TYSON, James, physician, born in Philadelphia, Pennsylvania, 26 October, 1841. His father, Henry (1815-'72), was graduated at Pennsylvania medical college in 1843, and practised in Reading until his death. He was active in prison-reform, and established the first Sunday-school in the Hicksite Society of Friends. The son was graduated at Haverford college, Pennsylvania, in 1860, and at the medical department of the University of Pennsylvania in 1863. He was appointed lecturer on microscopy there in 1868, and on urinary chemistry in 1870. In 1870-'8 he was professor of physiology and microscopy in the Pennsylvania college of dental surgery. On the organization of the new university hospital in 1874 he was made lecturer on pathological anatomy and histology. In 1876 he was elected professor of general pathology and morbid anatomy in the medical department of the university. He is now (1889) dean of the medical faculty, president of the board of the Philadelphia hospital, and a member of various medical societies. In 1871-'2 he assisted in editing the "Philadelphia Medical Times," and he also edited four volumes of the publications of the Pathological society of Philadelphia (1871-'7). In addition to numerous papers on histology and pathology, and clinical lectures, he hasPublished " The Cell Doctrine : its History and resent State" (Philadelphia, 1870); "An "Introduction to Practical Histology" (1873); "PracticaI Examination of the Urine" (1.875) ; and " A Treatise on Bright's Disease and Diabetes" (1881).