ARISTES. Aristes, king of Arcadia, was another famous pupil of Chiron. He is credited with having introduced the silphion or laser which became a popular medicine and condiment with the ancients, and which was long believed to have been their name for asafœtida, but which modern authors have doubted, alleging that silphion was the product of Thapsia silphion. Aristes is further said to have taught the art of collecting honey and of cultivating the olive. MEDEA. Medea of Colchis is one of the most discussed ladies of mythical history. Euripides, Ovid, and other poets represented her for the purposes of their poems as a fiend of inhuman ferocity. Some more trustworthy historians believe that she was a princess who devoted a great deal of study to the medicinal virtues of the plants which grew in her country, and that she exercised her skill on the poor and sick of her country. Certainly the marvellous murders attributed to her must have been planned by a tragic poet to whom no conditions were impossible. Diodorus declares that the Corinthians stoned her and her sons, and afterwards paid Euripides five talents to justify their crime. Medea’s claim to a place in this section is the adopted theory that she discovered the poisonous properties of colchicum, which derived its name from her country. Colchis had the reputation of producing many poisonous plants; hence the Latin expression “venena Colchica.” MORPHEUS. Morpheus was, according to the Roman poets, the son or chief minister of the god of sleep (Somnus). The god himself was represented as living in Cimmerian darkness. Morpheus derived his name from Morphe, (Gr., form or shape), from his supposed ability to mimic or assume the form of any individual he desired to pose as in dreams. Thus Ovid relates how he appeared to Alcyone in a dream as her husband, who had been shipwrecked, and narrated to her all the circumstances of the tragedy. Morpheus is represented with a poppy plant in his hand bearing a capsule with which he was supposed to touch those whom he desired to put to sleep. He also had the wings of a butterfly to indicate his lightness. Sertürner adopted the term “morphium” as the name of the opium alkaloid which he had discovered. PYTHAGORAS.