Dreams and their interpretation are also discussed in the Physionomia.[1070] The age of the dreamer, the phase of the moon, and the stage reached in the process of digestion, all have their bearing upon interpretation. A dream which occurs before the process of digestion has started either has no significance or concerns the past. The dream which comes while the food is being digested has to do with the present. Only when the process of digestion has been completed do dreams occur which signify concerning the future. In order to recall a dream in the morning Michael recommends sleeping upon one’s other side for the remainder of the night or rubbing the back of the head the next day. Some dreams signify gain, others loss; some joy, others sadness; some sickness, others health, others war; some labor, others rest. For instance, to catch a bird signifies gain, to lose a bird in one’s dream signifies loss; to mourn in dreams portends joy, to laugh indicates grief. The rest of his discussion of dreams Scot limits to their significance in matters of health and physical constitution. He takes up dreams indicative of predominance of blood, red cholera, phlegm, and melancholy respectively; of heat, cold, dryness, and humidity; of excess of humors and of bad humors.
Works of divination ascribed to Michael Scot.
While on the subject of divination we may note that a geomancy[1071] and a chiromancy[1072] have been ascribed to Michael Scot, and also prophetic verses concerning the fate of Italian cities in the style of the Sibylline verses and prophecies of Merlin. Brown held that the evidence for the authenticity of these verses was as convincing as that for any event in Scot’s life.[1073]
Medical writings.
It would not be surprising to find that Michael himself practiced medicine as well as astrology, in view of the attention given to human physiology and the process of generation in his Physiognomy and elsewhere, and the interest in biology which his translation of the Aristotelian works on animals evidences. A treatise on prognostication from the urine is ascribed to him[1074] and “Pills of Master Michael Scot” are mentioned in at least one manuscript,[1075] where they are declared to be good for all diseases and of virtue indescribable.
Occult virtues.
Michael’s general allusion to the occult virtue of words, herbs, and stones in the Liber introductorius may be supplemented by a few specific examples of the same from the other two divisions of his main work. In the Liber particularis he mentions such virtues of stones as the property of the agate to reveal various signs of demons and illusions of enchantment, and the power of the jasper to render its bearer rich, amiable, and eloquent.[1076] In the Phisionomia he suggests that persons who cannot maintain physical health without frequent sexual intercourse may be able to do so by carrying a jasper or topaz.[1077] He also states that bathing in the blood of a dog or of two-year-old infants mixed with hot water “undoubtedly cures leprosy,”[1078] and that many sorceries can be wrought by use of the menstrual fluid, semen, hairs of the head, blood, and footprints in dust or mud.[1079]
Astrology in the Commentary on the Sphere.
Michael Scot’s Commentary upon the Sphere of Sacrobosco[1080] confines itself rather more strictly to astronomical and astrological topics than did the Liber introductorius, but otherwise their contents are not dissimilar. In the Commentary Michael discusses such questions as whether the universe is eternal, one or many, and what form or figure it should have; whether the mover of the sky is moved, whether the stars are spherical bodies, and whether the zone between the tropic of Capricorn and the Antarctic Circle is temperate and inhabited. Also whether the elements are four in number, and whether the heavens include a ninth sphere. One argument against its existence is that there are no stars in it, on which account some hold that it would exert no influence upon the earth. But Michael replies that it has light apart from any starry bodies and by virtue of this light does exert influence. Other astrological questions which he raises are whether the signs of the zodiac should be designated by the names of animals, whether the first heaven is a more potent cause of generation and corruption than the circle of the zodiac is, whether celestial bodies have particular properties as terrestrial bodies do, whether the heavens are animate, whether their motion is natural or voluntary, whether the motion of the planets is rational, and whether supercelestial bodies act upon inferiors by virtue of their motion. In mentioning the departments of life over which the seven planets rule, Michael cites either theologians or astrologers[1081] to the effect that Saturn signifies concerning pagans, Jews, and all other adversaries of the Faith, who are slow to believe just as Saturn is slow of movement and chilling in effect, while Jupiter is the sign of true believers and Christians.
Dionysius the Areopagite and the solar eclipse during Christ’s passion.