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 which Freind renders oil of eggs, and Sprengel calls oil of dates. Avenzoar says his father brought it from the East, and that it was a marvellous lithontryptic. He tells how mastic corrects scammony, and sweet almonds colocynth. He is the earliest writer to refer to the medicinal virtues of the bezoar stones. He gives a different account of the origin of these stones from that of other authors. The best, he says, comes from the East and is got from the eyes of stags. The stags eat serpents to make them strong, and at once to prevent any injury their instinct impels them to run into streams and stand in the water up to their necks. They do not drink any water. If they did they would die immediately; but standing in the stream gradually reduces the force of the poison, and then a liquor exudes by the eyelids which coagulates and forms a stone which may grow to the size of a chestnut, which ultimately falls off. According to another Arab author, Abdalanarack, the bezoar stone acquired such a celebrity in Spain that a palace in Cordova was given in exchange for one.

Moses Maimonides, the most famous Jewish scholar and theologian of the middle ages, must be mentioned among the exponents of Arab pharmacy. He was born at Cordova in 1139, and studied medicine under Averrhoes, but when he was twenty-five the then Mohammedan ruler of Spain required him to be converted or quit the kingdom. Maimonides therefore went to Cairo, and became physician to Saladin, the well-known hero of Crusade wars, who was then Sultan of Egypt. Among his duties he had to superintend the preparation of theriaca and mithridatium for the Court. The drugs for these compounds, Maimonides says, had to be brought from the East and the West at great