hence the mon père.' arge beak gular air compared he head, a s Viellot, g, like the and even as I can of which Nouveau iana. enlum. 609), represents this part as being clothed with a is naked. Cephalopterus. bill, as Temminck represents them, partly repose and over- CORAL. [POLYPARIA CORTICIFERA.] CORANTO, a quick dance. [COURANTE.] Bill strong, robust, mandibles nearly equal, the upper CORBEL, a projecting piece of stone, wood, or iron, The bird that furnished the description was brought to M. Geoffroy-Saint-Hilaire from Lisbon. M. Lesson states that the belief was that it came from Brazil, but that a wellinformed Portuguese had told him that it was from Goa. M. Vieillot says that the colour of the naked skin of the neck is cerulean blue. Mr. Swainson, in his Natural History and Classification of Birds,' London, 1836, says, 'The crest of this extraordinary bird is immensely large, advancing so far in front as to touch the end of the bill, and it is compressed in the same manner as that of Rupicola; but the ends of the feathers, instead of meeting so as to form a sharp ridge, suddenly recede from each other, curve outwards, and form a most elegant drooping line of plumes, hanging over on the sides, so as to shade the face like an umbrella. The figures that have hitherto been given of this rare bird are all taken from the specimen in the Paris Museum, and which has been sadly distorted in the setting up. A minute examination of this specimen has convinced us that the frontal feathers, instead of being raised over the [Cephalopterus ornatus. modern island of CORFU. Though the name is written CORCY'RA (Képrupa, Kerkúra), the Roman name of the Kerkura in the Greek authors, it seems that all the extant coins have KOPKYPA (Korkura). [CORFU.] [Coin of Corcyra.] British Museum. Actual size. Silver. Weight, 76 grains." fixed at the two extremities and stretched with force suffiCORD, frequently spelt chord, means an elastic string cient to enable it to yield a musical note. [AcouSTICS, vol. i., p. 97. Throughout this article A means the article Acoustics, and the page and column of vol. i. are referred to.] The close analogy which exists between a string and a column of air in a state of vibration would require more space to elucidate properly than this subject will allow us to give: we shall therefore assume some results of mathematical reasoning, point out the probability of those results, and consider the theory of the vibrating cord independently. Firstly, we suppose our cord to be of uniform thickness and density, so that any given length is precisely of the same quality, from what part soever of the string it may be cut. The want of this condition being practically fulfilled is sometimes sensibly felt in violin and violoncello strings, which are then called false. A player whose intonation is perfect upon a perfect string, has to learn a new instrument when he attempts to play with a false string; to say nothing of the harmonics which must be heard more or less becoming discordant. Let us first suppose a string of indefinite length, and not so acted upon by gravity as to hang downwards, stretched at the two ends by equal weights. The string is a cylinder of uniform diameter and density. Let us next suppose that a part of the string is placed on a mould which catches two points and holds them fast, and stretches the intermediate part into a curve which differs very little from a straight line. Let the mould be suddenly removed, and let us further suppose that, in removing it, we are able to communicate any velocities we please to the different points of the stretched part. We have then, at the moment of starting, a system represented in the following diagram, where AB (dotted) represents the part in question before the mould was applied, and it is ACB the instant the mould is taken away, all the points between A and B being in a state of motion upwards or downwards. The string will not remain an instant in its present state: the first presumption is that the moment the points A and B are set free a disturbance will take place in the parts of the string both between P and A, and between Q and B, the disturbance travelling from A towards P as well as from B towards Q. The first point in which we are interested is this: with what velocity will the disturbance be propagated? and the answer is, that the disturbance travels throughout the string with the same velocity, depending upon its material and the weight with which it is is stretched, according to the following law: Let each of the equal weights P and Q be as heavy as c feet of the string: then the velocity of communication is so many feet per second as a bullet would acquire, if it were allowed to fall in vacuo down a perpendicular of c feet, or 2ge where g is the velocity which gravity communicates in one second, or 32 feet. For instance, let the string be iron wire, every cubic foot of which weighs 7200 ounces avoirdupois. Let the diameter be one-twentieth of an inch, and let the weights P and Q be each 20 pounds or 320 ounces. Then the weight of x feet of the string is (of an inch being of a foot) 3.14159 × () x x x 7200 ounces which made equal to 320 gives x = 3259.5 feet and √2 × 32 × 3259.5 = 457.93 = 458 nearly, or 458 feet per second is the rate at which the disturbance is communicated. [CYLINDER.] pensate each other throughout. But let a time elapse during which the direct and retrograde disturbances travel to M and L. Then the form of the string at that moment will be Ac mnc B, where the part m n arises from the composition of the two parts of the disturbances which yet remain acting on the same points. (See another in stance of composition, A. 92.) We may thus trace the effect of disturbance upon an in duce no musical sound, for which (A. 95,2) it is necessary definitely extended string; but such a string would prothat there should be a continued reiteration of the same posing a finite string, stretched at the ends, we must ask action upon the air repeated at equal intervals. Now supwhat takes place when the disturbance comes to the end of the string. And from mathematical analysis again, the following is the answer: Let P be the fixed end of the PH H B string, and choose the instant at which, had the string con- In fact, We now ask what is the nature of the disturbance communicated. It suggests itself as possible, that there may be some species of disturbances which travel only in one direction: for instance, that we might so proportion the velocities of the disturbed points to their positions, that AP should remain undisturbed, that the points from A towards the right should drop one after another into their places, while those from B to Q should be successively disturbed. The answer, again derived from mathematics, is, that such disturbance is possible, and that the conditions under which it will take place are: 1. That C being the highest of the disturbed points, all the points from A to C must be moving downwards at the first instant, and all those from B to Q upwards. 2. That the velocity of the points must be as follows: At any point R draw a tangent RT to the curve of disturbance. Then the velocity of the point R must be such as would, if continued uniformly, carry the point R from R to N or from N to R in the same time as the whole disturbance is propagated from T to N. These conditions being fulfilled, we may represent the successive states of the string by cutting out a piece of paper of the form ACB, and carrying it along the string PQ at the uniform rate per second which we have found for the propagation of the sharply struck near one end. It is altogether a gratuitous disturbance. If the directions of the velocities be all re-assumption, knowing what we do of the imperfect elasticity Now let us suppose a string like that of a piano-forte, versed, then the disturbance travels from B towards P. Let of matter, to suppose that the disturbing effect of the blow us call such disturbances simple; and with respect to the immediately affects the whole string. A certain disturb direction in which they travel, direct or retrograde. We further learn from mathematical analysis, that any dis- of the string. Then what is that perceptible phenomenon, ance is produced upon a part (it may be a very small part) turbances whatsoever, taking place upon the same points the reiteration of which produces a musical tone? at the same instant, produce a compound disturbance of suppose the string struck at one-fourth of the length from which the values of RN and the velocities at the point R in its end, and suppose that the tension is such that disthe compound disturbances are the algebraical sums of the turbance is propagated at the rate of 2000 feet a second, the values of RN, &c., in the component disturbances. And length being four feet. A disturbance is produced at M, moreover, that any disturbance whatsoever, be the law of its form and velocities what it may, can be compounded of two simple disturbances, one direct and one retrograde. So that the moment the mould is removed, the disturbances will begin to travel in different ways. not completely separated, there will be points remaining As long as they have under the effects of both; but when they have had time to separate completely, we should, were the rapidity of transmission not too great, see the direct disturbance travelling by itself in one direction and the retrograde in the other. To illustrate this, suppose we wish to ascertain the effect of the disturbance ACB, as drawn, the velocities throughout being nothing at all at the instant the mould is withdrawn. The two simple disturbances which would produce P M Let us wards P and Q, at which they are reflected with the same from which two simple disturbances begin to travel tovelocities. They will be at N together producing a disturbance (now recompounded) of the same amount as before, but on the opposite side of the string. This takes is repeated 250 times per second. From M to N there is place while four feet are described at 2000 feet per second, or then a succession of effects upon the air, which are most powerful at M and N, owing to the coincidence of the disturbances. This is repeated 250 times in a second, and By supposing the whole string put in vibration, or any simultaneous disturbances communicated to it, the effect may similarly be shown to be, that at the end of the time during which disturbance would be propagated along the whole string the effects are all reversed, but are of the same magnitude; while in a second of such time they are all restored. We thus easily arrive at what is called the fundamental sound of a string. With regard to the harmonics (A. 96-2) of a string [HARMONICS], they are not so easily shown to be necessary. We shall, however, first show that such effects are always possible; that is to say, that if a string begin to vibrate so that its two halves, or its three thirds, &c. are disturbed together, such an effect will be produced. Suppose, for instance, the initial state of the string to be PM NQ, where PM, MN, and NQ are the revolutionists struck deep root in her enthusiastic mind; and her zeal for their establishment was heightened after the rise of the Jacobins, and the overthrow and proscription of the Girondists, May 31, 1793, by the presence and conversation of those chiefs of the latter party who fled into Normandy, in hope to rouse the people in their favour. Resolved to advance the cause which she had at heart by some extraordinary action, Charlotte Corday travelled to Paris, where, having gained admission to the galleries of the Convention, she was still more incensed by the threats and invectives which she heard showered upon her own friends. I have Being thus confirmed in the determination to assassinate one of the principals of the dominant faction, whether to deter them by terror, as an act of revenge, or as an example of what she regarded public justice, she chose Marat, one of the most violent and bloody of the Jacobins, to be her victim. After two unsuccessful attempts, she obtained admission to the chamber in which he was confined by illness, July 15, under pretence of communicating important news from Caen; and being confirmed in her purpose by his declaration that in a few days the Girondists who had fled thither should be guillotined in Paris, she suddenly stabbed him to the heart: he gave one cry and expired. Being immediately arrested and carried before the tribunal revolutionnaire, she avowed and justified the act. killed one man, she exclaimed, raising her voice to the utmost, to save a hundred thousand; a villain, to rescue innocents; a wild beast, to give peace to my country. I was a republican before the revolution, and I have never been wanting in energy. (Mignet, vol. ii., p. 5.) withstanding her confession, the court, with an affectation of impartiality which in this case could be ventured on, assigned her a defender, and went through all the formalities of trial. The speech of her advocate is rather remarkable. He neither denied nor extenuated the act; and acknowledged it to have been long premeditated. everything, and seeks no means of justification; this, citizen-judges, is her whole defence:-this imperturbable calmness, this total self-abandonment- these sublime feelings, which, even in the very presence of death, show no sign of remorse, are not natural. It is for you, citizenjudges, to fix the moral weight of this consideration in the scales of justice.' thirds. During the time in which the direct disturbance of The time of vibration of a string, that is, of complete Not 'She avows You Charlotte Corday returned thanks to the pleader. have seized, she said, the true view of the question: this was the only method of defence which could have become me.' She heard her sentence with perfect calmness, which she maintained to the last moment of life. Her personal charms were of a high order; and her beauty and animation of countenance, even during her passage to execution, added greatly to the interest inspired by her courage and loftiness of demeanour. She was guillotined July 17, 1793. (Biog. Univ.; Montgaillard, Hist. de France, &c., vol. iv., p. 55-59.) CORDELIERS, so named from wearing a knotted cord for a girdle, were the strictest branch of the Franciscan or Grey Friars. Chaucer mentions them in the 'Romant of the Rose,' 1. 7461, but they were not much known by this appellation in England. The name Cordeliers is said to have been first given to certain Franciscans (at that time but recently established) who accompanied the army under St. Louis to the Holy Land. They served in a Flemish corps, the commander of which considered it his duty to report to the king not only their bravery, but their zeal in re-animating the soldiers of his division, who had been on the point of giving way. The king inquired the designation of the pious men, but the officer had lost his recollection of it; he could only say that they were those 'qui sont liés de corde.' From this they received the new appellation of Cordeliers. St. Louis, upon his return to France, gave great encouragement to these Franciscans, and founded a convent for them in Paris. There were ultimately, according to Moreri, no fewer than 284 male and 123 female convents of Cordeliers in that country. (Moreri, Dict. Historique, chiefly from Hermant, Histoire des Ordres Religieux.) In all that has preceded we have supposed the string A single string fitted up for experiments is called a CORD (in music). [CHORD.]' CORDIA CEÆ, a small natural order of Monopetalous exogens, with a shrubby or arborescent habit, a gyrate inflorescence, and a drupaceous fruit. The leaves are alternate, usually covered with asperities, and destitute of stipules. The calyx is inferior and five-toothed; the corolla regular, with five stamens proceeding from the tube, and alternate with the segments. There is a pendulous ovule in each cell, and the style is twice-forked. The cotyledons are crumpled or folded in plaits lengthwise. The affinity of the order is almost equal between Boraginacea and Convolvulaceæ, but preponderates in favour of the former. The only economical plants contained in it are the Sebesten plums, the produce of Cordia Myxa and Sebestena, the rind of which is succulent and mucilaginous. All the species are tropical. CORDON, a military term to denote a line of posts and sentries placed around a district or town to prevent any communication between it and the rest of the country. It is chiefly resorted to in cases of any contagious disease having broken out in a place, when it is called a cordon sanitaire; and in order to be effectual, each sentry ought to be able to see his two next comrades right and left. This can be done more easily in the day-time by taking advantage of commanding positions or open grounds; but at night the sentries must necessarily be more numerous and nearer each other. Cordon in French means also the insignia of an order of knighthood, answering to the English word riband when taken in a similar sense: cordon bleu,'' blue riband,' &c. CORDONNIERS, originally cordouanniers, cordwainers in English, a word derived from cordoban, the soft tanned leather used for the upper part of shoes, which was first brought from Cordova in Spain, where it was manufactured by the Moors. A society existed at Paris in the sixteenth and seventeenth centuries, under the name of Frères Cordonniers, consisting of the shoemakers of that city, who formed a company, having their magistrates and other officers, and a common treasury, from which the indigent of their own trade were supported. The society was placed under the protection of St. Crispin, who had been himself one of the same trade. CO'RDOVA, or more properly CO'RDOBA (Corduba, Colonia Patricia, and simply Patricia), was the birthplace of the two Senecas and Lucan. Cicero in his oration for Archias speaks rather disparagingly of the Cordubese poets of his day. Under the Spanish caliphs it became the first seat of learning and the terror and admiration of Europe, from 755 to 1234, when Ferdinand III. of Castile took it. It then contained 300,000 inhabitants. Soon after, in 1238, he repelled its masters, the Moors, as far as Granada, and prepared their total overthrow, which Ferdinand and Isabella accomplished in 1492. Of all the Asiatic grandeur of that empire there is only left its first mosque, which is unique in its kind, but has been partly defaced by its transformation into a Christian cathedral, more particularly since 1528, when some of its 1000 columns were destroyed to erect a chapel in the centre. Cordova was also the centre of an extensive trade, and noted for the preparation of the goat skins called cordoban, a word corrupted into our cordwain, whence shoemakers derived in England their old name of cordwainers, and in France that of cordouanniers, and at last cordonniers. Although Cordova has sunk into decay under the Christians, it has not ceased to produce literary men, among whom are Juan de Mena, Fernan Perez de Oliva, Ambrosio Morales, Góngora, &c. The great captain, although called Gonzalo de Cordoba, was a native of Montilla. Cordova at present contains only 45,000 inhabitants within its vast Roman and Moorish inclosure. The plaza mayor, or great square, is remarkable for its size, regularity, and neat piazzas. The bishop's palace is a massive build ing. That of the Moorish kings is now turned into stables for stallions of the renowned Cordovese breed. The town is situated on the north bank of the navigable river Guadalquivir, at the commencement of the finest plain of Andalusia, and on a gentle declivity which descends from the Sierra Morena, and shuts out the north and east winds. The climate of Cordova is delightful and healthy, and the soil extremely fertile. It is 75 miles north-east of Seville, 120 north-east of Cadiz, and 180 south-south-west of Madrid. It is in 37° 52′ N. lat., 4° 45′ W. long. (Ponz, Viaje de España; Laborde, View of Spain, vol. ii., p. 29; Gibbon's Rome; Talbot's Travels; Fisher's Travels, &c.) COREA, is a large peninsula on the eastern coast of Asia, whose sovereign is tributary to the emperors of China and Japan, but otherwise independent. The peninsula is surrounded on the east by the sea of Japan, on the south by the straits of Corea-which divides it from the Japanese island of Kiou-siou-and on the west by the Hoang-Hai, or Yellow Sea, which separates it' from China Proper. It extends, from south to north, from 34° to 40° N. lat., or about 420 miles; but the countries north of the peninsula, as far as 43°, are also subject to the sovereign of Corea, so that the whole country from south to north may be 630 miles. Its width, lying between 124° and 134° E. lat., varies from 100 to 200 miles. Its area may be about 90,000 square miles, or somewhat more than Great Britain. Corea appears to be a very mountainous country. On its northern boundary is the Chang-pe-shan, a high mountainrange, partly covered with snow, which separates the Coreans from their northern neighbours, the Manchoo. From this chain another branches off in a south-south-east direction, which traverses the whole of the peninsula as far as the strait of Corea. Its highest part is near the shores of the sea of Japan, towards which it descends with great rapidity; and in this part the level or cultivable tracts are of small extent. The numerous offsets to the west, which are less elevated and steep, contain between them large and well-cultivated valleys. The largest rivers occur in the northern part of the country, where the Thumen-Kiang, rising in the centre of the Chang-pe-shan, runs north-east, and towards its mouth east. It falls into the sea of Japan. Its banks, though fertile, are uninhabited, in conformity to the order of the Chinese emperor; the object of this policy being to have a well-settled boundary between Corea and the Manchoo. The Yalukiang rises nearly in the same place, and runs first west, then south. It falls into the Hoang-Hai, according to the Chinese geographers, with twelve mouths. It is said to be navigable for junks 35 miles (100 lees), and for barges about 180 miles (520 lees). The rivers which traverse the valleys of the peninsula have a short course. The coasts of Corea are high and bold, except in the innermost recesses of the numerous bays and harbours. There are few islands along the eastern shores, except in Broughton's Bay (39° 30' N. lat.), where they are numerous. In the strait of Corea they are also very numerous, and still more so between the island of Quelpaerts and the southern coast. Between 34° and 35° N. lat. and 125° and 126° E. long., Captain Maxwell found the sea literally dotted with islands and rocks, which he called the Corean Archipelago, and the most south-western group Amherst Isles. Farther north (38° N. lat.) is another group, called James Hall's Archipelago. These islands are rocky and high, but generally inhabited. They are rarely more than three or four miles in length. The largest, the island of Quelpaerts, south of the peninsula, is about sixty miles in circuit, and in the centre a peak rises upwards of 6000 feet above the sea. Corea is a very cold country. For four months the northern rivers are covered with ice, and barley only is cultivated along their banks. Even the river near King-ki-tao freezes so hard that carriages pass over the ice. In summer the heat appears not to be great. On the eastern coasts fogs are frequent; and La Perouse thinks he may compare them in density with those along the coasts of Labrador. Rice is extensively cultivated on the peninsula, as well as cotton and silk, which are employed in the manufac tures of the country, and exported in the manufactured state. Hemp is also cultivated, and in the northern district ginseng is gathered. Tobacco is raised all over the country. Horses and cattle are plentiful on the mountain-pastures The former, which are small, are exported to China. In the northern districts the sable and other animals give fur. The royal tiger, which is a native of the country, is covered with a longer and closer hair than in Bengal. On the eastern coast whales are numerous. It seems that Corea is rich in minerals. Gold, silver, iron, salt, and coals, are noticed in the Chinese geography. The inhabitants, who are of the Mongol race, resemble the Chinese and Japanese, but they are taller and stouter. Among them are some whose appearance seems to indicate a different origin. They speak a language different from the Chinese and Manchoo, though it contains many Chinese words. They have also a different mode of writing it, though the Chinese characters are in general use among the upper classes. In manner and civilization they much resemble the Chinese, and are likewise Buddhists. Education is highly valued, especially among the upper classes. They seem to have a rich literature of their own, but their language is very imperfectly known in Europe. The valleys seem to be well peopled; but we are so little acquainted with the interior, that hitherto nobody has ventured to give an estimate of the population. north, from he countries abject to the om south to etween 124 5. Its area more than ry. On its mountainarates the Manchoo. -south-east ninsula as the shores with great tracts are st, which large and Fushan, according to the Chinese geography, called by Broughton Chosan or Thosan, is a bay at the south-eastern extremity of the peninsula, opposite the Japanese island of Tsu-sima, at the innermost recess of which the town of King-tsheou is built, which carries on an active trade with Japan, and is the only place to which the Japanese are permitted to come. In industry the Coreans do not appear to be much inferior to the Chinese and Japanese. They mainly excel in the manufacture of cotton cloth and cotton paper, both of which are brought in great quanties to Peking. Other manufactured articles which are exported are silk goods, plain and embroidered, and mats. They have attained considerable skill in working iron, as swords are sent, with other articles, to the emperor of China as tribute. King-ki-tao, the capital, which is a few miles north of a | by a third set; and the fourth was published in 1694. His No country is less accessible to Europeans than Corea. We know nothing of the political condition of the coun- CORELLI, ARCA'NGELO, on whom his countrymen No. 468. Corelli's greatest work, his Concerti Grossi, or Twelve Concertos, were written many years before they appeared in print. They were engraved in score at Amsterdam, and published in December, 1712, six weeks only before their author breathed his last, an event which took place on the 18th of January, 1713. He was buried in the church of Santa Maria della Rotunda (the antient Pantheon), where a monument, with a marble bust, is erected to his memory, near that of the greatest of painters, Raffaelle. On the pedestal is a Latin inscription by the cardinal Ottoboni, which records in simple and elegant terms the merits of the composer and the friendship of the writer. Like many other original geniuses, Corelli was too sensitive to be happy. Occurrences which he should have suffered to pass unnoticed made a deep impression on him, even to the injury of his health. The success of Valentini, whose concertos and performance, though infinitely inferior to Corelli's, became fashionable at Rome, so much affected the great composer-who, having acquired much wealth, ought to have treated fashion with the disdain it generally deserves-that it is supposed to have aggravated the malady which caused his death. Corelli's best works are imperishable. Rousseau has said, that he who without tears can listen to Pergolesi's Stabat Mater may feel assured that he has no genius for music. We will also risk an assertion-that those who can without admiration hear the eighth concerto of Corelli, as performed at the Antient Concert, though they may be able to boast great powers of execution as instrumentalists or vocalists, can have no perception of the higher beauties of composition-can possess no soul for pure harmony. CORFE CASTLE. [DORSETSHIRE.] CORFU, the island of, the antient Corcyra, lies off the coast of Epirus, from which it is separated by a channel of very irregular width, being fourteen miles in some places, eight miles opposite the town of Corfu, and only two at its north outlet near Butrinto. The length of the island, which describes a slight curve from Cape St. Catharine, |