Parva Naturalia [the "short treatises on nature" (a conventional Latin title first used by Giles of Rome)] is a collection of books by Aristotle, which discuss natural phenomena involving the body and the soul. The books are as follows: I - On Sensation and the Sensible II - On Memory and Recollection III - On Sleeping and Waking IV - On Dreams V - On Prophecy in Sleep VI - On Longevity and Shortness of Life VII - On Youth and Old Age, Life and Death VIII - On Respiration ( Summary Adapted from Wikipedia )