MANSEL, HENRY LONGUEVILLE Eng lish philosopher, was born at Cosgrove, Northamptonshire on Oct. 6, 1820. He was educated at Merchant Taylors' school and St. John's college, Oxford. He took a double first in 1843, and be came tutor of his college. He was appointed reader in moral and metaphysical philosophy at Magdalen college in 1855, and Wayn flete professor in 1859. He was a great opponent of university reform and of the Hegelianism which was then beginning to take root in Oxford. In 1867 he succeeded A. P. Stanley as professor of ecclesiastical history, and in 1868 he was appointed dean of St. Paul's. He died on July 31, 1871.
Mansel maintained the purely formal character of logic, the duality of consciousness as testifying to both self and the external world, and the limitation of knowledge to the finite and "con ditioned." His doctrines were developed in his edition of Aldrich's Artis logicae rudimenta (i849)—his chief contribution to the re viving study of Aristotle—and in his Prolegomena logica: an Inquiry into the Psychological Character of Logical Processes (1851, 2nd ed. enlarged 1862), in which the limits of logic as
the "science of formal thinking" are rigorously determined. In his Bampton lectures on The Limits of Religious Thought (1858, 5th ed. 1867; Danish trans. 1888) he applied to Christian theology the metaphysical agnosticism which seemed to result from Kant's criticism, and which had been developed in Hamilton's Philosophy of the Unconditioned.
Mansel wrote also The Philosophy of the Conditioned (1866) in reply to Mill's criticism of Hamilton; Letters, Lectures, and Reviews (ed. Chandler, 1873), and The Gnostic Heresies (ed. J. B. Lightfoot, 1875, with a biographical sketch by Lord Carnarvon).