Friedrich August Rosen, a German orientalist, born in Hanover, Sept. 2, 1805, died in London, Sept. 12, 1837. After attending the gymnasium in Göttingen, he studied in Leipsic, and subsequently in Berlin, where he was a pupil of Bopp. In 1826 he published his Corporis Radicum Sanscritarum Prolusio, subsequently enlarged under the title of Radices Sanscritoe (1827). In 1829 he became professor of oriental languages in the university of London, which post he exchanged for the professorship of Sanskrit. He was also secretary to the oriental translation committee, and honorary foreign secretary to the royal Asiatic society. He published in 1831 an Arabic treatise on mathematics by Mohammed ben Musa, and wrote the oriental articles for the "Penny Cyclopaedia." At the time of his death he was at work on an edition of the Rig-Veda, and the Asiatic society published in the following year the portion completed by him. He revised the Bengalee, Sanskrit, and English dictionary of Sir Graves Haughton.