Friedrich Hoffmann, a German physician, born in Halle, Feb. 19, 1660, died there, Nov. 12, 1742. He graduated at Jena, visited Holland and England, and after his return was appointed physician to Frederick William, elector of Brandenburg. The elector Frederick III., afterward king of Prussia, appointed him in 1693 chief professor of medicine in the university recently founded at Halle. In 1708 he was appointed physician to the king, and removed to Berlin; but in 1712 he returned to his professorship at Halle. He was one of the first to advance medicine from the old mediaeval grounds, maintaining that the phenomena of living bodies are not to be explained by the laws of inanimate or inorganic nature, but that they depend on the continued action of life. He tested the action of many medicines, and invented new ones, of which the elixirium viscerale and liquor anodynus are still in use. He was the discoverer and introducer of Seidlitz waters, and of the salt obtained from them. Among his works which are still of value are Systema Medicinoe Ra-tionalis (9 vols., Halle, 1718-'40), Medicina Consultatoria (12 vols., 1721-'39), and Consul-tationum et Responsorum Medicittalium Centurioe (1734). His life, in Latin, was written by J. II. Schultze, and published at Halle in 1730.