205. SCIENCE AND MAGIC
SCIENTIFIC INVENTIONS
Not all medieval learning took the form of scholasticism. The twelfth and thirteenth centuries were marked by a healthy interest in science. Long encyclopedias, written in Latin, collected all available information about the natural world. The study of physics made conspicuous progress, partly as a result of Arab influence. Various scientific inventions, including magnifying glasses and clocks, were worked out. The mariner's compass, perhaps derived from the Arabs, also came into general use. [25]
ROGER BACON, ABOUT 1214-1294 A.D.
As representative of this scientific interest we may take the Englishman, Roger Bacon. He studied at Paris, where his attainments secured for him the title of the "Wonderful Doctor," and lectured at Oxford. At a period when Aristotle's influence was unbounded, Bacon turned away from scholastic philosophy to mathematics and the sciences. No great discoveries were made by him, but it is interesting to read a passage in one of his works where some modern inventions are distinctly foreseen. In time, he wrote, ships will be moved without rowers, and carriages will be propelled without animals to draw them. Machines for flying will also be constructed, "wherein a man sits revolving some engine by which artificial wings are made to beat the air like a flying bird." Even in Bacon's day it would appear that men were trying to make steamboats, automobiles, and aëroplanes.
[Illustration: ROGER BACON]
GUNPOWDER
The discovery of gunpowder, a compound of saltpeter, charcoal, and sulphur, has often been attributed to Bacon, probably incorrectly. Bacon and other men of his time seem to have been familiar with the composition of gunpowder, but they regarded it as merely a sort of firework, producing a sudden and brilliant flame. They little suspected that in a confined space the expansive power of its gases could be used to hurl projectiles. Gunpowder was occasionally manufactured during the fourteenth century, but for a long time it made more noise than it did harm. Small brass cannon, throwing stone balls, began at length to displace the medieval siege weapons, and still later muskets took the place of the bow, the cross-bow, and the pike. The revolution in the art of warfare introduced by gunpowder had vast importance. It destroyed the usefulness of the castle and enabled the peasant to fight the mailed knight on equal terms. Gunpowder, accordingly, must be included among the forces which brought about the downfall of feudalism.
CHEMISTRY AND ALCHEMY
The study of chemistry also engaged the attention of medieval investigators. It was, however, much mixed up with alchemy, a false science which the Middle Ages had received from the Greeks, and they, in turn, from the Egyptians. The alchemists believed that minerals possessed a real life of their own and that they were continually developing in the ground toward the state of gold, the perfect metal. It was necessary, therefore, to discover the "philosopher's stone," which would turn all metals into gold. The alchemists never found it, but they learned a good deal about the various metals and discovered a number of compounds and colors. In this way alchemy contributed to the advance of chemistry.
ASTRONOMY AND ASTROLOGY
Astronomy in the Middle Ages was the most advanced of any natural science, though the telescope and the Copernican theory [26] were as yet in the future. Astronomy, the wise mother, had a foolish daughter, astrology, the origin of which can be traced back to Babylonia. [27] Medieval students no longer regarded the stars as divine, but they believed that the natural world and the life of men were controlled by celestial influences. Hence astrologers professed to predict the fate of a person from the position of the planets at the time of his birth. Astrological rules were also drawn from the signs of the zodiac. A child born under the sign of the Lion will be courageous; one born under the Crab will not go forward well in life; one born under the Waterman will probably be drowned, and so forth. Such fancies seem absurd enough, but in the Middle Ages educated people entertained them.
MEDIEVAL CREDULITY
Alchemy and astrology were not the only instances of medieval credulity. The most improbable stories found ready acceptance. Roger Bacon, for instance, thought that "flying dragons" still existed in Europe and that eating their flesh lengthened human life. Works on natural history soberly described the lizard-like salamander, which dwelt in fire, and the phoenix, a bird which, after living for five hundred years, burned itself to death and then rose again full grown from the ashes. Another fabulous creature was the unicorn, with the head and body of a horse, the hind legs of an antelope, the beard of a goat, and a long, sharp horn set in the middle of the forehead. Various plants and minerals were also credited with marvelous powers. Thus, the nasturtium, used as a liniment, would keep one's hair from falling out, and the sapphire, when powdered and mixed with milk, would heal ulcers and cure headache. Such quaint beliefs linger to-day among uneducated people, even in civilized lands.
[Illustration: MAGICIAN RESCUED FROM THE DEVIL
Miniature in a thirteenth-century manuscript in the Bibliothèque
Nationale, Paris. The Devil, attempting to seize a magician who had formed
a pact with him, is prevented by a lay brother.]
MAGICIANS
Magicians of every sort flourished in the Middle Ages. Oneiromancers [28] took omens from dreams. Palmists read fortunes in the lines and irregularities of the hand. Necromancers [29] professed to reveal the future by pretended communications with departed spirits. Other magicians made talismans or lucky objects to be worn on the person, mirrors in which the images of the dead or the absent were reflected, and various powders which, when mixed with food or drink, would inspire hatred or affection in the one consuming them. Indeed, it would be easy to draw up a long list of the devices by which practitioners of magic made a living at the expense of the ignorant and the superstitious.