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 Denmark, and both his sons, John George and Frederick Augustus, became electors of Saxony, the latter also becoming king of Poland as Augustus II.

. (1668–1694), elector of Saxony, was born on the 18th of October 1668. At the beginning of his reign his chief adviser was Hans Adam von Schöning (1641–1696), who counselled a union between Saxony and Brandenburg and a more independent attitude towards the emperor. In accordance with this advice certain proposals were put before Leopold I. to which he refused to agree; and consequently the Saxon troops withdrew from the imperial army, a proceeding which led the chagrined emperor to seize and imprison Schöning in July 1692. Although John George was unable to procure his minister’s release, Leopold managed to allay the elector’s anger, and early in 1693 the Saxon soldiers rejoined the imperialists. This elector is chiefly celebrated for his passion for Magdalene Sibylle von Neidschütz (d. 1694), created in 1693 countess of Rochlitz, whom on his accession he publicly established as his mistress. John George left no legitimate issue when he died on the 27th of April 1694.

JOHN MAURICE OF NASSAU (1604–1679), surnamed the Brazilian, was the son of John the Younger, count of Nassau-Siegen-Dillenburg, and the grandson of John, the elder brother of William the Silent and the chief author of the Union of Utrecht. He distinguished himself in the campaigns of his cousin, the stadtholder Frederick Henry of Orange, and was by him recommended to the directors of the Dutch West India company in 1636 to be governor-general of the new dominion in Brazil recently conquered by the company. He landed at the Recife, the port of Pernambuco, and the chief stronghold of the Dutch, in January 1637. By a series of successful expeditions he gradually extended the Dutch possessions from Sergipe on the south to S. Luis de Maranham in the north. He likewise conquered the Portuguese possessions of St George del Mina and St Thomas on the west coast of Africa. With the assistance of the famous architect, Pieter Post of Haarlem, he transformed the Recife by building a new town adorned with splendid public edifices and gardens, which was called after his name Mauritstad. By his statesmanlike policy he brought the colony into a most flourishing condition and succeeded even in reconciling the Portuguese settlers to submit quietly to Dutch rule. His large schemes and lavish expenditure alarmed however the parsimonious directors of the West India company, but John Maurice refused to retain his post unless he was given a free hand, and he returned to Europe in July 1644. He was shortly afterwards appointed by Frederick Henry to the command of the cavalry in the States army, and he took part in the campaigns of 1645 and 1646. When the war was ended by the peace of Münster in January 1648, he accepted from the elector of Brandenburg the post of governor of Cleves, Mark and Ravensberg, and later also of Minden. His success in the Rhineland was as great as it had been in Brazil, and he proved himself a most able and wise ruler. At the end of 1652 he was appointed head of the order of St John and made a prince of the Empire. In 1664 he came back to Holland; when the war broke out with England supported by an invasion from the bishop of Münster, he was appointed commander-in-chief of the Dutch forces on land. Though hampered in his command by the restrictions of the states-general, he repelled the invasion, and the bishop, Christoph von Galen, was forced to conclude peace. His campaigning was not yet at an end, for in 1673 he was appointed by the stadtholder William III. to command the forces in Friesland and Groningen, and to defend the eastern frontier of the Provinces. In 1675 his health compelled him to give up active military service, and he spent his last years in his beloved Cleves, where he died on the 20th of December 1679. The house which he built at the Hague, named after him the Maurits-huis, now contains the splendid collections of pictures so well known to all admirers of Dutch art.

.—Caspar Barlaeus, Rerum per octennium in Brasilia et alibi nuper gestarum historia, sub praefectura illustrissimi comitis J. Mauritii Nassoviae (Amsterdam, 1647); L. Driessen, Leben des Fürsten Johann Moritz von Nassau (Berlin, 1849); D. Veegens, Leven van Joan Maurits, Graaf van Nassau-Siegen (Haarlem, 1840).

JOHN O’ GROAT’S HOUSE, a spot on the north coast of Caithness, Scotland, 14 m. N. of Wick and 1 m. W. of Duncansby Head. It is the mythical site of an octagonal house said to have been erected early in the 16th century by one John Groot, a Dutchman who had migrated to the north of Scotland by permission of James IV. According to the legend, other members of the Groot family followed John, and acquired lands around Duncansby. When there were eight Groot families, disputes began to arise as to precedence at annual feasts. These squabbles John Groot is said to have settled by building an octagonal house which had eight entrances and eight tables, so that the head of each family could enter by his own door and sit at the head of his own table. Being but a few miles south of Dunnet Head, John o’ Groat’s is a colloquial term for the most northerly point of Scotland. The site of the traditional building is marked by an outline traced in turf. Descendants of the Groot family, now Groat, still live in the neighbourhood. The cowry-shell, Cypraea europaea, is locally known as “John o’ Groat’s bucky.”

JOHNS HOPKINS UNIVERSITY, an American educational institution at Baltimore, Maryland, U.S.A. Its trustees, chosen by Johns Hopkins (1794–1873), a successful Baltimore merchant, were incorporated on the 24th of August 1867 under a general act “for the promotion of education in the state of Maryland.” But nothing was actually done until after the death of Johns Hopkins (Dec. 24, 1873), when his fortune of $7,000,000 was equally divided between the projected university and a hospital, also to bear his name, and intended to be an auxiliary to the medical school of the university. The trustees of the university consulted with many prominent educationists, notably Charles W. Eliot of Harvard, Andrew D. White of Cornell, and James B. Angell of the university of Michigan; on the 30th of December 1874 they elected (q.v.) president. The university was formally opened on the 3rd of October 1876, when an address was delivered by T. H. Huxley. The first year was largely given up to consultation among the newly chosen professors, among whom were—in Greek, B. L. Gildersleeve; in mathematics, J. J. Sylvester; in chemistry, Ira Remsen; in biology, Henry Newell Martin (1848–1896); in zoology, William Keith Brooks (1848–1908); and in physics, Henry Augustus Rowland (1848–1901). Prominent among later teachers were Arthur Cayley in mathematics, the Semitic scholar Paul Haupt (b. 1858), Granville Stanley Hall in psychology, Maurice Bloomfield in Sanskrit and comparative philology, James Rendel Harris in Biblical philology, James Wilson Bright in English philology, Herbert B. Adams in history, and Richard T. Ely (b. 1854) in economics. The university at once became a pioneer in the United States in teaching by means of seminary courses and laboratories, and it has been eminently successful in encouraging research, in scientific production, and in preparing its students to become instructors in other colleges and universities. It includes a college in which each of five parallel courses leads to the degree of Bachelor of Arts, but its reputation has been established chiefly by its other two departments, the graduate school and the medical school. The graduate school offers courses in philosophy and psychology, physics, chemistry and biology, historical and economic science, language and literature, and confers the degree of Doctor of Philosophy after at least three years’ residence. From its foundation the university had novel features and a liberal administration. Twenty annual fellowships of $500 each were opened to the graduates of any college. Petrography and laboratory psychology were among the new sciences fostered by the new university. Such eminent outsiders were secured for brief residence and lecture courses as J. R. Lowell, F. J. Child, Simon Newcomb, H. E. von Holst, F. A. Walker, William James, Sidney Lanier, James Bryce, E. A. Freeman, W. W. Goodwin, and Alfred Russel Wallace. President Gilman gave up his presidential duties on the 1st of