6. Certain parts of the internal skin, as it covers particular organs, is peculiarly apt to pass into inflammation, and to terminate, like ordinary inflammation, in ulceration. The principal seats of inflammation are the throat and the larynx; but that, on the one hand, the inflammation extends from the throat into the stomach, is evident from the peculiar tenderness of the epigastrium, which is almost constant in scarlatina, and which is more acute than in ordinary fever; and that, on the other hand, it extends from the larynx into the bronchi and their ramifications, is evident from the symptoms of thoracic affection, which are at once more prominent and more constant than in the other forms of fever. The larynx, the cartilages of which are apt to be destroyed by ulceration, in the severe and mortal cases, is now and then attacked with a peculiar kind of laryngitis, to be further noticed in the pathology, which is almost uniformly and most rapidly fatal. 7. From the preceding observations, the new symptoms which are added to the febrile train in scarlatina, and which arise out of the modification of the fever by its complication with an inflammatory condition of the external and internal skin, are easily understood. They are the following: namely, Scarlet eruption on the skin; vivid and peculiar redness of the mouth, tongue, fauces and throat: the presence of the disease may usually be discovered by this peculiar and specific redness of the tongue and throat alone, although every other characteristic symptom were absent: pain in the throat, difficult deglutition, huskiness and hoarseness of the voice. To these must be added other symptoms, which, though they are sometimes present in ordinary fever, are both more constant and more severe in scarlatina than in the latter, namely, pain in the chest, cough, difficult and hurried respiration, duskiness, in severe cases lividness of the cheek, often, especially in the commencement of the attack, nausea and vomiting. Such are the chief peculiarities by which scarlet fever is distinguished: in all other respects the condition of the organs, and the symptoms which denote their disordered state are the same as in continued fever without an eruption. Scarlatina occurs under two forms.—1st, With the symptoms common to synochus, (scarlatina synochodes) a form which, however severe the symptoms, if properly treated, rarely proves fatal. In general, it is a trifling malady, and, when severe, its chief danger consists in its tendency to pass into the second form, if it be neglected, or if it be badly treated. Under the most formidable aspect it ever presents, if the active treatment, which, when the symptoms are severe, ought always to be employed, be resorted to with promptness and decision, in more than ninety cases out of a hundred, those symptoms are certainly and effectually subdued, and the disease, although it may not be cut short at once, is at once rendered mild and safe.