not always possible to locate the troublesome tooth, from the pain, but by tapping on the various teeth in turn with a knife, or other metal instrument, special soreness will be discovered in the "ulcerated" tooth. The ulcerated tooth frequently projects beyond its fellows, and so gives pain when the jaws are brought together in biting.

Treatment. The treatment for threatened abscess near a tooth consists in painting tincture of iodine, with a camel's hair brush, upon the gum at the root of the painful tooth, and applying, every hour or so, over the same spot a toothache plaster (sold by all druggists). The gum must be wiped dry before applying the moistened toothache plaster. Water, as hot as can be borne, should be held in the mouth, and the process repeated for as long a time as possible. Then the patient should lie with the painful side of the face upon a hot-water bag or bottle. The trouble may subside under this treatment, owing to disappearance of the inflammation, or to the unnoticed escape of a small amount of pus through a minute opening in the gum. If the inflammation continues the pain becomes intense and throbbing; there is often entire loss of sleep and rest, fever, and even chills, owing to a certain degree of blood poisoning. The gum and face swell on the painful side, and the patient often suffers more than with many more serious diseases.

After several days of distress, the bony socket of the tooth gives way, and the pus makes its exit, and,

bulging out the gum, finally escapes through this also, to the immediate relief of the patient. But serious results sometimes follow letting nature alone in such a case, as the pus from an eyetooth may burrow its way into the internal parts of the upper jaw, or into the chambers of the nose, while that from a back tooth often breaks through the skin on the face, leaving an ugly scar, or, if in the lower jaw, the pus may find its way between the muscles of the neck, and not come to the surface till it escapes through the skin above the collar bone. Pulling the tooth is the most effective way of relieving the condition, the only objection being the loss of the tooth, which is to be avoided if possible.

If the pain is bearable and there are no chills and fever, the patient may save the tooth by remaining in bed with a hot-water bottle continually on the face, and taking ten drops of laudanum to relieve the pain at intervals of several hours. Then many hours of suffering may be prevented if the gum is lanced with a sharp knife (previously boiled for five minutes) as soon as the gum becomes swollen, to allow of the escape of pus. The dentist is, of course, the proper person to consult in all cases of toothache, and the means herein suggested are to be followed only when it is impossible to obtain his services.

MOUTH-BREATHING (including Adenoids, Chronic Tonsilitis, Deviation of the Nasal Septum, Enlarged Turbinates, and Polypi).-Any obstruction

in the nose causes mouth-breathing and gives rise to one or more of a long train of unfortunate results. Among the disorders producing mouth-breathing, enlargement of the glandular tissue in the back of the nose and in the throat of children is most important. Glandular growths in the upper part of the throat opposite the back of the nasal cavities are known as "adenoids"; they often completely block the air passage at this point, so that breathing through the nose becomes difficult. Associated with this condition we usually see enlargement of the tonsils, two projecting bodies, one on either side of the entrance to the throat at the back of the mouth. In healthy adult throats the tonsils should be hardly visible; in children they are active glands and easily visible.

We are unable to see adenoids because of their position, but can be reasonably sure of their presence in children where we find symptoms resulting from mouth-breathing as described below. The surgeon assures himself positively of the existence of adenoids by inserting a finger into the mouth of the patient and hooking it up back of the roof of the mouth, when they may be felt as a soft mass filling the back of the nose passages.

Other less common causes of mouth-breathing, seen in adults as well as children, are deviation of the nasal septum, swelling of the mucous membrane covering certain bones in the nose (turbinates), and polypi.

Deviation of the nasal septum means displacement

of the partition dividing the two nostrils, so that more or less obstruction exists. This condition may be occasioned by blows on the nose received in the accidents common to childhood. The deformity which results leads in time to further obstruction in the nose, because when air is drawn in through the narrowed passages a certain degree of vacuum is produced and suction on the walls of the nose, as would occur if we drew in air from a large pair of bellows through a small thin rubber tube. This induces an overfilling of the blood vessels in the walls of the passages of the nose, and the continued congestion is followed by increased thickness of the lining mucous membrane, thus still further obstructing the entrance of air. A one-sided nasal obstruction in a child with discharge from that side leads one to suspect that a foreign body, as a shoe button, has been put in by the child.

Polypi are small pear-shaped growths which form on the membrane lining the nasal passages and sometimes completely block them. They resemble small grapes without skins.

These, then, are the usual causes of mouth-breathing, but of most importance, on account of their frequency and bearing on the health and development, are adenoids and enlarged throat tonsils in children. Adenoids and enlarged tonsils are often due to inflammation of these glands during the course of the contagious eruptive disorders, as scarlet fever, measles, or diphtheria; probably, also, to constant exposure to a germ

laden atmosphere, as in the case of children herded together in tenements.

Symptoms.-The mouth-breathing is more noticeable during sleep; snoring is common, and the breathing is of a snorting character with prolonged pauses. Children suffering from enlarged tonsils and adenoids are often backward in their studies, look dull, stupid, and even idiotic, and are often cross and sullen; the mouth remains open, and the lower lip is rolled down and prominent; the nose has a pinched aspect, and the roof of the mouth is high. Air drawn into the lungs should be first warmed and moistened by passing through the nose, but when inspired through the mouth, produces so much irritation of the throat and air passages that constant "colds," chronic catarrh of the throat, laryngitis, and bronchitis ensue.

The constant irritation of the throat occurring in mouth-breathers weakens the natural resistance against such diseases as acute tonsilitis, scarlet fever, and diphtheria, so that they are especially subject to these diseases. But these are not the only ailments to which the mouth-breather is liable, for earache and deafness naturally follow the catarrh, owing to obstruction of the Eustachian tubes (see Earache, p. 54, and Deafness, p. 52). Deformity of the chest is another result of obstruction to nose-breathing, the common form being the "pigeon breast," where the breastbone is unduly prominent. The voice is altered so that the patient, as the saying goes, "talks through the nose," although, in