=Symptoms.= The symptoms consist in abundant salivation with discharge from the mouth, suggesting the existence of foot-and-mouth disease. In grave cases the saliva appears streaked with blood, even from the beginning. The buccal cavity exhales an intense fœtid odour which, during the following days, becomes more marked; the mucous membrane is pale in colour, and coated with a greyish exudate. The mouth is hot and sensitive, the gums are swollen, reddish-violet in colour, and painful. Alveolar periostitis soon sets in, the teeth become loose, and mastication is rendered impossible, especially as the inflammation causes the tongue to swell and lose its mobility. These symptoms are unaccompanied by fever. In the last stage ulcerations and local necroses appear on the gums, on the inner surface of the lips and cheeks, and around the commissures of the lips. The patients are almost unable to feed, rapidly lose flesh, become anæmic, and die from septic infection. The temperature is often below normal. A toxi-infectious gastro-enteritis, with fœtid, blood-stained diarrhœa, is grafted on the primary stomatitis. Complications in connection with the respiratory, circulatory, and urinary apparatus appear, and the patients die in a condition of absolute exhaustion. Naturally this termination is not inevitable; trifling cases of poisoning, and even grave forms, when properly treated, may, and should, recover. =Diagnosis.= The diagnosis is mainly based on the history, except in cases of accidental and unsuspected poisoning. =Prognosis.= The prognosis is grave, for even when the disease does not prove fatal the animals remain anæmic and exhausted for long periods. =Treatment= should principally be directed towards combatting the local complications. When poisoning is due to external applications of mercury or its salts the skin should be washed with soap and water, and afterwards dressed with a soluble sulphide, which renders the mercury insoluble. The mouth should frequently be rinsed with boiled water, with decoctions of barley or marsh-mallow, with a 30 per cent. solution of boric acid or alum, or with a 1 to 2 per cent. solution of salicylic acid. Fully grown cattle receive daily doses of 1¼ to 2 drams of chlorate of potash internally. This drug appears to owe its favourable action to the fact that it is partly eliminated by the salivary glands. Lastly, with the idea (which may, perhaps, be illusory) of minimising and checking the bad effects of the mercury introduced into the body, certain practitioners have recommended the administration of eggs, flowers of sulphur (2½ to 5 drams), sulphate of iron (1¼ to 2½ drams), and of iodide of potassium (1¼ to 2½ drams), drugs which are alleged to form insoluble compounds with mercury. GLOSSITIS.