PROF. JULIUS COHNHEIM, the eminent experimental pathologist, was born on July 20, 1839, at Demmin in Pomerania. He studied medicine at the universities of Würzburg, Marburg, Greifswald and Berlin, where he qualified in 1861 with a thesis on suppuration in serous membranes. After acting as an assistant to Virehow in Berlin and serving as an army surgeon in the war with Austria, he was appointed professor of morbid anatomy at Kiel, where he remained until 1872. He was then transferred in a, similar capacity to Breslau and finally occupied the corresponding chair at Leipzig in 1878, where he stayed until his death six years later. Cohnheim was a highly skilled technician, and made several valuable contributions to microscopical science, among which may be mentioned his methods for demonstrating the nerve endings in the cornea, the structure of striated muscle and the phenomena of inflammation. His successful inoculation in 1868 of tuberculosis in the anterior chamber of a rabbit's eye, thus proving the disease to be infectious, is an important landmark in the history of tuberculosis. His principal literary work is represented by his lectures on general pathology published in 1877–80 and translated in 1888–90 in the New Sydenham Society's publications, in which he dealt with the pathology of the circulation, nutrition, digestion, respiration, genito-urinary organs and animal heat. He also published several valuable articles on malignant growths, trichinosis and the bone marrow in anæmia. His stimulating lectures attracted a large number of students from all parts of Germany, and he had many men who later became eminent among his audience, including Heidenhain, Litten, Welch and Neisser at Breslau and Roy and Councilman at Leipzig. He died at the early age of forty-five years on August 15, 1884, from the effects of gout.