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BRISTOL BAY-BRITANNIA.

first records of the history of B. speak of it under painting their bodies blue with woad), the ancient the ancient British name of Caer-oder; it then name of the island of Great Britain (see BRITANbecame a stronghold of the Romans; on their NICE INSULA). The Romans under Julius Cæsar departure, was again occupied by the Britons, (who wished to chastise the Britons for aiding the until, in 584, the Saxons drove them out, and Veneti, a tribe in Gaul, against the Roman power) giving it the name of Brightstowe or Bricstowe, invaded Britain in 55 and 54 B. C., but they did not, made it a thriving place of trade-aboriginal slaves for a hundred years afterwards, proceed with vigour being a principal item in the commerce. It was to subdue the country. After a desperate resistsacked by the Danes. Henry III. gave it the rights ance by the native British princes, especially of a corporate town; Edward III., those of a city Caractacus and Boadicea, the south half of Britain and county in itself. In 1247, the parishes of Red- was conquered by Vespasian, and made a Roman cliffe, Temple, and St Thomas were added to Bristol. province in the reign of Claudius, about 50 A.D. During the Civil Wars, it was alternately taken by Agricola, sent by Nero in 79 A. D., consolidated Royalists and Parliamentarians, and by the latter, these conquests, and extended the influence of the castle and fortifications were razed. It after- Rome to the Firths of Forth and Clyde, between wards became the principal port for trade with the which, in 84 A. D., he erected a chain of forts to West Indies, and carried on a flourishing business in repel the inroads of the northern Caledonians, in negro slaves. In 1793, the 'Bridge Riots' occurred. the line of the stone Wall of Antoninus, afterwards In 1804 the Docks were begun, and in 1809 they erected, in 140 A. D., by Lollius Urbicus. Agricola were opened to shipping. In 1831, the 'Reform Bill was the first Roman to sail round the island, and Riots' resulted in the destruction of the Bishop's the first Roman general to come in contact with Palace, Custom-house, Excise-office, jail, toll-houses, the Caledonians, whom, under their leader Galgacus, a number of private residences, and several lives. he overthrew, in 84 A. D., at a hill called the Mons The bill itself, by the addition of Clifton, &c., Grampius, the situation of which has not been gave the city its present municipal boundaries. satisfactorily determined. The Romans made many Among the names of note identified with the ineffectual attempts to subdue the Caledonian barhistory of B. are those of the Fitzhardinge family; barians, and penetrated, for this purpose, through William of Worcester; Canynge, the great merchant the north-east part of Scotland as far as the Moray and restorer of Redcliffe Church; Colston and Firth, as is attested by the remains of Roman Whitson, the merchants and philanthropists; Sebas- camps and stations still existing along their line of tian Cabot, the navigator, said to have anticipated march, and the relics of Roman art found in connecthe discovery of America by Columbus; the poets tion with them. Not only did the Caledonians on Southey and Chatterton; Lawrence and Baily, artists; their own soil resist the Roman sway, but by conSydney Smith, canon of Bristol Cathedral; Robert stant inroads into the Roman territory south of the Hall, Coleridge, and Hannah More; the Misses Wall of Antoninus, they so harassed the Romans Porter; Dr Prichard, Dr Carpenter, and Miss Mary themselves, that the latter were forced to abandon Carpenter. their conquests for 80 miles south of that wall, and to secure permanently their remaining conquests in South Britain by a line of defensive works between the mouth of the Tyne and the Solway Firth, called the Wall of Hadrian (q. v.), begun by Agricola in 80 A. D., strengthened by Hadrian in 121, and rebuilt and completed by Severus in 210 A. D. After this last date the Romans did not Ocean, in the south-west of England, between attempt to regain their lost provinces. Subject to South Wales on the north, and Devon and Somerset of the native British princes, and the invasion of these incursions of the Caledonians, the opposition shires on the south; or it may be regarded as an extension of the estuary of the river Severn. It tribes from the opposite shores of the continent, the is about 80 miles long and 5 to 48 miles broad, Romans held sway in Britain down to about 420 the greatest breadth being between St Gowan's A. D., soon after which time the Saxons invaded Head and Hartland Point, its most western and south of the Solway Firth and the mouth of south Britain, and ultimately subdued it. Britain, external points, this line passing through Lundy the Tyne, in the reign of Claudius, formed one Isle. It is the largest inlet or estuary in Britain, having a very irregular coast-line of 220 miles, and receiving a drainage of 11,000 square miles. The chief rivers which flow into it are the Towy, Taff, Usk, Wye, Severn, Avon, Axe, Parrot, Taw, and Torridge. The tides in it rise to an extra ordinary height-at Bristol, 35 feet; at King's Road, 40; and at Chepstow, sometimes 70. The rapid flow of the tides meeting the currents of the rivers produces, in the narrow parts of the Channel, and in the mouths of one or two of the rivers which enter it, the phenomenon of the bore, the tide advancing like a wall of water sometimes 6 to 9 feet high. The chief bays and harbours are, on the north, Caermarthen and Swansea Bays, Cardiff Roads, the mouths of the Usk and Wye, and the Severn estuary; and on the south, Bideford or Barnstaple, Morte, Ilfracombe, Combe Martin, Minehead, Porlock, and Bridgwater.

BRISTOL BAY, an arm of the Pacific Ocean, in Russian America, lying immediately to the north of the peninsula of Alaska. B. B. receives the waters of two considerable lakes, which, communicating with each other, offer an opening into the

interior.

BRISTOL CHANNEL, an inlet of the Atlantic

BRITAIN, GREAT. See GREAT BRITAIN. BRITAIN, NEW. See NEW BRITAIN. BRITANNIA (perhaps from Celtic brith or brit, painted, the ancient Britons being in the habit of

Roman province under a consular legatus and a procurator. Ptolemy mentions 17 native tribes as inhabiting this tract. Toward the close of the 4th C. A.D., Roman Britain constituted a diocese in the præfecture of Gaul, and was divided into five provinces, of which the boundaries, though uncertain, are supposed to have been as follows: B. Prima, England south of the Thames and the Bristol Channel; B. Secunda, Wales; Flavia Cæsariensis, the country between the Thames, Severn, Mersey, and Humber; Maxima Cæsariensis, the rest of England to the Scottish border; and Valentiasoon abandoned by the Romans-or Scotland south of the Wall of Antoninus. At this time, also, the inhabitants of Roman Britain included Phoenician, Roman, and Germanic elements, which had become incorporated with the native Britons, who were of Celtic or Gaelic descent. The Romans governed Britain by a vicarius or vicegerent resident at Eboracum (York), under whom were consulars, presidents, and other subordinate officers. To insure the obedience of the natives, at least three Roman legions-chiefly composed of Gauls, Germans,

BRITANNIA METAL-BRITANNIA TUBULAR BRIDGE.

on a globe or on an insulated rock, and leaning with one arm on a shield, the other hand grasping a spear or a trident. The first example of this personification is on a Roman coin of Antoninus Pius (died 161 A. D.). The figure reappears first on the copper coinage of England in the reign of Charles II. (1665); the celebrated beauty, Miss Stewart, afterwards Duchess of Richmond, is said to have served as model to the engraver, Philip Roetier. The Britannia that appears on the reverse of British copper coins since 1825 was the design of Mr W. Wyon. See COINAGE.

Iberians, and but few pure Romans-were stationed in Britain; viz., at Eboracum, Deva (Chester), and Isca Damnoniorum (Exeter). Under the Romans, many towns (colonia and municipia)-56 are enumerated by Ptolemy-arose in Britain, and diffused Roman law and civilisation over the country. The towns of Eboracum (York) and Verulamium (near St Albans) had the privileges of Roman citizenship. The Romans made many roads or streets (strata), of which there are still numerous remains, across the country, all centering in London. They also developed it into a corn-growing country. Druidism was the religion of the Britons at their conquest by the Romans, but the latter introduced Christianity and Roman literature into the country. There are many remains still extant of the presence of the Romans in Britain, such as camps, roads, ruins of houses, baths, flues, altars, mosaic pavements, painted walls, metallic implements and ornaments, weapons, tools, utensils, pottery, coins, sculptures, bronzes, inscriptions, &c. These remains shew that the Romans wished to render their British conquests permanent, and that they had greatly improved the arts of the variety of B. M., called Queen's Metal, is also ancient Britons, as is evident on comparing the extensively used for similar purposes, and it ranks remains with the far ruder native antiquities of intermediate in hardness between pewter and ordithe British pre-Roman or pre-historic era, such as nary B. Metal. Queen's Metal is composed of-tin, tumuli, barrows, earthworks, so-called Druidical 9; antimony, 1; bismuth, 1; and lead, 1. monoliths and circles, cromlechs, cairns, pottery, weapons, tools, utensils, ornaments, &c. Many of the Roman remains in Britain also shew that the Romans had introduced into the country the refinements and luxuries of Rome itself.

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BRITANNIA METAL is an alloy very largely of tea and coffee pots, tea-spoons, &c. The proemployed in the construction of the cheaper kinds portions of the metals used in its manufacture are is: tin, 85; antimony, 101; zinc, 3; and copper, 1. various, but the average composition in 100 parts B. M. is harder than pewter (q. v.), hence vessels or spoons made of it are not so liable to lose their shape, or to be indented with a slight blow.

BRITANNIA TUBULAR BRIDGE, a railway bridge over the Menai Strait, remarkable alike for its gigantic dimensions, and as being the first construction of the kind ever undertaken. With a view to facilitate communication with Ireland via Holyhead, the directors of the Chester and Holyhead Railway in 1845 sought the aid of Mr Robert Stephenson, the great engineer, to bridge the strait with such a structure as should admit of the safe passage of heavily laden trains without in any way interfering with the navigation of the channel About a mile above the suspension-bridge, and nearer Carnarvon, a rock in the middle of the strait rose ten feet above the water at low tide; and on this site, provided by nature, it was resolved to erect the bridge in the form of a rectangular tube, composed of wrought-iron plates riveted together in a manner to combine the greatest strength with the greatest lightness. See STRENGTH OF MATERIALS and TUBULAR BRIDGES. In the spring of 1846, the undertaking was commenced;

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by the 22d of June 1849, the Britannia Tower | erected on each side of the Britannia Tower; thus on the rock in the centre of the strait was completed (height, 191 feet 6 inches above high-water mark). Other two towers, some 18 feet lower, were

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dividing the space into four spans, of which the two centre ones are 460 feet each, the other two being comparatively narrow. The short tubes

BRITANNICE INSULÆ BRITISH ARMY.

between the abutments and the shore towers were constructed, by means of strong scaffolding and stages, in the places they were to occupy when finished; the long central tubes were built at the water-edge, from whence they were floated off on pontoons to the base of the towers, which had grooves or recesses made to receive them, and then elevated gradually (supports being built under their ends as they ascended) by powerful hydraulic presses to the requisite height, 102 feet above high-water mark. On the 13th of October 1849, the first long tube, 472 feet in length (12 feet being allowed for the rest at both ends), and about 1800 tons in weight, was safely fixed at its proper height above the sea. The other centre tube was got up by December; and on the 5th of March 1850, a train swept through, and the bridge was open for traffic. In August the parallel line of tubes was completed, and the up and down trains could now pass over the Menai with as little delay and danger as over any other part of the line. The total length of the bridge is 1841 feet, of the tubes, 1513 feet. The extreme height of the tube at the Britannia Tower is 30 feet, diminishing to 22 feet 9 inches at the abutments, 'the difference being made to give a true parabolic curve to the top while the bottom is straight.' Inside, the width is 13 feet 8 inches throughout, and the height 26 feet at the middle, and 18 feet 9 inches at the ends. To provide for the expansion and contraction of the metal, the bed-plates in the shore towers and in the abutments, on which the tubes rest, are made to move freely on cast-iron rollers and balls. This precaution, for securing free movement to the tubes, was not unnecessary, as it has been found that between the expansion of summer and contraction of winter there is a difference of fully 12 inches. The total weight of iron used was nearly 12,000 tons, of which the tubes contain 9360 tons of malleable iron, 1015 tons of cast iron, and 175 of permanent railway. In their fabrication 186,000 different pieces of iron, fastened together by more than 2,000,000 rivets, were used; and in the towers, abutments, &c., there is 1,492,151 cubic feet of masonry. The total cost was about £602,000. The whole structure was completed in less than five years. See TUBULAR BRIDGE

BRITANNICE INSULÆ, a term used by ancient classic writers previous to Cæsar for the British Isles, including Albion (England and Scotland), and Hibernia or Ierne (Ireland), with the smaller isles around them. Aristotle, in the beginning of the 3d c. B. C., knew only of Albion and Ierne. Cæsar, about 54 B. C., was the first to apply the name Britannia to Albion. Ptolemy, in the 2d C. A.D., is the first to apply Little Britain to Ierne or Ireland, and Great Britain to Albion or England and Scotland. Herodotus, in the 5th c. B. C., is the first writer to mention Britain with any sort of definiteness; previous Greek writers speak of Britain only in connection with the Phoenician tin trade carried on with the Cassiterides or Tin Isles (the Scilly Isles and Cornwall), which they often confound with the Azores. The Phoenician trade with the British Isles began about 1000 B. C., the Phoenicians giving the native Britons salt, skins, and bronze vessels in exchange for tin and lead. Ptolemy enumerates 52 different Celtic or Gaelic tribes as inhabiting Britain in his time. See CELTIC NATIONS.

BRITISH ARMY. In ARMIES, MODERN, a succinct account is given of the relative strength and organisation of the chief European armies, with the exception of that of the British empire, reserved for consideration in the present article.

Like other modern armies, the British army originated in the feudal system (q. v.). When

regal power, tempered by a parliament, superseded that system, the people, according to their rank in life, were expected to provide themselves with certain kinds of weapons and defensive armour. The justices of the peace were empowered to see to these military duties of the people. When the nation was either actually engaged in war, or apprehensive of invasion, the sovereign issued commissions to experienced officers, authorising them to draw out and array the fittest men for service in each county, and to march them to the sea-coast, or to any part of the country known to be in most danger. See ARRAYER. It was in the time of Henry VIII. that lord-lieutenants and deputy-lieutenants of counties were first appointed as standing-officers for assembling and mustering the military force. During the earlier years of the Tudors, contracts were made by the king with 'captains,' who undertook to provide, clothe, and feed so many fighting-men, for a given money-allowance; but the power intrusted to the lord-lieutenants gradually changed this system, in relation at least to home-defence. In the reign of Charles I., the important question arose, whether the king of England did or did not possess the right to maintain a military force without the express consent of parliament? and this question was all the more bitterly discussed when the king billeted his soldiers on the people. After the troubles of the civil wars and the Commonwealth, Charles II. found himself compelled to agree, on his Restoration, to the abandonment of all the army except a kind of body-guard or household brigade of 5000 men, sanctioned by the parliament. In the 13th year of his reign, he succeeded in obtaining a statute, declaratory that 'the sole and supreme power, government, command, and disposition of the militia, and of all forces by sea and land, and of all forts and places of strength, is the undoubted right of his majesty; and both or either of the Houses of Parlia ment cannot nor ought to pretend to the same.' Both Charles II. and James II. found, however, to their mortification, that this statute did not in effect give them so much real military command as they had wished and intended-because the Commons, by holding the purse, virtually held the power.

It was in the time of William and Mary that the real basis for the modern B. A. was laid.

The

DECLARATION OF RIGHTS (q. v.) settled, in positive terms, that the raising and keeping of a standing army in time of peace, without consent of parlia ment, is contrary to law.' The first MUTINY ACT (q. v.) was passed in 1689, to last for six months only; but it has been annually renewed ever since, except in three particular years; and it constitutes the warrant on which the whole military system of England is exercised by the Sovereign, with the consent of parliament. During a period of 172 years, with only three interruptions, the ministers of the crown have annually applied to parliament for permission to raise a military force, and for money to defray the expenses. The Sovereign can make war, and can bestow military employments and honours; but the steadiness with which the Commons have always regarded themselves as the representatives of the tax-paying nation has, in in the worst of times, on the grasping by courtiers of however imperfect a degree, provided a check, even lavish military privileges.

The great distinction between the B. A. and that of almost every other state in Europe, is that the service is voluntary. The subjects of the crown engage, by free choice, to serve in the army for a definite number of years. In the rare cases where forced service by ballot is obtained, it is in the militia, not the regular army. See MILITIA. The British soldier has much hard colonial life to bear,

BRITISH ARMY-BRITISH ASSOCIATION.

and many long voyages to make; he is, moreover, almost entirely shut out from the chance of being a commissioned officer. As a consequence, the ranks are mostly filled from the more necessitous classes of the community-by those who from want of steady habits, or of education, are the least fitted for industrious pursuits; whereas in France and many other foreign countries, the profession of arms is regarded as an honourable one, of which even the private soldier feels proud. Mr Fonblanque, comparing the peace establishments of the chief European armies in 1857, found that of England to be the smallest in ratio to population, but the most costly in relation to its strength. The English ratio was 1 in 128; the French, 1 in 95; the Prussian, 1 in 80; the Russian, 1 in 72; the Austrian, 1 in 68. English soldiers, officers, and men together, cost the country £52 each per annum; French, £36; Prussian, £31; Austrian, £18, 108.; Russian, £13, 58. The English cost per man is still higher now than it was in 1857, on account of increased attention being paid to the wellbeing of the soldier.

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Under the column 'India,' are included only those troops of the royal army which are lent to India, and paid for out of Indian revenues; the other military forces in that region are enumerated under EAST INDIA ARMY. Of the total 191,892 forming Her Majesty's forces, 9895 are officers; 20,767 noncommissioned officers, drummers, and trumpeters; and 161,230 rank and file. There are voted for the use of this army, 26,445 horses. The total cost cannot well be estimated per head; because, besides pay and sustenance for the soldiers, there are stores and wages for fortifications and military buildings, military weapons and combustibles, and the various kinds of half-pay and pensions. The total expenditure sanctioned by parliament may, however, conveniently be thrown under four headings, and given in round numbers as follows:

Pay and Allowances of Combatants,
Administration,

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Stores and Works of every kind,
Auxiliary Forces,
Pensions, retired Pay, &c.,.

£5,394,000 752,000 4,572,000

1,448,000

2,250,000

The B. A., in all its completeness, is supposed to be commanded by the Sovereign, assisted by the Secretary of State for War in some matters, and by the Commander-in-chief in others. The component elements are the household troops; the infantry of the line; the cavalry of the line; the ordnance corps, comprising artillery and engineers; and the marines. There are also certain corps raised in and belonging to the principal colonies; other bodies of troops, maintained out of the revenues of India; the militia; the yeomanry cavalry; the army of reserve; the volunteer artillery and rifles; the enrolled pensioners; and sometimes during war, foreign legions. The 'peace establishment' of the B. A. varies according to the political aspect of affairs abroad, and to the strength of the economising principle at home. In 1814, when England was engaged in tremendous contests abroad, the regular army reached 200,000 men, exclusive of fencibles, foreign legions, and militia. In the first few years after the termination of the great war against Napoleon, the reductions in the B. A. All the component elements of the army, in perinvolved the compulsory retirement of no less sonnel and matériel, and the organisation and duties than 10,000 military officers, who thereupon went of the troops, will be found noticed under their on half-pay; these, by filling vacancies, transfers, proper headings. The military forces actually withand deaths, have nearly disappeared. The elasticity in the United Kingdom-including all the various which permits the enlargement or contraction of kinds of force, but excluding the troops in the the army arises from varying, not so much the East Indies and 22,960 in the colonies-comprise number of regiments, as the number of battalions the following (1873):

in a regiment, of companies in a battalion, or of men in a company. If we compare the strength of the regular army at various periods between 1820 and 1873, we shall find that the actual number of regiments has varied but little, the difference of strength being made up in the three modes just mentioned.

The strength of the B. A. declined from 1815 to 1835, since which last-mentioned year it has undergone many augmentations. These augmentations have been occasioned partly by the contests in China, India, Kaffraria, Persia, and the Crimea; and partly by a sense of the insecurity of many of our coasts and colonies. In comparing the strength of the forces at different periods, much confusion is apt to arise from different modes of interpreting the words 'British army.' This designation may include the whole of the royal troops in India, whether supported out of imperial or of Indian revenues; it may include the militia, the volunteers, the enrolled pensioners, the yeomanry cavalry, the foreign legions or it may exclude any one or more of these. The 'British army,' and the military force of the British empire,' are often treated as convertible terms: to the production of much confusion where actual

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£14,416,000

being the charge for a peace establishment, in which, to admit of expansion for actual war, the upper ranks (which cannot be summarily created) are disproportionately large.

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If to these be added all the troops in India and abroad, and all the forces maintained by the colonies, the total swells up to little short of a million men trained or training to arms-of whom, however, the regulars of the home army, actually available for field-service, are only about 100,000.

BRITISH ASSOCIATION. An Association whose object is, by bringing together men eminent in all the several departments of science, to assist the progress of discovery, and to extend over the whole country the latest results of scientific research. A prevailing impression that England had fallen behind other countries, both as to the general estimation in which scientific men were held, and the prosecution of science itself, led to its formation. It was thought that an imposing union of men of science with the nobility, gentry, and clergy

BRITISH EMPIRE-BRITISH MUSEUM.

might tend to revive the philosophic spirit of the country. Such meetings had already taken place in Germany, and probably suggested the idea of this institution. Many leading-men of the age took part in its formation, but the honour of being its founder must be ascribed to Sir David Brewster. By his exertions the first meeting of those who were favourable to the design was held at York in the year 1831. The Archbishop of York, the mayor and council of the city, entered warmly into the project. At this meeting the constitution of the society was determined, the several sections had their provinces assigned to them, and subjects were proposed on which reports were to be drawn up and read at the ensuing meeting. This took place at Oxford in 1832. The university had cordially welcomed the new Association, the papers which were read gave it at once the high character it has since sustained, and from this date it may be said to have been in complete and successful operation. An enumeration of the several sections of the society, each of which has its own committee and president, will shew the wide range of topics it embraces: Section A., Mathematical and Physical Science; B., Chemistry; C., Geology; D., Zoology and Botany, including Physiology; E., Geography and Ethnology; F., Economic Science and Statistics; G., Mechanical Science.

At the close of each meeting, it is determined at what town in the United Kingdom the next shall be held, and a president of the whole Association is appointed, who delivers an inaugural address, in which he is expected to present a general survey of the latest advances of science. The rules and by-laws of the society, it is not necessary here to particularise; but it should be mentioned that the subscriptions of a continually increasing membership have placed at its disposal a large fund, which has been expended in the prosecution of science. In many cases, as in long astronomical calculations, or extensive meteorological observations, the labour of subordinates is required, and a certain apparatus, and it is in defraying such expenses that the funds of the B. A. are very wisely employed.

Besides the immediate ends sought to be obtained by such an Association, its utility will be evident if we reflect on the intimate connection that exists between the several branches of science, and the impossibility there is that any one mind can be thoroughly conversant with them all. He who now hopes to make discoveries in science must limit himself to a few chosen studies; and yet such is the interlacing of all the several branches of inquiry, that he must often find it indispensable to know the last results of each. The botanist or the physiologist must consult the accomplished chemist; the chemist must call in the aid of those who have specifically studied the action of heat, light, and electricity; the geologist needs them all, and is in turn consulted by all. Thus, a certain brotherhood of science is formed, in which each has his specialty, and yet each leans upon his brother.

In ancient times it was otherwise. The facts on which a philosopher speculated were those which lay open to the eyes of all. A Thales could see the rain fall and plants grow, and forthwith pronounce that the vital energy of all things was to be found in water. He could exercise his imagination in perfect independence of the labour of all other men. The philosopher of modern times cannot move a step without a careful consideration of the theories of his predecessors and contemporaries; he has to take notice of the innumerable facts brought to light by various observers, aided by those artificial arrangements which convert observation into experiment.

Two classes of men, of the most opposite character,

are greatly aided by an Association such as this. The humble and plodding workmen are taught where their patient industry will most avail; they are cautioned against re-discoveries; they are told where their love of collecting or experimentalising may be best applied. And that other class of men, who love to generalise, who ever seek to embrace all the multifarious facts of science under a few great laws

these are provided with the very last intelligence from every department of inquiry, and may forthwith proceed to weave it into their own comprehensive scheme. Nor are we to overlook the benefit which the whole community derives from the rapid dissemination of the latest results or speculations of philosophy. Not only do our idle and fashionable, as well as our manufacturing towns and our universities, welcome the meetings of the B. A., but from this Parliament of Science the utterance of scientific opinion goes forth over the whole kingdom through the agency of the press. Within three days after one of its meetings, there is not a workshop or a teatable in the country that has not derived from it a new topic of conversation. This kindling of an interest in science, through the whole population, we regard as amongst the greatest advantages of the British Association.

BRITISH EMPIRE. See GREAT BRITAIN and IRELAND.

BRITISH GUM, DEXTRINE, or LEI'OCOME, is a substance extensively employed by calicoprinters and others for the thickening of colours, instead of the much more expensive gum arabic. It is prepared from potato-starch (q. v.) or sagostarch by passing the grains through iron cylinders at a temperature about 500° F. It differs from starch in giving no blue colour with tincture of iodine, and in being readily soluble in water, and thus yielding a thick liquid resembling in consistence mucilage (strong solution of ordinary gum). B. G. is the material which is produced by baking in the crusts of loaf-bread (q. v.), and which communicates to them their very agreeable taste.

BRITISH MUSEUM. The British Museum, an important national institution in London, originated in a bequest of Sir Hans Sloane, who, during a long lifetime, gathered an extensive and, at the time, unequalled collection of objects of natural history and works of art, besides a considerable library of books and manuscripts. These, in terms of his will, were offered, in 1753, to the government, on condition that £20,000 should be paid to his family, the first cost of the whole having amounted to more than £50,000. The offer was accepted; the necessary funds were raised by a lottery! and the collection, along with the Harleian and Cottonian Libraries, were arranged in Montague House, which had been purchased for £10,250. The new institution, thenceforth called the BRITISH MUSEUM, was opened in 1759. From time to time, purchases and donations succeeded each other rapidly. Montague House sufficed for the reception of all these acquisitions, till the Egyptian antiquities arrived in 1801. The purchase of the Townley marbles in 1805, necessitated the erection of a gallery for their reception. This, however, did not meet the increasing demand for space. The old house was condemned, and plans were prepared by Sir R. Smirke for new buildings; but none were undertaken till 1823, when the eastern wing of the present building was erected for the reception of the library of George III., which had been presented to the Museum by George IV. The subsequent progress of the works was very slow. The building was completed in 1847. It is a hollow square, whose sides are opposite to the four points of the compass.

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