Demades
an Athenian orator, who, from a fishmonger, rose to high places in the republic. He was captured by Philip of Macedon in the battle of Chæronea, but soon set at liberty. He afterward exerted his influence in favor of the Macedonian party at Athens, but, betraying Antipater, he was put to death by Cassander, the son of the latter, 318 b. c.
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Demagogue
a ringleader of a faction, or of the rabble; a popular or factious orator; a party leader; a teacher of sedition. In its original acceptation, this word was considered an honorable designation; but it is now almost invariably used in a bad sense.
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Demand and Supply
in political economy, demand has reference to the quantity of goods asked for in the market, and supply has reference to the quantity of goods offered. The laws of demand and supply may be thus stated: when the demand exceeds the supply, competition grows stronger among the buyers, and prices rise, and when the demand falls short of the supply, competition grows stronger among the sellers, and prices fall; or thus, falling prices tend to lessen the supply and increase the demand, while rising prices tend to increase the supply and lessen the demand. A rise in prices tends to encourage production, while a fall in prices tends to discourage it. Conversely, consumption is promoted by falling and lessened by rising prices.
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Demarest
WILLIAM HENRY STEELE, an American educator, born in Hudson, N. Y., in 1863. He graduated from Rutgers College in 1883 and from the New Brunswick Theological Seminary in 1888. He was ordained minister to the Reform Church of America in the same year. After serving as pastor in several churches in New York, he became professor of church history at the New Brunswick Theological Seminary in 1901. In 1906 he was chosen president of Rutgers College.
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Demavend
a volcanic mountain of Persia, and the highest peak of the Elbruz chain, 45 miles S. of the Caspian Sea, and about 40 miles N. E. of Teheran. Its height is about 19,400 feet, and it bears evidence of having been active during the latest geological (if not within the historic) period.
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Dembea
or TSANA, a lake of Abyssinia, in a province of the same name in the W. part of that country. It is of irregular form, about 140 miles in circumference, has an elevation of 6,100 feet above the sea, and forms the reservoir of the Blue Nile. DEMEMBRÉ, or DISMEMBERED, a heraldic term to signify that the members of an animal are cut from its body.
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Dementia
in common parlance, and even in legal language, a word synonymous with insanity. Medically it is applied to those cases of unsound mind which are characterized by a total loss of the faculty of thought, or by such an imbecility of intellect that the ideas are extremely incoherent.
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Demerara
(dem-e-rä'rä), or DEM- ARARA (dem-a-rä'rä), a division of British Guiana, which derives its name from the river Demarara or Demerara. It extends about 100 miles along the coast, lying on the E. of Essequibo, and on the W. of Berbice. The soil is very fertile, producing abundant crops of sugar, coffee, cotton, rice. Chief town, Georgetown. Pop. of province about 125,000. The river, after a course of about 120 miles, flows into the Atlantic.
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Demetrius Phalereus
A disciple of Theophrastus , who gained such influence over the Athenians by his eloquence and the purity of his manners, that he was elected decennial archon, B. C. 317. He embellished the city, and rendered himself popular by his munificence, but his enemies plotted against him, and he fled to the court of Ptolemy Lagus , where he was received with kindness. He put an end to his life by permitting an asp to bite him, B. C. 284. There are several others of the name of Demetrius of minor note.
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Demi-Bastion
in fortification, differs from a bastion in having only one flank instead of two and no curtain.
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Demi-Lune
in fortification, practically the same as a ravelin.
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Demi-Relief
or DEMI-RILIEVO (demäi-ril-i-ā'vō), term applied to a sculpture projecting moderately from the face of a wall; half raised, as if cut in two, and half only fixed to the plane. Mezzo-rilievo is a degree between alto and basso-rilievo.
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Demidoff
a wealthy family of Russia. The founder of the family lived 1665-1720. He was the son of a serf. He established the first foundry in Siberia. Peter the Great employed him to cast his cannon, and gave him the working of mines that brought in wealth. His son continued the working of the copper, silver, and iron mines of the Urals; and grandsons, following the same industries of mining and casting, amassed colossal fortunes. Nicolai Demidoff, who died in 1828, had an income of $1,000,000 a year. The family is a worthy one; various members have been distinguished for philanthropy, progressive political ideas, scholarship, and taste for art.
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Demidov
or DEMIDOFF, a wealthy and influential Russian family, whose head was an armory-founder at Toula. This Demidoff was intrusted by Peter the Great with the business of casting the cannon for that prince's numerous warlike expeditions. În 1725 he discovered the mines of Kolyvan, the working of which speedily enriched him. He left a son, NIKITA, and several grandsons, who distinguished themselves in the same career as their progenitor, and amassed colossal fortunes. The best known of these are PROKOP DEMIDOFF, who worked with great profit the iron, copper, and gold mines of the Ural Mountains; born at Moscow about 1730; NIKOLAY NI- KITICH, a zealous philanthropist, who founded establishments of public utility, and carried to a great state of perfection the working of mines. His last years he passed in France and Italy, enjoying the society of learned men. Born near St. Petersburg, 1773; died in Florence, 1828. He left two sons, PAUL and ANA- TOLE, who, as well as inheriting his fortune, had also the same high taste, and benevolence. Of these, Count Anatole allied himself to the Bonaparte family, by marrying, in 1840, one of Napoleon's nieces, the Princess Mathilde, daughter of Jerome, and sister of Prince Napoleon. Russia, as well as other countries, owe to him the foundation of many valuable charitable institutions. He died in 1858.
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