The system which began to be called alchemy in the 6th and 7th centuries of our era had no special name before that time, but was known as the sacred art, the divine science, the occult science, the art of Hermes. A commentator on Aristotle, writing in the 4th century A.D., calls certain instruments used for fusion and calcination "chuika organa," that is, instruments for melting and pouring. Hence, probably, came the adjective chyic or chymic, and,...