KAYE, or KEYE, Dr John, the founder of Caius College in Cambridge, was born at Norwich in 1510. He was admitted while very young a student in Gonville Hall in the above-mentioned university. From his exercises performed there it seems probable that he intended to prosecute the study of divinity. He travelled into Italy, and at Padua studied under the celebrated Montanus; and in 1541 took his degree in physic at Bologna. In 1543 he visited several parts of Italy, Germany, and France; and returning to England, he began to practise first at Cambridge, then at Shrewsbury, and afterwards at Norwich. He removed to London in 1547, and was admitted fellow of the college of physicians, of which he was several years president. In 1557, being then physician to Queen Mary, he obtained a license to advance Gonville Hall into a college, and he endowed it with several considerable estates, adding an entire new square at the expense of £1,824. Of this college he accepted the mastership, which he held till within a short period of his death. He was physician to Edward VI, Queen Mary, and Queen Elizabeth. Towards the latter end of his life he retired to his own college at Cambridge, where having resigned the mastership to Dr Leggie of Norwich, he spent the remainder of his life as a fellow commoner. He died in July 1573, and was buried in the chapel of his own college. Dr Caius was a learned, active, and benevolent man. In 1557 he erected a monument in St Paul's to the memory of Linacre. In 1563 he obtained a grant for the college of physicians to take the bodies of two malefactors annually for dissection; and he was the inventor of the insignia which distinguish the president from the rest of the fellows.

He wrote, 1. Annals of the College from 1555 to 1572. 2. Translation of several of Galen's works, printed at different times abroad. 3. Hippocrates de Medicamentis; first discovered and published by Dr Caius; also De Ratione Victor, Lov. 1556, 8vo. 4. De Medendi Methodo, Basle, 1554; Lond. 1556, 8vo. 5. Account of the Sweating Sickness in England, Lond. 1556, 1721. It is entitled De Ephemeris Britanniae. 6. History of the University of Cambridge, Lond. 1568, 8vo; 1574, 4to, in Latin. 7. De Thermae Britannicae, but it is doubtful whether this work was ever printed. 8. Of some Rare Plants and Animals, Lond. 1570. 9. De Canibus Britannicis, 1570, 1729. 10. De Pronunciatis Graeco et Latine Lingua, Lond. 1574. 11. De Libris propriis, Lond. 1570. Besides many other works which never were printed.

CAJAZZO, a city of Italy, province of Terra di Lavoro, in the kingdom of Naples, near the Volturno. It has a cathedral, several other churches, and 3,500 inhabitants. Excellent wine is produced in the vicinity.

CAJEPUT, a volatile oil obtained by distillation from a species of Melaleuca, which has obtained the name of melaleuca Cajeputi; cajeput being its Malay name. This tree, or rather shrub, is a native of the island of Amboyna, and of the southern part of Borneo. Cajeput oil is prepared from the leaves which are collected in a hot dry day, macerated in water, and distilled after fermenting for a night. When distilled it is limpid; but being generally transported to Europe in copper flasks it acquires a greenish colour. When imported in glass bottles, it is perfectly pellucid. It is frequently adulterated. It should be free from colour, or of a bluish-green. This oil is extremely pungent to the taste, and has the odour of a mixture of turpentine and camphor. When dropped in water, it diffuses itself over the surface, and then entirely evaporates. It should burn without leaving any residuum. It is very soluble in alcohol, and sparingly so in water. Like other volatile oils, the cajeput is a powerful stimulant, and is used medicinally where such medicines are required. Some practitioners have given it a high character as a remedy for cholera; but it does not appear to have any claim as a specific in the treatment of that disease. The dose taken internally is about five drops. It is used externally as a rubefacient, and is also resorted to occasionally with advantage in toothache.

CAJETAN, Cardinal, was born at Cajeta in the kingdom of Naples in 1469. His proper name was Thomas de Vio, but he adopted that of Cajetan from the place of his nativity. For his zeal in defending the papal pretensions, in a work entitled Of the Power of the Pope, he obtained the bishopric of Cajeta. He was afterwards raised to the archiepiscopal see of Palermo, and in 1517 was made a cardinal by Leo X. The year following he went as legate into Germany, to quiet the commotions raised by Luther against indulgences; but that reformer, under protection of Frederick elector of Saxony, set him at defiance; for though he obeyed the cardinal's summons in repairing to Augsburg, yet he rendered all his proceedings ineffectual. Cajetan was employed in several other negotiations and transactions, being as able in business as in letters. He died in 1534. He wrote commentaries upon Aristotle's philosophy, and upon Thomas Aquinas's theology; and made a free translation of the Old and New Testaments, excepting Solomon's Song and the Prophets, and the Revelation of St John.