Karl Remigins Fresenius, a German chemist, born in Frankfort, Dec. 28, 1818. He completed his studies at Bonn and at Giessen under Liebig, whose assistant he became. In 1845 he was appointed professor of chemistry, physical science, and technology at the agricultural institute in Wiesbaden, where he founded a chemical laboratory, which has acquired great celebrity, and to which a pharmaceutic school was added in 1862. In the same year he founded at Brunswick Die Zeit-schrift fur analytisehe Chernie. He is a high authority on analytical chemistry, and has published a valuable series of works relating to the mineral springs of Wiesbaden, and of other German watering places. His principal works are Anleitung zur qualitativen, chemischen Analyse (Bonn, 1841; 13th ed., 1870), and Anleitung zur quantitativen chemischen Analyse (Brunswick, 1846; 2d ed., 1866; English translation, System of Instruction in Quantitative Chemical Analysis," edited by S. W. Johnson, New York, 1869).