Rudolf Albert Kolliker, a German physiologist and microscopist, born in Zurich, July 6, 1817. He studied at the gymnasium and university of his native town till 1839, when he went to Rome and soon after to Berlin. In the last named place he began the important microscopic investigations that first gave him his fame as a physiologist. His attention had first been directed to this branch of study while on a visit to the island of Fohr, off the coast of Schleswig, in 1840, and from that time he devoted himself almost exclusively to it. In 1842 he was appointed assistant to Henle at Zurich, and in 1845 adjunct professor of physiology and comparative anatomy. In 1847 he became professor of the same branches at Wurzburg, and in 1849 of anatomy there. He has published Verzeichniss der Phanerogarnen des Cantons Zurich (Zurich, 1839); Beitrage zur Kenntniss der Geschlechtsverhaltnisse und der Samenflussigkeit wirbelloser Thiere (Berlin, 1841); De prima Insectorum Gencsi (Zurich, 1842); Entwickelung der Cephalopoden (1844); Microscopische Anatomie (2 vols., Leipsic, 1850-'54); Handbuch der Geicebelehre (1852; 5th ed., 1867); Die Entwickelung des Menschen (1861); and Icones Histologicce (1864). He has been a frequent contributor to scientific periodicals, and was one of the founders of the medico-physical society of Wurzburg. He ranks among the greatest histologists; and his works, the chief of which have been translated into English, belong to the highest authorities in anatomical science.