COHNHEIM, JULIUS (1839-1884), German physiologist, was born at Demmin on July 2o, 1839, and died on Aug. 15, 1884 at Leipzig. After serving as an army surgeon in 1864-65 he became an assistant in the Pathological institute in Berlin and was the most distinguished of Virchow's pupils. He was subse quently professor of pathology at Kiel (1868), Breslau (18 7 2 ) and Leipzig (1876), where he was also director of the Patholog ical institute. He was a brilliant teacher, and Ehrlich was among his pupils at Breslau. His first important dissertation on inflamma tion of serous membranes appeared in 1861, and was followed by other important papers on that subject from 1869 to 1873. On this question his teaching was opposed to that of Virchow. He showed that inflammation is due to the passage of white corpuscles through the walls of the capillaries and that pus is formed largely of these corpuscles in a disintegrated state. Cohnheim made many useful innovations in the method of microscopical work. His most important book is his Vorlesungen caber allgemeine Pathologic (2nd ed. 1882).