JOHN RHODOLPHUS, a celebrated German chemist, who flourished about the year 1646. He wrote a great number of different treatises on chemistry, some of which have been translated into Latin and French. All his works have been collected into one volume, entitled Glauberus concentretus, which was translated into English, and printed at London, in folio, in 1689.

GLAUBER'S Salts, or Sulphate of Soda. See CHEMISTRY Index.