Now every ignis sacer, though it be the least dangerous of those disorders, which have the disposition to spread, yet is, I had almost said, the hardest to cure of them all. The most effectual remedy is a fever for one day, which consumes the noxious humour. The thicker and whiter the pus is, so much the less is the danger. It does good also to excoriate the part below the ulcer by scourging, that the more pus may be evacuated, and the matter drawn out, which corrupts the flesh there. But notwithstanding if a slight fever comes on, there is a necessity for abstinence, lying a-bed, and clysters. In every ignis sacer, neither mild and glutinous food, nor salt and acrid are proper; but what is betwixt these: such as unleavened bread, fish, kid, birds, and except the wild boar, almost all venison. If there is no febricula, both gestation and walking are serviceable, and rough wine, and the bath; and in this disorder, as well as that mentioned before, the drink ought to be more plentiful than the food. As for the ulcers themselves, if their progress be moderate, they must be fomented with hot water; if more rapid, with hot wine. Next wherever there are any pustules, they must be opened with a needle. Then such applications used, as may consume the putrid flesh. When the inflammation is removed, and the ulcer cleansed, a lenient medicine ought to be applied. In the second species, quinces boiled in wine and bruised may do good; as likewise the plaister of Hera, or the tetrapharmacum, with the addition of a fifth part of frankincense; likewise black ivy boiled in a rough wine, and if the disorder spread fast, nothing is more efficacious. When the ulcer, which I observed to be in the surface of the skin, is cleansed, the same lenient medicines are sufficient to the cure. [Sidenote: _Of the Chironian ulcer._] The ulcer named Chironian(83) is large, and has hard, callous, and swelled lips. A sanies is discharged not copious, but thin; the smell is bad. There is no inflammation either in the ulcer or in the tumour about it. The pain is tolerable. It does not spread, and therefore is not dangerous; but it does not easily heal. Sometimes a thin cicatrix comes on, and then breaks again, and the ulcer is renewed. It occurs chiefly in the feet and legs. The application to it ought to contain both something lenient, and something strong, and repellent. Such as the following composition made for the purpose: of copper scales, calcined lead washed, each p. vi. *. cadmia, wax, each p. viii. *. oil of roses a sufficient quantity to soften the wax with the other ingredients. [Sidenote: _Of ulcers occasioned by cold._]