Part 35

DUROC, GERAUD CHRISTOPHE MICHEL, duc de Frioul (1772-1813), French general, was born at Pont a Mousson (Meurthe et Moselle) on the 25th of October 1772. The son of an officer, he was educated at the military schools of his native town and of Chalons. He was gazetted second lieutenant (artillery) in the 4th regiment in 1793, and advanced steadily in the service. Captain Duroc became aide-de-camp to Napoleon in 1796, and distinguished himself at Isonzo, Brenta and Gradisca in the Italian campaigns of 1796-97. He served in Egypt, and was seriously wounded at Aboukir. His devotion to Napoleon was rewarded by complete confidence. He became first aide-de-camp (1798), general of brigade (1800), and governor of the Tuileries. After the battle of Marengo he was sent on missions to Vienna, St Petersburg, Stockholm and Copenhagen. As grand marshal of the Tuileries he was responsible for the measures taken to secure Napoleon's personal safety whether in France or on his campaigns, and he directed the minutest details of the imperial household. After Austerlitz, where he commanded the grenadiers in the absence of General Oudinot, he was employed in a series of important negotiations with Frederick William of Prussia, with the elector of Saxony (December 1806), in the incorporation of certain states in the Confederation of the Rhine, and in the conclusion of the armistice of Znaim (July 1808). In 1808 he was created duke of Friuli, and after the Russian campaign he became senator (1813). He was in attendance on Napoleon at the battle of Bautzen (20th-21st May 1813) in Saxony, when he was mortally wounded, and died in a farmhouse near the battlefield on the 23rd of May. Napoleon bought the farm and erected a monument to his memory. Duroc was buried in the Invalides.

The chief source for Duroc's biography is the _Moniteur_ (31st of May 1797, 24th of October 1798, 30th of May 1813, &c.).

DUROCHER, JOSEPH MARIE ELISABETH (1817-1858), French geologist, was born at Rennes on the 31st of May 1817. Educated at the Ecole Polytechnique and Ecole des Mines in Paris, he qualified as a mining engineer. Early in his career he travelled in the northern parts of Europe to study the metalliferous deposits, and he contributed the articles on geology, mineralogy, metallurgy and chemistry to Paul Gaimard's _Voyages de la Commission scientifique du nord, en Scandinavie, en Laponie, au Spitzberg et aux Feroe, pendant les annees 1838-1840_. In 1844 he became professor of geology and mineralogy at Rennes. His attention was now largely directed to the study of the artificial production of minerals, to the metamorphism of rocks, and to the genesis of igneous rocks. In 1857 he published his famous _Essai de petrologie comparee_, in which he expressed the view that the igneous rocks have been derived from two magmas which coexist beneath the solid crust, and are respectively acid and basic. He died at Rennes on the 3rd of December 1858.

DURRA (also written _dourah_, _dhura_, &c.; Arabic for a pearl, hence a grain of corn), a cereal grass, _Sorghum vulgare_, extensively cultivated in tropical and semi-tropical countries, where the grain, made into bread, forms an important article of diet. In non-Arabic-speaking countries it is known by other names, such as Indian or African millet, pearl millet, Guinea corn and Kaffir corn. In India it is called jowari, jowaree, jawari, &c. (Hindi, _jawari_).

DURUY, JEAN VICTOR (1811-1894), French historian and statesman, was born in Paris on the 11th of September 1811. The son of a workman at the factory of the Gobelins, he was at first intended for his father's trade, but succeeded in passing brilliantly through the Ecole Normale Superieure, where he studied under Michelet, whom he accompanied as secretary in his travels through France, supplying for him at the Ecole Normale in 1836, when only twenty-four. Ill-health forced him to resign, and poverty drove him to undertake that extensive series of school textbooks which first brought him into public notice. He devoted himself with ardour to secondary school education, holding his chair in the College Henri IV. at Paris for over a quarter of a century. Already known as a historian by his _Histoire des Romains et des peuples soumis a leur domination_ (2 vols., 1843-1844), he was chosen by Napoleon III. to assist him in his life of Julius Caesar, and his abilities being thus brought under the emperor's notice, he was in 1863 appointed minister of education. In this position he displayed incessant activity, and a desire for broad and liberal reform which aroused the bitter hostility of the clerical party. Among his measures may be cited his organization of higher education ("enseignement special"), his foundation of the "conferences publiques," which have now become universal throughout France, and of a course of secondary education for girls by lay teachers, and his introduction of modern history and modern languages into the curriculum both of the _lycees_ and of the colleges. He greatly improved the state of primary education in France, and proposed to make it compulsory and gratuitous, but was not supported in this project by the emperor. In the new cabinet that followed the elections of 1869, Duruy was replaced by Louis Olivier Bourbeau, and was made a senator. After the fall of the Empire he took no part in politics, except for an unsuccessful candidature for the senate in 1876. From 1881 to 1886 he served as a member of the Conseil Superieur de l'Instruction Publique. In 1884 he was elected to the Academy in succession to Mignet. He died in Paris on the 25th of November 1894.

As a historian Duruy aimed in his earlier works at a graphic and picturesque narrative which should make his subject popular. His fame, however, rests mainly on the revised edition of his Roman history, which appeared in a greatly enlarged form in 7 vols. under the title of _Histoire des Romains depuis les temps les plus recules jusqu'a la mort de Theodose_ (1879-1885), a really great work; a magnificent illustrated edition was published from 1879 to 1885 (English translation by W.J. Clarke, in 6 vols., 1883-1886). His _Histoire des Grecs_, similarly illustrated, appeared in 3 vols. from 1886 to 1891 (English translation in 4 vols., 1892). He was the editor, from its commencement in 1846, of the _Histoire universelle, publiee par une societe de professeurs et de savants_, for which he himself wrote a "Histoire sainte d'apres la Bible," "Histoire grecque," "Histoire romaine," "Histoire du moyen age," "Histoire des temps modernes," and "Abrege de l'histoire de France." His other works include _Atlas historique de la France accompagne d'un volume de texte_ (1849); _Histoire de France de 1453 a 1815_ (1856), of which an expanded and illustrated edition appeared as _Histoire de France depuis l'invasion des barbares dans la Gaule romaine jusqu'a nos jours_ (1892); _Histoire populaire de la France_ (1862-1863); _Histoire populaire contemporaine de la France_ (1864-1866); _Causeries de voyage_ (1864); and _Introduction generale a l'histoire de France_ (1865).

A memoir by Ernest Lavisse appeared in 1895 under the title of Un Ministre: _Victor Duruy_. See also the notice by Jules Simon (1895), and _Portraits et souvenirs_ by S. Monod (1897).

DU RYER, PIERRE (1606-1658), French dramatist, was born in Paris in 1606. His earlier comedies are in the loose style of Alexandre Hardy, but after the production of the _Cid_ (1636) he copied the manner of Corneille, and produced his masterpiece _Scevole_, probably in 1644 (the date generally given is 1646). _Alcionee_ (1638) was so popular that the abbe d'Aubignac knew it by heart, and Queen Christina is said to have had it read to her three times in one day. Du Ryer was a prolific dramatist. Among his other works may be mentioned _Saul_ (printed 1642), and a comedy, _Les Vendanges de Suresnes_ (1635 or 1636). He died in Paris on the 6th of November 1658.

DUSE, ELEANORA (1859- ), Italian actress, was born at Vigevano of a family of actors, and made her first stage appearance at a very early age. The hardships incident to touring with travelling companies unfavourably affected her health, but by 1885 she was recognized at home as Italy's greatest actress, and this verdict was confirmed by that of all the leading cities of Europe and America. In 1893 she made her first appearances in New York and in London. For some years she was closely associated with the romanticist Gabriele d'Annunzio, and several of his plays, notably _La Citta morta_ (1898) and _Francesca da Rimini_ (1901), provided her with important parts. But some of her great successes during the 'eighties and early 'nineties--the days of her chief triumphs--were in Italian versions of such plays as _La Dame aux camelias_, in which Sarah Bernhardt was already famous; and Madame Duse's reputation as an actress was founded less on her "creations" than on her magnificent individuality. In contrast to the great French actress she avoided all "make-up"; her art depended on intense naturalness rather than stage effect, sympathetic force and poignant intellectuality rather than the theatrical emotionalism of the French tradition. Her dramatic genius gave a new reading to the parts, and during these years the admirers of the two leading actresses of Europe practically constituted two rival schools of appreciation. Ill-health kept Madame Duse off the stage for some time; but though, after 1900, it was no longer possible for her to avoid "make-up," her rank among the great actresses of history remained indisputable.

See also a biography by L. Rasi (1901); A. Symons, _Studies in Seven Arts_ (1906).

DUSSEK, JOHANN LUDWIG (1761-1812), Bohemian pianist and composer, was born at Czaslau, in Bohemia, on the 9th of February 1761. His father, Johann Joseph Dussek, a musician of high reputation, was organist and choir-master in the collegiate church of Czaslau, and several other members of the family were distinguished as organists. Under the careful instruction of his father he made such rapid progress that he appeared in public as a pianist at the age of six. A year or two later he was placed as a choir boy at the convent of Iglau, and he obtained his first instruction in counterpoint from Spenar, the choir-master. When his voice broke he entered on a course of general study, first at the Jesuits' college, and then at the university of Prague, where he took his bachelor's degree in philosophy. During his curriculum of two and a half years he had paid unremitting attention to the practice and study of his art, and had received further instruction in composition from a Benedictine monk. In 1779 he was for a short time organist in the church of St Rombaut at Mechlin. At the close of his engagement he proceeded to Holland, where he attained great distinction as a pianist, and was employed by the stadtholder as musical instructor to his family. While at the Hague he published his first works, several sonatas and concertos for the piano. He had already composed at the age of thirteen a solemn mass and several small oratorios. In 1783 he visited Hamburg, and placed himself under the instruction of Philip Emmanuel Bach. After spending two years in Lithuania in the service of Prince Radziwill, he went in 1786 to Paris, where he remained, with the exception of a short period spent at Milan, until the outbreak of the Revolution, enjoying the special patronage of Marie Antoinette and great popularity with the public. In Milan he appeared not only as a pianist but also as a player of the harmonica, an instrument which was much sought after on account of its novelty in those days. Towards the close of 1789 he removed to London, where on the 2nd of March 1790 he appeared at Salomon's concerts, and he married a daughter of Dominico Corri, herself a clever harpist and pianist. Unfortunately he was tempted by the large sale of his numerous compositions to open a music-publishing warehouse in partnership with Montague Corri, a relative of his wife. The result was injurious to his fame and disastrous to his fortune. Writing solely for the sake of sale, he composed many pieces that were quite unworthy of his genius; and, as he was entirely destitute of business capacity, bankruptcy was inevitable. In 1800 he was obliged to flee to Hamburg to escape the claims of his creditors. Some years later he was attached in the capacity of musician to the household of Prince Louis Ferdinand of Prussia, with whom he formed an intimate friendship. On the death of his patron in 1806 he passed into the service of the prince of Isenburg as court musician. In 1809 he went to Paris to fill a similar situation in the household of Prince Talleyrand, which he held until his death on the 20th of March 1812.

Dussek had an important influence on the development of pianoforte music. As a performer he was distinguished by the purity of his tone, the combined power and delicacy of his touch, and the facility of his execution. His sonatas, known as _The Invocation_, _The Farewell_ and _The Harmonic Elegy_, though not equally sustained throughout, contain movements that have scarcely been surpassed for solemnity and beauty of idea.

See also Alexander W. Thayer's articles in Dwight's _Journal of Music_ (Boston, 1861).

DUSSELDORF, a town of Germany, in the Prussian Rhine province, on the right bank of the Rhine, 24 m. by rail N. by W. from Cologne. Pop. (1885) 115,190; (1895) 175,985; (1905) 252,630. Dusseldorf is one of the handsomest cities of western Germany. Its situation on the great mid-European waterway and as the junction of several main lines of railway has largely favoured its rapid growth and industrial development. It is the principal banking centre of the Westphalian coal and iron trade, and the favourite residence of the leading merchants of the lower Rhine.

The city consists of five main portions--the Altstadt, the original town with narrow, irregular streets; the Karlstadt, dating from 1787 and so called after the electoral prince Charles Theodore; the Neustadt, laid out between 1690 and 1716; and the Friedrichstadt and the Konigstadt, of recent formation. In addition, the former villages of Pempelfort, Oberbilk, Unterbilk, Flingern and Derendorf have been incorporated and form the outer suburbs of the town proper. On the south side the town has been completely metamorphosed by the removal of the Koln-Mindner and Bergisch-Maerkisch stations to a central station lying to the east. The site thus gained was converted into new boulevards, while the railway to Neuss and Aix-la-Chapelle was diverted through the suburb of Bilk and thence across the Rhine by an iron bridge. A road bridge (completed 1898, 2087 ft. long), replacing the old bridge of boats, carries the electric tram-line to Crefeld. The town, with the exception of the Altstadt, is regularly built, but within its area are numerous open grounds and public squares, which prevent the regularity of its plan degenerating into monotony: the market-place, with the colossal bronze statue of the elector John William, the parade, the Allee Strasse, the Konigs Allee, and the Konigs Platz may be specially mentioned. Of the thirty-seven churches, of which twenty-six are Roman Catholic, the most noticeable are:--St Andrew's, formerly the Jesuit and court church, with frescoes by J. Hubner (1806-1882), E. Deger (1809-1885), and H. Mucke (1806-1891), and the embalmed bodies of several Rhenish electors; St Lambert's, with a tower 180 ft. high and containing a monument to Duke William (d. 1592); Maximilians, with frescoes by J.A.N. Settegast (1813-1890); the Romanesque St Martin's, and the new Gothic church of St Mary. Besides the old ducal palace, laid in ruins by the French in 1794, but restored in 1846, the secular buildings comprise the government offices, the post-office in Italian style, the town hall on the market square, the law courts, the municipal music hall, the municipal theatre, the assembly hall of the Rhenish provincial diet, an Italian Renaissance edifice erected in 1879, the academy of art (1881; in pure Renaissance), the industrial art museum (1896), the historical museum, and the industrial art school. The town also possesses a library of 50,000 volumes, several high-grade schools, and is the seat of a great number of commercial and intellectual associations; but to nothing is it more indebted for its celebrity than to the Academy of Painting. This famous institution, originally founded by the elector Charles Theodore in 1767, was reorganized by King Frederick William III. in 1822, and has since attained a high degree of prosperity as a centre of artistic culture. From 1822 till 1826 it was under the direction of Cornelius, a native of the town, from 1826 to 1859 under Schadow, and from 1859 to 1864 under E. Bendemann (1811-1889). From Bendemann's resignation it continued in the hands of a body of curators till 1873, when Hermann Wislicenus (1825-1899) of Weimar was chosen director. The noble collection of paintings which formerly adorned the Dusseldorf gallery was removed to Munich in 1805, and has not since been restored; but there is no lack of artistic treasures in the town. The academy possesses 14,000 original drawings and sketches by the great masters, 24,000 engravings, and 248 water-colour copies of Italian originals; the municipal gallery contains valuable specimens of the local school; and the same is the case with the Schulte collection. The principal names are Cornelius, Lessing, the brothers Andreas and Oswald Achenbach, A. Baur (b. 1835), A. Tidemand (1814-1876), and L. Knaus (b. 1829). An annual exhibition is held under the auspices of the Art Union; and the members of the Artists' Society, or _Malkasten_, as they are called, have annual festivals and masquerades.

The town is embellished with many handsome monuments--notably a bronze statue of Cornelius, by A. Donndorf (b. 1835), an equestrian statue of the emperor William I. (1896), and a large bronze group in front of the assembly hall of the diet, representing the river Rhine and its chief tributaries. In the suburb of Bilk there are the Floragarten and Volksgarten, the astronomical observatory and the harbour. Extensive quays afford accommodation for vessels of deep draught, and the trade with the Dutch cities and with London has been thereby greatly enhanced. Within recent years Dusseldorf has made remarkable progress as an industrial centre. The first place is occupied by the iron industries, embracing foundries, furnaces, engineering and machine shops, &c. Next come cotton spinning and weaving, calico printing, yarn-spinning, dyeing and similar textile branches, besides a variety of other industries.

A little to the north of the town lies the village of Dusselthal, with Count von der Recke-Volmerstein's establishment for homeless children in the former Trappist monastery, and in the suburb of Pempelfort is the _Jagerhof_, the residence at one time of Prince Frederick of Prussia, and afterwards of the prince of Hohenzollern-Sigmaringen.

Dusseldorf, as the form of the name--the village on the Dussel--clearly indicates, was long a place of small consideration. In 1288 it was raised to the rank of a town by Count Adolf of Berg; from his successors it obtained various privileges, and in 1385 was chosen as their residence. After it had suffered greatly in the Thirty Years' War and the War of the Spanish Succession, it recovered its prosperity under the patronage of the electoral prince John William of the Palatinate, who dwelt in the castle for many years before his death in 1716. In 1795 the town, after a violent bombardment, was surrendered to the French; and after the peace of Luneville it was deprived of its fortifications. In 1805 it became the capital of the Napoleonic duchy of Berg; and in 1815 it passed with the duchy into Prussian possession. Among its celebrities are Johann Georg and Friedrich Heinrich Jacobi, Heinrich Heine, Varnhagen von Ense, Peter von Cornelius, Wilhelm Camphausen and Heinrich von Sybel.

See H. Ferber, _Historische Wanderung durch die alte Stadt Dusseldorf_ (Dusseldorf, 1889-1890); Brandt, _Studien zur Wirtschafts- und Ver-waltungsgeschichte der Stadt Dusseldorf_ (Dusseldorf, 1902); and local _Guide_ by Bone.

DUSSERAH, or DASARA, a Hindu new-moon festival (sometimes called Maha-navami), held in October, and specially connected with ancestral worship. In the native states, such as Mysore, the rajas give public entertainments lasting for ten days, and especially invite European officials to the festivities, which include horse-racing, athletic contests, and banquets.

See J.A. Dubois, _Hindu Manners, Customs and Ceremonies_, p. 577.

DUST, earth or other matter reduced to fine dry and powdery particles; the word is Teutonic and appears in such various forms as the Dutch _duist_, Danish _dyst_, for the dust of flour or meal, and in the older forms _donst_; the modern German _Dunst_, vapour, probably preserves the original form and meaning, that of something which can be blown about by the wind.

_Atmospheric Dust._--The presence of dust in the atmosphere has probably been known from the earliest ages, as prehistoric man must have had plenty of opportunities of noticing it lighting up the paths of sunbeams that penetrated his dark caves, yet it is only of recent years that it has become the subject of scientific observation. Formerly it was considered as simply matter in the wrong place, the presence of which had to be tolerated, but was supposed to serve no useful purpose in nature. It was not till the year 1880 that atmospheric dust came under scientific investigation, when it soon became evident that it played a most important part in nature, and that instead of being a nuisance to be got rid of, it added much to the comforts and pleasures of life.

The atmosphere is composed of a number of gases which have a nearly constant proportion to each other, and of varying proportions of water vapour. This vapour, constantly rising from land and sea, mixes with the gases in the atmosphere and so long as it remains vapour is invisible, but when it becomes cooled by the actual processes in nature the vapour tends to condense to the liquid condition and form cloud particles. Before 1880 it had always been assumed that when this condensation took place, the vapour molecules simply combined with each other to form the little globules of water, but J. Aitken showed that vapour molecules in the atmosphere do not combine with each other, that before condensation can take place there must be some solid or liquid nucleus on which the vapour molecules can combine, and that the dust in the atmosphere forms the nuclei on which the water-vapour molecules condense. Every cloud

## particle being grown round a dust nucleus thus has a dust particle in

it. The presence of dust in the atmosphere allows the condensation of the vapour to take place whenever the air is cooled to the saturation point, and if there were no dust present the condensation would not take place till the air was cooled far below that point, and become highly supersaturated; and when it did take place the condensation would be violent and result in heavy rain-drops without the formation of what we know as cloud. This might be in some ways an advantage, but living in such supersaturated air would have many disadvantages. The supersaturated air having no dust to condense on would condense on our clothes, the inside and outside walls of our dwellings, and on every solid and liquid surface with which it came in contact.

Many of the dust particles in the atmosphere which form the nuclei of condensation are extremely minute, so small as to be beyond the powers of the microscope, and at first sight it might appear to be impossible to get any reliable information as to their numbers. But Aitken, having shown that water vapour must have a nucleus to condense on, saw that this placed in our hands the means of counting the dust particles in our atmosphere, and in 1888 showed how it could be done. As water vapour in the air condenses on the dust particles present and forms cloud

## particles, he showed that all that would be necessary would be to cause