CHRISTIAN, born at Frustenwall in the Mittel-mark, is celebrated for his skill in medicine and botany, in pursuit of which he travelled through many countries, and had correspondents in the most distant parts of the world. He died in the year 1701, in about the seventieth year of his age. He was a member of the academy of the Curieux de la Nature. His works are, 1. Index Nominum Plantarum, printed at Berlin, folio, in 1696, and reprinted, with additions, in 1715, under the title of Lexicon Plantarum Polyglottum Universale; 2. A Chronology of China, in German, printed at Berlin, in 1696, 4to. The following manuscripts of his composition are preserved in the royal library at Berlin, viz., 1. Sur l'Histoire Naturelle du Brasil, in 4 vols. folio; 2. Sur les Fleurs et les Plantes du Japon, with coloured plates, 2 vols. folio.