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hospital of Cliicago in 1850, and was one of the attending physicians and clinical instructors until 1892. He was also professor of medical jurisprudence in the Union college of law, after- ward Northwestern university law school, 1875-96. He was one of the chief founders of the American med- ical association in 1846-47, of the Illinois state medical society, and of the Chicago medical society, both in 18.50. He took an active part in the in- ternational medical congress in connec- tion with the Cen- tennial celebration at Philadelphia, 1876, giving the address on the progress of med- ical education during the first century of our national history. He also took a lead- ing part in organizing the ninth international medical congress held in Washington, D.C., 1887, first as secretary -general and subsequently as president. He was one of the organizers and active supporters of the Chicago acad- emy of sciences, the Northwestern university, the Chicago historical society, the Relief and aid society, and the American medical temper- ance association. He edited the Chicago Medical Journal, 1855-59; the Chicago Medical Examiner, 1860-73, and the Journal of the 'American Medical Association, 1883-89. He was married to Anna M., daughter of John and Alvira (Wadhams) Parker. He received the honorary degree of A.M. from the Northwestern university in 1871, and that of LL.D. from the Illinois Wes- leyan university in 1878, and from the North- western university in 1897. Besides numerous contributions to medical periodicals, the trans- actions of medical societies and other medical works, he is the author of: A Text-book on Agri- cultural Chemistry Designed for use in the Public and High Schools (1848); A History of Medical Education and Institutions in the United States (1850) ; A History of the American Medical Associ- ation (1855) ; Clinical Lectures on Vaiious Important Diseases (1878) ; and Lectures on the Principles and Practice of Medicine (1884, 2 ed., 1886).

DAVIS, Nathan Smith, physician, was born in Chicago, 111., Sept. 5, 1858; son of Dr. Nathan Smith and Anna M. (Parker) Davis, and grand- son of Dow and Eleanor (Smith) Davis, and of John and Alvira (Wadhams) Parker. He pre- pared for college at private schools in Chicago,

and at the academy of Northwestern university ; was graduated at Northwestern university in 1880, and at Chicago medical college in 1883 ; and studied medicine at hospitals and laboratories in Heidelberg and Vienna in 1885. He was associate professor of pathology in Nortliwestern uni- versity medical college, 1884-86 ; became profes- sor of principles and practice of medicine and of clinical medicine there in 1886, and secretary of the faculty in 1895. He was appointed physician to Mercy hospital in 1884; was a member of the American medical association ; of the 9th Inter- national medical congress ; of the Pan-American medical congress; chairman of the section of practice, Illinois state medical society, 1893; trustee of Northwestern university ; member of the board of management of the Y.M.C.A of Chicago ; of the American climatological society ; the American academy of medicine ; the Illinois state medical society; the Chicago medical society; the Chicago medico-legal society; the Chicago academy of sciences ; the Illinois state microscopical society, and the Chicago literary club. He was married in 1884, to Jessie B., daughter of Judge -James C. Hopkins of Madison, Wis. He is the author of : Consumption: Hmo to Prevent^ It, and How to Live with It; Diseases of Lungs, Heart and Kidneys ; and of numerous con- tributions to periodical medical literature.

DAVIS, Nathaniel French, educator, was born in Lakeport, N.H., June 11, 1847; son of John and Rhoda French (Maxfield) Davis; grand- son of Nathaniel Davis of Gilford, N.H., and of Ezra Maxfield of Chichester, N.H., and great- grandson of Nathaniel Davis of Madbury, N.H. He was graduated at Brown university in 1870, and for two years taught in the, Riverview mili- tary academy at Poughkeepsie, N.Y. He was vice-principal and professor of mathematics at the Keystone state normal school, Kutztown, Pa., 1873-74. Returning to Brown university he was instructor in mathematics, 1874-79 ; assistant professor, 1879-89; associate professor, 1889-90, and in 1890 he was appointed professor of pure mathematics. He was elected to membership in the American mathematical society, and was president of the Barnard club of Rhode Island, 1895-96. Colby university gave him the degree of LL.D. in 1894.

DAVIS, Nelson Henry, soldier, was born in Oxford, Mass., Sept. 20, 1821. He was graduated at the U.S. military academy in 1846, and as- signed to the 3d infantry. He saw service in the Mexican war and was brevetted 1st lieutenant for gallantry at Contreras and Churubusco. He was also engaged in the siege of Vera Cruz, the battle of Cerro Gordo, and the capture of the capital city. He was afterward on frontier service and was promoted 1st lieutenant Jan. 8,