Why does melancholy especially excite the appetite?
Why do the boxwood, white-fir, and laurel trees retain their foliage a longer time than others?
Why in the boxwood, laurel, and olive are the leaves pointed, in the poplar and other trees wide?
Is it beneficial to strew myrtle leaves in the sick-room?
Why is oil best at the top, honey at the bottom, wine in the middle of the cask?
Are fungi plants or something between earth and plants?
Why the weasel seeks rue and rubs itself with it when it intends to fight a snake?
Why pepper is good for dimmed eyes?
Why the water in the sea does not grow less?
Why the horse, mule, and ass neither nourish man nor harm him, if he eats them?[1669]