Book 1
3
The body is rendered humid: by more than customary exertion, by a frequent bath, by food in increased amount, by copious drinking, followed by walking and late hours; much walking, early and forced, has by itself the same effect, food being taken not immediately after exercise; so also those classes of edibles which come from cold and rainy and irrigated localities. On the contrary the body is dried: by moderate exercise, hunger, anointing without the addition of water, summer heat with moderate exposure to the sun, cold water to drink, food immediately after exercise, and all edibles coming from hot and dry districts.
3
The bowels are confined by exertion, by sitting still, by besmearing the body with potter's clay, by a scanty diet, and that taken once a day in the case of one accustomed to two meals, by drinking little and that only after the consumption of whatever food is to be taken, also by rest after food. On the contrary they are rendered loose: by increasing the length of the walk, more food and drink; by moving about after the meal; by frequently drinking during the meal. This too should be recognized, that a vomit confines the bowels when relaxed, and relaxes them when costive: again, a vomit immediately after the meal confines the bowels, later it relaxes them.
