A vomit is more useful in the winter than summer, because in that season there is more phlegm, and a greater heaviness in the head. It does no good to those, that are slender, and have a weak stomach; but it is useful to those, that are of a full habit, and all bilious people, if they have either overloaded themselves, or their concoction has been impaired: for if they have taken a greater quantity than can be concocted, they ought not to run the risk of its corrupting; or if it is already corrupted, nothing is more proper than to have it expelled in the most expeditious way possible. For this reason, whenever they are attacked with bitter eructations, attended with pain and weight of the præcordia, they must immediately have recourse to this remedy. It is likewise proper for one, who has a scorching heat in the breast, and a frequent spitting or a nausea, or for one who has noise in his ears, or a humour in the eyes, or a bitterness in the mouth; as also for one, who changes either his air or situation, and to those, who are troubled with a pain of the præcordia, if they have not vomited for several days. I am sensible, that in these cases rest is prescribed, which cannot always be had by those, who are under a necessity of stirring about; nor indeed has it the same effect in every body. I grant then, that vomits should not be taken with a view of indulging the luxurious appetite: that they are sometimes useful remedies, I believe upon the credit of experience; but I would advise any, who wishes to be healthy, and live to old age, not to make a daily practice of it. When one chuses to vomit after meat, if he does it easily, he should first drink only warm water; if with difficulty, let him add a little salt or honey to the water; but he, that intends to vomit in the morning, should first drink mulse(24), or eat hyssop(25), or radish, and then drink warm water, as has been directed already. All the other things which the ancient physicians prescribed, are hurtful to the stomach. If it is weak after the vomit, a little food is to be taken, but of a proper kind; and if the fauces have been much irritated, three cyathi of cold water may be drunk. He, that has vomited, if it was in the morning, ought to take a walk, then anoint, afterwards sup; but if after supper, on the following day he should bathe, and sweat in the bagnio; he will do well to make the next meal slight, and the bread he uses at it should be stale, wine austere and unmixed, the flesh roasted, and all the food of the driest kind. He that chuses to vomit twice in the month, will find it answer the purpose better, if he do it for two days successively, than if he were to repeat it on the fifteenth day, unless such an intermission should cause a weight at his breast. [Sidenote: _Of purging._]