If a person has eaten poisonous mushrooms, let him take radish either out of vinegar and water, or salt and vinegar. These may both be distinguished from the good by their form, and also be rendered innocent by the manner of dressing. For they are perfectly freed from all noxious qualities, by boiling them in oil, or with a twig of a pear-tree. [Sidenote: _Of burns._] Burns are also to be reckoned amongst the effects of external violence. The plan laid down, therefore, seems to oblige me to speak of them in this place. They are best cured by the leaves either of lilly, or hound’s-tongue, or betes boiled in wine and oil. Any of these presently applied heals them. But the method of cure may also be divided into those things, which being gently eating and repellent, at first both prevent pustules, and excoriate the part; and those, which being lenient, restore the part to its soundness. Of the former is the meal of lentils with honey, or myrrh with wine; or Cimolian chalk, powdered with the bark of frankincense, and worked up to a paste with water, and when it is to be used, diluted with vinegar. Of the second class any of the lipara. But the most suitable is that, which contains the dross of lead, or yolks of eggs. Another way also of treating burns is, while the inflammation continues, to apply to them lentils with honey; when that is gone off, meal with rue, or leeks, or horehound, till the crusts fall off, then vetches with honey, or iris, or turpentine resin, till the ulcer be clean; last of all, dry lint. CHAP. XXVIII. OF EXTERNAL DISORDERS PROCEEDING FROM AN INTERNAL CAUSE, AND THEIR CURE. [Sidenote: _Of a carbuncle._] From external injuries, we proceed to disorders which have an internal origin, when some part of the body is corrupted. Amongst these none is worse than a carbuncle. The marks of it are these. There is a redness, and above that pustules rise, not very high, mostly black, sometimes inclining to a livid colour, or pale. There seems to be sanies in them; below, the colour is black. The flesh is parched, and harder than it ought to be naturally. And about it, there is a sort of crust; which is surrounded with an inflammation. Neither can the skin be lifted up in that place, but is, as it were, bound down to the flesh below. There is a propensity to sleep. Sometimes a shuddering, or fever comes on, or both. And this disease shoots out roots, as it were, below, and spreads, sometimes quickly, sometimes more slowly. At the surface also it spreads and grows white; then becomes livid; and all round it small pustules break out. And if it happen to be near the gullet or fauces, it often stops the breath suddenly.