3. _Ye-tong._ Is also produced by chill. The gums are red and swollen; there is no discharge of mucus; great pain, which is aggravated by cold liquids. If the malady lasts for some time, the gums end by becoming black, and the teeth are loosened; the pain becomes more intense in spitting. In this stage of the malady the sufferer no longer fears cold drinks, but rather desires them, to soothe the pain. The cure varies according to whether the malady be of recent or of old date; it consists in the use of internal remedies (pills, potions), or of frictions on the part where the pain is situated. 4. _Han-tong._ This is also owing to the action of the cold. Pains in the cheek and forehead proceeding from the teeth; no diseased condition either of the gums or of the alveoli. 5. _Tou-tan-tong._ Violent cough and toothache at the same time; difficulty in masticating. 6. _Yn-hiue-tong._ The gums are pale, or violet-red, hard and lumpy, sometimes bleeding; the toothache is continuous. Among the numerous remedies recommended against this malady (mouth washes, frictions, draughts, pills), one particularly deserves mention: it is the urine of a child used as a mouth wash. 7. _Tchong-che-tong._ Pain in the teeth after mastication; there is also sometimes excoriation of the gums; flow of purulent mucus mixed with blood; bad-smelling breath; the tooth falls; it is decayed, and one can perfectly well distinguish a small hole; the root is unsound; in extracting the tooth one sometimes brings away together with it a little white worm, with a black spot on the head, which can be distinguished by the aid of a magnifying glass. A remedy must immediately be administered to destroy these worms, otherwise the patient runs the risk of having his other teeth attacked in the same manner, and of their falling out. The remedies against this affection are most numerous, and belong for the most part to the oftentimes cited categories. One of them presents a certain interest, its basis being arsenic. In Dabry’s book it is described in the following manner: “Arsenic (gr. 1.80), _houang-tan_ (gr. 3.60); pulverize, mix with water, and with a part of the mass form a small pill, which put close to the aching tooth or into the ear, if afraid of the arsenic; then sleep. Cure certain.” 8. Toothache, the effect of general weakness, following principally on abuse of coition. It is to be cured by the use of internal medicine, or by local remedies to be rubbed on the painful spot. Some of the medicaments registered in this paragraph have reference to the special case, in which the teeth are loosened through excess of coition. Among others there is a prescription for a dentifrice powder for strengthening the teeth, to be used every morning.