CLARKE, Edward Hammond, physician, born in Norton, Bristol County, Massachusetts, 2 February, 1820; died in Boston, Massachusetts, 30 November, 1877. He was graduated at Harvard in 1841, took his medical degree at the University of Pennsylvania in 1846, and, after trav-elling extensively in Europe, established himself in Boston, and soon took a high rank among physicians there. He held the professorship of materia medica in Harvard from 1855 till 1872, when he resigned. Dr. Clarke's publications include " Obser-rations on the Treatment of Polypus of the Ear" (Boston, 1869);" Physiological and Therapeutical Action of Bromide of Potassium and Bromide of Ammonium," with R. Amory (1871);" Sex in Education," a book that attracted wide attention (1873); "The Building of a Brain" (Boston, 1874); and "Visions; a Study of False Sight." The last-named work, prepared amid the sufferings of the lingering and painful disease of which he died, was published under the supervision of Dr. Oliver Wendell Holmes, who prefixed a memorial sketch of the author (Boston, 1878). In this work Dr. Clarke occupies a middle ground between those who regard all visions as delusions and those who ascribe to them a preternatural origin. He delivered an address on "Education of Girls" before the National educational association at Detroit, 5 August, 1874.