DUO 2 



gong, called also sea-cow, siren, &c., in- 

 habits the Indian ocean, and is often con- 

 founded by travellers with the Manatus. 

 See HALICOSE and MAN-ATI'S. 



DUK.E, from dux. In Great Britain 

 Duke is the highest title of nobility infe- 

 rior to prince, but in some countries of the 

 continent a duke is a sovereign prince 

 without the title of king. In Britain 

 duke is a mere title, without giving any 

 domain or jurisdiction over the place i 

 whence the title is derived. The consort 

 of a duke has the title of duchess. 



DUL'CIMER, Ital. dolcimello, from dolce, 

 sweet ; a musical instrument strung with ; 

 50 wires stretched over a bridge at each 

 end, and played upon by striking the wires 

 with little iron rods. 



DUMO'S^E, the 43d matural order of 

 plants in the natural system of Linnaeus. 

 Name from dumus, a bush, because the 

 plants are chiefly shrubs or low bushy 

 trees. Ex. the elder. 



DC'MOSB, Lat. dumosus, bushy, applied 

 to plants chiefly. 



DUNE. In geology, a low hill or bank of 

 drifted sand ; the word is British, dim, an 

 eminence. 



DU'NELM. In church matters, the signa- 

 ture of the Bishop of Durham, the Chris- 

 tian name being usually prefixed ; it is a 

 contraction of Dunelmensis. 



DuNa'iNO. In calico printing, the ap- 

 plication of a bath of cow-dung diffused 

 through hot water to cotton goods in a 

 particular.stage of the process. 



DUN'KERS, a Christian sect which arose 

 in Pennsylvania, in 1724. 



DUN'S AGE. In commercial navigation, 

 loose wood, as pieces of timber, boughs of 

 trees, fagots, &c., laid in the bottom and 

 against the sides of a ship's hold, either 

 to raise the cargo when she is loaded 

 "with heavy goods, or to prevent the cargo 

 from being damaged in the event of her 

 becoming leaky. 



DUN'NISG, a method of curing cod-fish 

 BO as to give them a particular colour 

 (dun) and quality, practised at the isle of 

 Shoals in New Hampshire, North Ame- 

 rica. The cod are split, slack-salted and 

 piled for two or three months in a dark 

 stove, covered for the greater part of the 

 time with salt, hay, or eel-grass, and 

 pressed with some weight. They are 

 turned over, piled again in the same dark 

 stove, in which they are allowed to re- 

 main for two or three months more, when 

 they are fit for use. 



DCODEC'IMALS, from duodecim , t wel ve ; 

 numbers proceeding in a proportion of 

 twelves, in the same manner as decimals 

 proceed in a proportion of tens. This no- 

 tation is commonly employed by artifi- 

 cers in casting up the contents of their 

 work, dimensions being commonly stated 

 in feet, inches, and twelfths i and from 



DUT 



the manner of performing the 



the process is called cross multiplication. 



DUODECIMO, Lat. from duodecim, t \veiv? ; 

 having twelve leaves to a sheet ; the 

 name given to a book in which the sheet* 

 are each folded into twelve leaves, written. 

 12mo. 



DronEN'ARY ARITHMETIC, that in which 

 the local value of the figures increases in a 

 twelve-fold proportion (duodeni, twelve), 

 instead of in a ten-fold proportion, as in 

 the denary arithmetic. Thus in the duo- 

 denary scale 1111 expresses 12* + 12' -i- 

 12 -t- 1 = 1885 in the denary or common 

 scale. 



DUODE'NUM, Lat. from duodeni, twelve; 

 the name given by anatomists to the.first 

 portion of the small intestines, supposed 

 anciently, when anatomy was restricted 

 to the dissection of brutes, not to exceed 

 the breadth of twelve fingers. 



DU'PION, a double cocoon formed by two 

 or more silkworms. 



DU'PLE, Lat. duplus, double. Dupleratio 

 is that of 2 to 1 ; sub-duple ratio is the re- 

 verse, or that of 1 to 2. 



DU'PLEX, Lat. from duo and plico, to 

 fold; double or two-fold; applied to 

 leaves, petals, &c. of plants. 



DU'PLICATE, Lat. duplicatus, doubled; 

 applied, 1. In botany, to flowers which 

 have two rows of petals. - 2. In arith- 

 metic, both proportion or ratio of squares, 

 thus the duplicate ratio of a to b is the 

 ratio a a to b b, or of the square of a to the 

 square of b. 3. A duplicate is a copy of 

 some writing, deed, or account. 



DU'RA MA'TER. In anatomy, the tough 

 sero-nbrous membrane which invests the 

 brain externally to the arachnoid mem- 

 brane; thus named from being hard 

 (durus) compared with the pia mater 

 (q. v.). It is sometimes called the derma- 

 toid membrane. 



DUBA'MEN (Lat.) The fully formed 

 central layers of the wood of exogenous 

 trees, commonly known as heart-wood. 



DURAN'TE. In law, during, as durantt 

 beneplacito, during pleasure ; durante 

 vita, during life ; durante minore tetate, 

 during minority. 



DU'RATE. In music, a term applied to 

 whatever offends the ear by its effect. 



DUR'BAR, a Persian word used in India 

 for a court, where a sovereign or viceroy 

 gives audience. 



DCHE'SS (Norm, duresse, from dur, hard), 

 literally, hardship. In law, duress is of 

 two kinds, duress of imprisonment, which 

 is illegal restraint of personal liberty ; 

 and duress by menace or threat, in which 

 the person is threatened with personal 

 violence unless he perform some deed, as 

 signing of a bond. 



DUTCH'- DROPS, a preparation of oil of 

 turpentine, tincture of guaic, nitric ether, 

 and oils of amber and cloves. The balsam 



