By no race was the practice of the occult arts studied with such perseverance as by the Moors of Spain, and it is strange indeed that only fragmentary notices of their works in this respect remain to us. The statement that they were famous for magical and alchemical studies is reiterated by numerous European historians, but the majority of these have refrained from any description of their methods, and the Moors themselves have left so few undoubted memorials of their labours in this direction that we remain in considerable ignorance of the trend of their efforts, so that if we desire any knowledge upon this most recondite subject we must perforce collect it painfully from the fragmentary notices of it in contemporary European and Arabic literature. The first name of importance which we encounter in the broken annals of Moorish occultism is a great one--that of the famous Geber, who flourished about 720-750, and who is reported to have penned upward of five hundred works upon the philosopher's stone and the elixir of life. In common with his fellow-alchemists, he appears to have failed signally in his search for those marvellous elements, but if he was unable to point the way to immortal life and boundless wealth, he is said to have given mankind the nitrate of silver, corrosive sublimate, and nitric acid. He believed that a preparation of gold would heal all diseases in both animals and plants, as well as in human beings, and that all metals were in a condition of chronic sickness in so far that they had departed from their natural and original state of gold. His works, all of which are in Latin, are not considered authentic, but his Summa Perfectionis, a manual for the alchemical student, has frequently been translated. The Moorish alchemists taught that all metals are composed of varying proportions of mercury and sulphur. They laboured strenuously to multiply drugs out of the various mixtures and reactions of the few chemicals at their disposal, but although they believed in the theory of transmutation of metals they did not strive to effect it. It belonged to their creed rather than to their practice. They were a school of scientific artisans and experimentalists, first and last. They probably owed their alchemical knowledge to Byzantium, which in turn had received it from Egypt; or it may be that the Arabs drew their scientific inspiration at first hand from the land of the Nile, where the 'great art' of alchemy undoubtedly had its birth. Astrology