other ridiculous things, so let us hope that they will soon be brave enough to look as beautiful as nature allows them to be, both in face and figure.

The lungs, like every other part of the body, become weakened when not used. The chest cavity enlarges during inspiration, but this enlargement is prevented if there is constriction of the lower ribs and the waist. The normal breathing is abdominal. Such breathing is health-imparting. It massages the liver gently with each breath and is mildly tonic to the stomach and the bowels. It truly gives internal exercise. It helps to prevent constipation.

Shallow breathing causes degeneration of lung tissue, and indirectly degeneration of every tissue in the body, for it deprives the blood of enough oxygen to maintain health. It also prevents the internal exercise of the abdominal organs, which is a necessary activity of the normal organism. Shallow breathers only use the upper parts of the lungs. It is not to be wondered at that the lower parts easily degenerate. In pneumonia, for instance, the lower part is usually first affected, and in tuberculosis one often can get the physical indications in the lower part of the lungs posteriorly before they can be found any other place. The upper parts have to be used and consequently they get more exercise and more blood and hence become more resistant. It is well known that when the upper part of the lungs become affected the disease is very grave.

Men, as well as women, are guilty of shallow breathing. Many men are very inactive and their breathing becomes sluggish. This can be remedied by taking vigorous exercise and a few breathing exercises. Because abdominal breathing is the correct way, some physical culturists, who mix the so-called New Thought with their system, advocate exercising and concentrating the mind on the abdomen at the same time. This is unnecessary, for the proper exercises and the right attitude will cause abdominal breathing without giving the abdomen special thought.

Man was evidently intended to earn his food through physical exertion and exercise, and so long as he did this the lungs were compelled to expand. A few running exercises or hill or mountain climbs will suffice to prove the truth of this statement. However, now that man can ride on a street car and earn, or at least get, his daily bread by sitting in an office, it is necessary to exercise a little in order to get good results. The farmer who sits crouched up on a plow, mower or binder also fails to use his lungs, but if he gets out and pitches hay or bundles of grain, he is sure to get what oxygen he needs.

Everyone should get into the habit of breathing deeply several times a day. Upon rising in the morning, go to the open window or out of doors and take at least a dozen slow, deep breaths, inhaling slowly, holding the air in the lungs a few moments and exhaling slowly. This should be repeated noon and night. Every time when one is in the fresh air, it is well to take a few full breaths. By and by the proper breathing will become a habit, to the great benefit of one's health.