There was no salaried professorship in the university until Lady Margaret founded her chair of divinity in 1502. Before this, tuition in each faculty had been assigned to its doctors, the tuition in arts was left in the hands of the masters of arts. The next three professorships to be founded were also in the 3 faculties: the Regius of Divinity by the king in 1540, the Regius of Civil Law in the same year, and the Regius of Physic.[308] Henry also founded Regius professorships of Hebrew and Greek. In 1632 Sir T. Adams founded the Arabic, and in 1663, Henry Lucas, M.P. for the university, the Lucasian of Mathematics; the Knightbridge of Moral Philosophy was founded by a fellow of Peterhouse in 1683. Between that date and 1899 (when the professorship of Agriculture was founded) 35 professorships have been endowed, 16 of which are in natural sciences and medicine, 5 for languages, 4 for history and archæology, 2 more for law, 1 for mental philosophy and logic, and 3 more for divinity, one of which, the Norrisian, is tenable, and is now held by a layman. Fisher and Erasmus were the first holders of the Lady Margaret professorship, and Selwyn, Lightfoot, and Hort held it between the years 1855 and 1892. Bentley and Westcott held the Regius professorship (1717, 1870). Sir T. Smith was the first to hold the Regius of Civil Law, which was also held by Walter Haddon, and by Sir Henry Maine when he was twenty-five years old, Glisson of Caius was one of the distinguished holders of the Regius of Physic (1636), Metcalfe of S. John’s and Cudworth both held the Hebrew professorship, Sir J. Cheke was the first to sit in the chair of Greek following on three such great predecessors and professors of Greek at Cambridge as Erasmus, Croke, and Sir Thomas Smith. Isaac Barrow (1660), Porson (1792) and Sir R. C. Jebb (1889-1906), all Trinity men, have also held it. The Lucasian of Mathematics was held by Barrow, then by Isaac Newton, then by his deputy Whiston of Clare, then by Sanderson of Christ’s, and the chair was filled in the xix century by Airy and Sir George Stokes. Roger Cotes was the first to hold the Plumian of Astronomy (1707) founded three years previously by the Archdeacon of Rochester, who endowed it with an estate at Balsham. Professor Adams, the discoverer of Neptune, held the Lowndean of Astronomy and Geometry (1858-1892). The Regius of Modern History (George I. 1724)[309] was held by the poet Gray, by Sir J. Stephen, Charles Kingsley, Sir J. Seeley, and Lord Acton: the Cavendish professorship of Experimental Physics (founded by Grace of the Senate 1871) was first filled by Clerk Maxwell and Lord Rayleigh; F. W. Maitland (ob. Dec. 1906) held the Downing of Law; and the new Quick professorship of biology has just been offered to an American graduate.[310]