Why the flame of fire takes the figure of a pyramid?
Why are springs hot in winter and cold in summer?
Should an interval elapse between the courses of a meal?
Should drink be taken along with one’s food?
Should the heartier meal be at mid-day or in the evening?
Why are other animals than man content with one form of food?
Why does human urine enrich vines?
Should fruit be plucked ripe or green?
Are apples good in fevers?
Why is wine (cider) made from apples?