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 were in connection with opium (from which he extracted codeine), on liquorice, cantharides, barytes, and nickel.

André Constant Dumeril (born at Amiens, 1774, died 1860) was a physician, but distinguished himself as a naturalist and anatomist. He had been associated with Cuvier in early life. Latterly he was consulting physician to Louis Philippe.

Antoine Louis Brongniart (born 1742, died 1804) was the son of a pharmacist of Paris, and became himself pharmacien to Louis XVI. He also served the Convention as a military pharmacist, and was placed on the Council of Health of the Army. In association with Hassenfratz who was one of the organisers of the insurrection of August 10th, 1792, and himself a professor at the School of Mines, Brongniart edited a "Journal des Sciences, Arts, et Metiers" during the Revolution.

The next medallion memorialises Scheele, the great Swedish pharmacist and chemist, of whose career details have already been given.

Pierre Bayen (born at Chalons s/Marne, 1725, died 1798) was an army pharmacist for about half of his life, and to him was largely due the organisation of that service. He was with the French Army in Germany all through the Seven Years' War, 1757-1763. Among his scientific works were examinations of many of the natural mineral waters of France, and a careful investigation into the alleged danger of tin vessels used for cooking. Two German chemists, Margraff and Henkel, had reported the presence of arsenic in tin utensils generally, and the knowledge of this fact had produced a panic among housekeepers. Bayen went into the subject thoroughly and was able to publish a reassuring report. To him, too, belongs