The Arabians agree with the Greeks in representing the disease as being produced by black bile. They were, no doubt, led to form this opinion from remarking that the blood in the part is thick and black, which they considered owing to its not being properly purged of its recrementitious sediment. The moderns deride this theory, but they have substituted nothing satisfactory in its stead. Van Swieten thinks more favorably of the ancient doctrines. (Comment. § 485.) Avicenna speaks highly of a milk diet. Serapion likewise approves of milk deprived of its butter, and of a vegetable diet. He speaks of no other treatment as being likely to prove remediable, with the exception of excision and the cautery. Haly Abbas rather approves of excision when the disease is seated in a part which admits of this operation. However, like Galen, he disapproves of tying the arteries. The characteristic symptoms of the disease, he says, are a stony hardness and distension. The account given by Alsaharavius is nothing different. Rhases has little confidence in excision. After ulceration has taken place he approves of using a cooling application, containing ceruse, tutty, rose-oil, the juice of nightshade, and some other such things of a cold nature. He mentions a case of cancer of the breast, in which the whole mamma was extirpated, but the disease returned on the other side. One of his authorities, Antyllus, describes the cancerous sore as having a tendency to spread inwards, its edges being thick, large, and everted, and the discharge thin and acrid. When the disease cannot be got completely extirpated, he forbids us to meddle with it. Theodoricus and all the earlier modern writers on medicine, call the cancer by the name of apostema melancholicum, and recommend the same treatment for it as the Greeks and Arabians. SECT. XXVII.—ON ŒDEMA.