3. Food should be taken always in the sitting position. There should be no riding nor walking, nor movements of the body until digestion is finished. The man who takes a walk or any strenuous occupation immediately after eating subjects himself to serious dangers of disease.
4. Day and night should be divided into twenty-four hours. Men should sleep for eight hours, and so arrange their sleep that the end of it comes with the dawn, so that from the beginning of sleep until sunrise there should be an eight-hour interval. We should all leave our beds about the time that the sun rises.
5. During sleep a man should lie neither on his face nor on his back but on his side, the beginning of the night on his left and at the end on his right. He should not go to sleep for three or four hours after eating and should not sleep during the day.
6. Fruits that are laxative, as grapes, figs, melons, gourds, should be taken only before meal time and not mixed with other food. It would be better to let these get into the abdominal organs and then take other food.
7. Eat what is easily digestible before what is difficult of digestion. The flesh of birds before beef and the flesh of calves before that of cows and steers. (Birds were then thought more digestible than other flesh; we have reversed the ruling. The note shows how light and digestible their flesh was considered and the reason therefor.)
8. In summer eat cooling food, acids, and no spices. In winter, on the contrary, eat warming foods, rich in spices, mustard, and other heating substances. In cold and warm climates one should eat according to the climatic conditions.
9. There are certain harmful foods that should be avoided. Large salt fish, old cheese, old pickled meat, young new wine, evil-smelling and bitter foods are often poisonous. There are also some which are less harmful, but are not to be recommended as ordinary nutritive materials. Large fish, cheese, milk more than twenty-four hours after milking, the flesh of old oxen, beans, peas, unleavened bread, sauerkraut, onions, radishes and the like. These are to be taken only in small quantities and only in the winter time and they should be avoided in the summer. Beans and lentils are to be recommended neither in winter nor summer.
10. As a rule one should avoid the eating of tree fruits, or not eat much of them, especially when they are dry and even less when they are green. If they are unripe they may cause serious damage. Johannesbrod is very harmful at all times, as are also all the sour fruits, and only small amounts of them should be eaten in summer or in warm countries.
11. The fruits that are to be recommended dry as well as fresh, are figs, grapes, and almonds. These may be eaten as one has the appetite for them, but one should not accustom himself to eat them much, though they are healthier than all other fruits.
12. Honey and wine are not good for children, though they are beneficial for older people, especially in winter. In summer one-third less of them should be eaten than in winter.