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Stone, Witmer (22 September 1866–23 May 1939), naturalist and science historian, was born in Philadelphia, Pennsylvania, the son of Frederick Dawson Stone, a businessman and librarian of the Historical Society of Pennsylvania, and Anne Evelina Witmer. His family was of Quaker and Pennsylvania-German origin. Stone’s attraction to natural history began during early childhood; and at the age of sixteen, he organized the “Wilson Natural Science Association” in collaboration with his brother Frederick D. Stone, Jr., and their young friends, Stewardson and Amos P. Brown. The goals of this amateur club were to study and collect samples of the geology, flora, and fauna of the region around Germantown. In later years, Stone recalled that the association provided the boys with an “admirable basis” for their future careers as scientists, reflected in the broad range of their professional scholarly activities. After six years at Germantown Academy, Stone enrolled at the University of Pennsylvania, where he received an A.B. in 1887 and an A.M. in 1891....

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Williams, Stephen West (27 March 1790–07 July 1855), physician, naturalist, and medical historian, was born in Deerfield, Massachusetts, the son of William Stoddard, a physician, and Mary Hoyt. Williams attended the local academy and at age eighteen began to study medicine with his father. While still a student, he sent Dr. ...