John Wilkins, an English prelate, born in 1614, died in London, Nov. 19,1672. He signed the " Solemn League and Covenant," formed with Wallis and others in London a club which was the nucleus of the royal society, in 1648 became warden of Wadham college, Oxford, in 1656 married the widowed sister of Oliver Cromwell, and in 1659 was made master of Trinity college, Cambridge. He was ejected at the restoration, but Charles II. made him rector of St. Lawrence, Jewry, London, in 1662, and bishop of Chester in 1668. His principal works are: " The Discovery of a New World," containing arguments to prove the moon habitable (4to, London, 1638); "Discourse concerning a New Planet" (1640); "Mercury, or the Secret Messenger," an essay on modes of telegraphing (1641); "Mathematical Magic, or the Wonders that may be performed by Mechanical Geometry" (1648); "Essay toward a Real Character and a Philosophical Language " (1668); and "Principles and Duties of Natural Religion" (1675). He invented and described the perambulator or measuring wheel.