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Cadwallader Colden. Courtesy of the National Library of Medicine (B04876).

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Colden, Cadwallader (07 February 1689–20 September 1776), physician, natural scientist, and lieutenant governor of New York, was born of Scottish parents in Ireland, where his mother (name unknown) was visiting. His father was the Reverend Alexander Colden of Duns, Scotland. Colden graduated in 1705 from the University of Edinburgh. He then studied medicine in London but, lacking the money to establish a medical practice in Great Britain, migrated to Philadelphia in 1710. Welcomed by his mother’s sister Elizabeth Hill, Colden established himself as a merchant and physician. He returned to Scotland briefly in 1715, where in November of that year he married Alice Chrystie of Kelso, Scotland. After their marriage they returned to Philadelphia; the couple had eleven children. During a 1717 visit to New York, Colden was persuaded by Governor ...

Article

Leeds, John (18 May 1705– March 1790), public official, surveyor, and mathematician, was born at Bay Hundred, Talbot County, Maryland, the son of Edward Leeds and Ruth Ball. Leeds, apparently self-educated, developed an expertise in mathematics and an interest in astronomy. He married Rachel Harrison in a Quaker ceremony in 1726; the couple had three daughters. He resided in Talbot County for his entire life and held a variety of public offices, beginning in 1734 as a justice of the peace....