A commentator on Aristotle, writing in the 4th centur y 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, at a somewhat later time, the word chemia as the name of that art which deals with calcinations, fusions, meltings, and the like. The writer of a treatise on astrology, in the 5th centur y, speaking of the influences of the stars on the dispositions of man, says: If a man
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