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 (1510–1563), from whom it was, however, soon repurchased. Hahnemann, the founder of homoeopathy, lived and worked in Cöthen. From 1603 to 1847 Cöthen was the capital of the principality, later duchy, of Anhalt-Cöthen.

COTMAN, JOHN SELL (1782–1842), English landscape-painter and etcher, son of a well-to-do silk mercer, was born at Norwich on the 16th of May 1782. He showed a talent for art and was sent to London to study, where he became the friend of Turner, T. Girtin and other artists. He first exhibited at the Royal Academy in 1800. In 1807 he went back to Norwich and joined the Norwich Society of Artists, of which in 1811 he became president. In 1825 he was made an associate of the Society of Painters in Water-colours; in 1834 he was appointed drawing-master at King’s College, London; and in 1836 he was elected a member of the Institute of British Architects. He died in London on the 24th of July 1842. Cotman’s work was not considered of much importance in his own day, and his pictures only procured small prices; but he now ranks as one of the great figures of the Norwich school. He was a fine draughtsman, and a remarkable painter both in oil and water-colour. One of his paintings is in the National Gallery. His fine architectural etchings, published in a series of volumes, the result of tours in Norfolk and Normandy, are valuable records of his interest in archaeology. He married early in life, and had five children, his sons, Miles Edmund (1810–1858) and Joseph John (1814–1878), both becoming landscape-painters of merit; and his younger brother Henry’s son, Frederic George Cotman (b. 1850), the water-colour artist, continued the family reputation.

 COTONEASTER, a genus of the rose family (Rosaceae), containing about twenty species of shrubs and small trees, natives of Europe, North Africa and temperate Asia. C. vulgaris is native on the limestone cliffs of the Great Orme in North Wales. Several species are grown in shrubberies and borders, or as wall plants, mainly for their clusters of bright red or yellow berry-like fruits. Plants are easily raised by seeds, cuttings or layers, and grow well in ordinary soil.

 COTOPAXI, a mountain of the Andes, in Ecuador, South America, 35 m. S.S.E. of Quito, remarkable as the loftiest active volcano in the world. The earliest outbursts on record took place in 1532 and 1533; and since then the eruptions have been both numerous and destructive. Among the most important are those of 1744, 1746, 1766, 1768 and 1803. In 1744 the thunderings of the volcano were heard at Honda on the Rio Magdalena, about 500 m. distant; in 1768 the quantity of ashes ejected was so great that it covered all the lesser vegetation as far as Riobamba; and in 1803 Humboldt reports that at the port of Guayaquil, 160 m. from the crater, he heard the noise day and night like continued discharges of a battery. There were considerable outbursts in 1851, 1855, 1856, 1864 and 1877. In 1802 Humboldt made a vain attempt to scale the cone, and pronounced the enterprise impossible; and the failure of Jean Baptiste Boussingault in 1831, and the double failure of M. Wagner in 1858, seemed to confirm his opinion. In 1872, however, Dr Wilhelm Reiss succeeded on the 27th and 28th of November in reaching the top; in the May of the following year the same feat was accomplished by Dr A. Stübel, and he was followed by T. Wolf in 1877, M. von Thielmann in 1878 and Edward Whymper in 1880.

Cotopaxi is frequently described as one of the most beautiful mountain masses of the world, rivalling the celebrated Fujiyama of Japan in its symmetry of outline, but overtopping it by more than 7000 ft. It is more than 15,000 ft. higher than Vesuvius, over 7000 ft. higher than Teneriffe, and nearly 2000 ft. higher than Popocatepetl. Its slope, according to Orton, is 30°, according to Wagner 29°, the north-western side being slightly steeper than the south-eastern. The apical angle is 122° 30′. The snowfall is heavier on the eastern side of the cone which is permanently covered, while the western side is usually left bare, a phenomenon occasioned by the action of the moist trade winds from the Atlantic. Its height according to Whymper is 19,613 ft., and its crater is 2300 ft. in diameter from N. to S., 1650 ft. from E. to W., and has an approximate depth of 1200 ft. It is bordered by a rim of trachytic rock, forming a black coronet above the greyish volcanic dust and sand which covers its sides to a great depth. Whymper found snow and ice under this sand. On the southern slope, at a height of 15,059 ft., is a bare cone of porphyritic andesite called El Picacho, “the beak,” or Cabeza del Inca, “the Inca’s head,” with dark cliffs rising fully 1000 ft., which according to tradition is the original summit of the volcano blown off at the first-known eruption of 1532. The summit of Cotopaxi is usually enveloped in clouds; and even in the clearest month of the year it is rarely visible for more than eight or ten days. Its eruptions produce enormous quantities of pumice, and deep layers of mud, volcanic sand and pumice surround it on the plateau. Of the air currents about and above Cotopaxi, Wagner says (Naturw. Reisen im trop. Amerika, p. 514): “On the Tacunga Plateau, at a height of 8000 Paris feet, the prevailing direction of the wind is meridional, usually from the south in the morning, and frequently from the north in the evening; but over the summit of Cotopaxi, at a height of 18,000 ft., the north-west wind always prevails throughout the day. The gradually-widening volcanic cloud continually takes a south-eastern direction over the rim of the crater; at a height, however, of about 21,000 ft. it suddenly turns to the north-west, and maintains that direction till it reaches a height of at least 28,000 ft. There are thus from the foot of the volcano to the highest level attained by its smoke-cloud three quite distinct regular currents of wind.”

 COTRONE (anc. Croto, Crotona), a seaport and episcopal see on the E. coast of Calabria, Italy, in the province of Catanzaro, 37 m. E.N.E. of Catanzaro Marina by rail, 143 ft. above sea-level. Pop. (1901) town, 7917; commune, 9545. It has a castle erected by the emperor Charles V. and a small harbour, which even in ancient times was not good, but important as the only one between Taranto and Reggio. It exports a considerable quantity of oranges, olives and liquorice.

 COTTA, the name of a family of German publishers, intimately connected with the history of German literature. The Cottas were of noble Italian descent, and at the time of the Reformation the family was settled in Eisenach in Thuringia.

(1) (1631–1692), the founder of the publishing house of J. G. Cotta, married in 1659 the widow of the university bookseller, Philipp Braun, in Tübingen, and took over the management of his business, thus establishing the firm which was subsequently associated with Cotta’s name. On his death, in 1692, the undertaking passed to his only son, Johann Georg (2); and on his death in 1712, to the latter’s eldest son, also named Johann Georg (3), while the second son, Johann Friedrich (see below), became the distinguished theologian.

Although the eldest son of Johann Georg (3), Christoph Friedrich Cotta (1730–1807), established a printing-house to the court at Stuttgart, the business languished, and it was reserved to his youngest son, (1764–1832), who was born at Stuttgart on the 27th of April 1764, to restore the fortunes of the firm. He attended the gymnasium of his native place, and was originally intended to study theology. He, however, entered the university of Tübingen as a student of mathematics and law, and after graduating spent a considerable time in Paris, studying French and natural science, and mixing with distinguished literary men. After practising as an advocate in one of the higher courts, Cotta, in compliance with his father’s earnest desire, took over the publishing business at Tübingen. He began in December 1787, and laboured incessantly to acquire familiarity with all the details. The house connexions rapidly extended; and, in 1794, the Allgemeine Zeitung, of which Schiller was to be editor, was planned. Schiller was compelled to withdraw on account of his health; but his friendship with Cotta deepened every year, and was a great advantage to the poet and his family. Cotta awakened in Schiller so warm an attachment that, as Heinrich Döring tells us in his life of Schiller (1824), when a bookseller offered him a higher price than Cotta for the copyright of Wallenstein, the poet firmly declined it, replying “Cotta deals honestly with me, and I with him.” In 1795 Schiller and Cotta founded