Hardwicke (Edward Arthur), M.D., eldest son of Junius Hardwicke, F.R.C.S., of Rotherham, Yorks. In '75 he qualified as a surveyor, and in '86 as a physician. For twelve years he was Surgeon Superintendent of the Government Emigration Service. He is an Agnostic of the school of Herbert Spencer, and has contributed to Freethought and scientific periodicals. Hardwicke (Herbert Junius), M.D., brother of above, b. Sheffield, 26 Jan. 1850. Studied at London, Edinburgh and Paris. In '78 he became a member of the Edinburgh College of Physicians. Next year he was the principal agent in establishing the Sheffield Public Hospital for Skin Diseases. Besides numerous medical works, Dr. Hardwicke set up a press of his own in order to print The Popular Faith Unveiled, the publishers requiring guarantee in consequence of the prosecution of Mr. Foote ('84), and Evolution and Creation ('87). He has contributed to the Agnostic Annual, and has recently written Rambles in Spain, Italy and Morocco ('89). Harriot (Thomas), English mathematician, b. Oxford, 1560, accompanied Raleigh to Virginia and published an account of the expedition. He was noted for his skill in algebra, and A. Wood says "He was a Deist." Died 21 July 1621. Harrison (Frederic), M.A., English Positivist, b. London 18 Oct. 1831, educated at London and Oxford, when he was 1st class in classics. He was called to the bar in '58. He has since been appointed Professor of Jurisprudence and International Law. He has written many important articles in the high-class reviews, and has published The Meaning of History, Order and Progress, and on The Choice of Books and Other Literary Pieces, '86, and has translated vol. ii of Comte's Positive Polity. He was one of the founders of the Positivist school, '70, and of Newton Hall in '81. A fine stylist, his addresses and magazine articles bear the stamp of a cultured man of letters. Hartmann (Karl Robert Eduard), German pantheistic pessimist philosopher, b. Berlin, 23 Feb. 1842. In '58 he entered the Prussian army, but an affection of the knee made him resign in '65. By the publication of his Philosophy of the Unconscious in '69, he became famous, though it was not translated into English until '84. He has since written numerous works of which we name Self-Dissolution of Christianity and The Religion of the Future, '75, The Crisis of Christianity in Modern Theology, '80, The Religious Consciousness of Mankind, '81, and Modern Problems, '86. Latterly Hartmann has turned his attention to the philosophy of politics.