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ARTICLE BOROUGH: "In London in the 13th century there was a regular system for the admission of new members to the borough..." 'London' amended from 'Londom'.

ENCYCLOPAEDIA BRITANNICA

A DICTIONARY OF ARTS, SCIENCES, LITERATURE AND GENERAL INFORMATION

ELEVENTH EDITION

Borgia, Lucrezia to Bradford, John

ARTICLES IN THIS SLICE:

BORGLUM, SOLON HANNIBAL , American sculptor, was born in Ogden, Utah, on the 22nd of December 1868, the son of a Danish wood-carver. He studied under Louis F. Rebisso in the Cincinnati art school in 1895-1897, and under Fr?miet in Paris. He took as his chief subjects incidents of western life, cowboys and Indians, with which he was familiar from his years on the ranch; notably "Lassoing Wild Horses," "Stampeding Wild Horses," "Last Round-up," "On the Border of White Man's Land," and "Burial on the Plains." His elder brother, Gutzon Borglum , also showed himself an artist of some originality.

BORGU, or BARBA, an inland country of West Africa. The western part is included in the French colony of Dahomey ; the eastern division forms the Borgu province of the British protectorate of Nigeria. Borgu is bounded N.E. and E. by the Niger, S. by the Yoruba country, N.W. by Gurma. The country consists of an elevated plain traversed by rivers draining north or east to the Niger. The water-parting between the Niger basin and the coast streams of Dahomey and Lagos runs north-east and south-west near the western frontier. In about 10? N., below the town of Bussa, rapids block the course of the Niger, navigable up to that point from the sea. The soil is mostly fertile, and is fairly cultivated, producing in abundance millet, yams, plantains and limes. The acacia tree is common, and from it gum-arabic of good quality is obtained. From the nut of the horse-radish tree ben oil is expressed. Cattle are numerous and of excellent breed, and game is abundant. Borgu is inhabited by a number of pagan negro tribes, several of whom were dependent on the chief of Nikki, a town in the centre of the country, the chief being spoken of as sultan of Borgu. The king of Bussa was another more or less powerful potentate. In the early years of the 19th century Borgu was invaded by the Fula , but the Bariba maintained their independence. In 1894 Borgu became the object of rivalry between France and England. The Royal Niger Company, which had already concluded a treaty of protection with the king of Bussa, sent out Captain F.D. Lugard to negotiate treaties with the king of Nikki and other chiefs, and Lugard succeeded in doing so a few days before the arrival of French expeditions from the west. Disregarding the British treaties, French officers concluded others with various chiefs, invaded Bussa and established themselves at various points on the Niger. To defend British interests, the West African Frontier Force was raised locally under Lugard's command, and a period of great tension ensued, British and French troops facing one another at several places. A conflict was, however, averted, and by the convention of June 1898 the western part of Borgu was declared French and the eastern British, the French withdrawing from all places on the lower Niger.

The British portion of Borgu has an area of about 12,000 sq. m. Up to the period of inclusion within the protectorate of Nigeria little or nothing was known of the country, though there were interesting legends of the antiquity of its history. The population was entirely independent, and resisted with success not only the Fula from the north but also the armies of Dahomey and Mossi from the south and west. Travellers who attempted to penetrate this country had never returned. Since 1898 the country has been opened, and from being the most lawless and truculent of people the Bariba have become singularly amenable and law-abiding. Provincial courts are established, but there is little crime in the province. The British garrisons have been replaced by civil police. The assessment of taxes under British administration was successfully carried out in 1904, and taxes are collected without trouble. In south Borgu the people are agricultural but not industrious or inclined for trade. In the north there are some pastoral settlements of Fula. The Bariba themselves remain agricultural. Cart-roads have been constructed between the town of Kiama and the Niger. The agricultural resources of Borgu are great, and as the population increases with the cessation of war and by immigration the country should show marked development. Shea trees are abundant. Elephants are still to be found in the fifty-mile strip of forest land which stretches between the Niger and the interior of the province. The forest contains valuable sylvan products, and there are great possibilities for the cultivation of rubber. There are also extensive areas of fine land suitable for cotton, with the waterway of the Niger close at hand. Labour might be brought from Yorubaland close by, and a Yoruba colony has been experimentally started.

The chief source of boric acid for commercial purposes is the Maremma of Tuscany, an extensive and desolate tract of country over which jets of vapour and heated gases and springs of boiling water spurt out from chasms and fissures. In some places the fissures open directly into the air, but in other parts of the district they are covered by small muddy lakes . The soffioni contain a small quantity of boric acid , together with a certain amount of ammoniacal vapours. In order to obtain the acid, a series of basins is constructed over the vents, and so arranged as to permit of the passage of water through them by gravitation. Water is led into the highest basin and by the action of the heated gases is soon brought into a state of ebullition; after remaining in this basin for about a day, it is run off into the second one and is treated there in a similar manner. The operation is carried on through the entire series, until the liquor in the last basin contains about 2% of boric acid. It is then run into settling tanks, from which it next passes into the evaporating pans, which are shallow lead-lined pans heated by the gases of the soffioni. These pans are worked on a continuous system, the liquor in the first being concentrated and run off into a second, and so on, until it is sufficiently concentrated to crystallize. The crystals are purified by recrystallization from water. Artificial soffioni are sometimes prepared by boring through the rock until the fissures are reached, and the water so obtained is occasionally sufficiently impregnated with boric acid to be evaporated directly. Boric acid is also obtained from boronatrocalcite by treatment with sulphuric acid, followed by the evaporation of the solution so obtained. The residue is then heated in a current of superheated steam, in which the boric acid volatilizes and distils over. It may also be obtained by the decomposition of boracite with hot hydrochloric acid. In small quantities, it may be prepared by the addition of concentrated sulphuric acid to a cold saturated solution of borax.

Borax and boracic acid are feeble but useful antiseptics. Hence they may be used to preserve food-substances, such as milk and butter . In medicine boracic acid is used in solution to relieve itching, but its chief use is as a mild antiseptic to impregnate lint or cotton-wool. Recent work has shown it is too feeble to be relied upon alone, but where really efficient antiseptics, such as mercuric chloride and iodide, and carbolic acid, have been already employed, boracic acid may legitimately be used to maintain the aseptic or non-bacterial condition which they have obtained. Borax taken internally is of some value in irritability of the bladder, but as a urinary antiseptic it is now surpassed by several recently introduced drugs, such as urotropine.

BORING. The operations of deep boring are resorted to for ascertaining the nature, thickness and extent of the various geological formations underlying the surface of the earth. Among the purposes for which boring is specifically employed are: prospecting or searching for mineral deposits; sinking petroleum, natural gas, artesian or salt wells; determining the depth below the surface of bed-rock or other firm substratum, together with the character of the overlying materials, preparatory to mining or civil engineering operations; carrying on geological or other scientific explorations.

Prospecting by boring is practised most successfully in the case of mineral deposits of large area, which are nearly horizontal, or at least not highly inclined; e.g. deposits of coal, iron, lead and salt. Wide, flat beds of such minerals may be pierced at any desired number of points. The depth at which each hole enters the deposit and the thickness of the mineral itself are readily ascertained, so that a map may be constructed with some degree of accuracy. Samples of the mineral are also secured, furnishing data as to the value of the deposit. While boring is sometimes adopted for prospecting irregular and steeply inclined mineral deposits of small area, the results are obviously less trustworthy than under the conditions named above, and may be actually misleading unless a large number of holes are bored. Incidentally, bore-holes supply information as to the character and depth of the valueless depositions of earth or rock overlying the mineral deposit. Such data assist in deciding upon the appropriate method for, and in estimating the cost of, sinking shafts or driving tunnels for the development and exploitation of the deposit. In sinking petroleum wells, boring serves not only for discovering the oil-bearing strata but also for extracting the oil. This industry has become of great importance in many parts of the United States, in southern Russia and elsewhere. Rock salt deposits are sometimes worked through bore-holes, by introducing water and pumping out the solution of brine for further treatment. The sinking of artesian wells is another application of boring. They are often hundreds, and sometimes thousands, of feet in depth. A well in St Louis, Missouri, has a depth of 3843 ft.

Boring is useful in mines themselves for a variety of purposes, such as exploring the deposit ahead of the workings, searching for neighbouring veins, and sounding the ground on approaching dangerous inundated workings. In the coal regions of Pennsylvania, bore-holes are often sunk for carrying steam pipes and hoisting ropes underground at points remote from a shaft.

Several of the methods of boring in soft ground are employed in connexion with civil engineering operations; as for ascertaining the depth below the surface to solid rock, preparatory to excavating for and designing deep foundations for heavy structures, and for estimating the cost of large scale excavations in earth and rock.

Lastly, a number of deep holes have been bored for geological exploration or for observing the increase of temperature in depth in the earth's crust; for example, at Paruschowitz, Silesia, about 6700 ft. deep; at Leipzig, Germany, 6265 ft.; near Pittsburg, Pennsylvania, 5532 ft.; and at Wheeling, West Virginia, nearly 5000 ft. The two last mentioned were intended to obtain as complete a knowledge as possible of the bituminous coal and oil-bearing formations.

There are five methods of boring, viz.: by earth augers, drive pipes, long, jointed rods and drop drill, the rope system, in which the rods are replaced by rope, rotary drills. The first two methods are adapted to soft or earthy soils only; the others are for rock.

In boring by hand, the practical limit of depth is soon reached, on account of the increasing weight of the rods. For going deeper a "spring-pole" may be used. This is a tapering pole, say 30 ft. long and 5 or 6 in. diameter at the small end. It rests in an inclined position on a fulcrum set about 10 ft. from the butt, the latter being firmly fixed. The rods are suspended from the end of the pole, which extends at a height of several feet over the mouth of the hole. With the aid of the spring of the pole the strokes are produced by a slight effort on the part of the driller. Average speeds of 6 to 10 ft. per 10 hours are easily made, to depths of 200 to 250 ft.

The chief point of difference from rod-boring is the substitution of rope for the jointed rods. For deep boring it possesses the advantage of saving the large amount of time consumed in raising and lowering the rods, as required whenever the hole is to be cleaned out, or a dull bit replaced, since the tools are rapidly run up or down by means of the rope with which they are operated while drilling. The speed of rope-boring is therefore but little affected by increase of depth, while with rod-boring it falls off rapidly. In its simplest form the so-called "string of tools," suspended from the rope, is composed of the bit or drill, jars and rope-socket. The jars are a pair of sliding links, similar to those used for rod-boring, but serving a different purpose, viz. to produce a sharp shock on the upward stroke, as the jars come together, for loosening the bit should it tend to stick fast in the hole. A heavy bar is generally inserted between the jars and bit, for increasing the force of the blow. The weight of another bar above the jars keeps the rope taut. The length of stroke and feed are regulated by the "temper-screw" , a feed device resembling that used for rod-boring. Clamped to it is the drill rope, which is let out at intervals, as the hole is deepened. The bits usually range from 3 to 8 in. diameter, the speed of boring being generally between 20 and 40 ft. per 24 hours, according to the kind of rock. A great variety of special "fishing tools" are made, for use in case of breakage of parts in the hole or other accident.

Diamond drills of standard designs bore holes from 1-9/16 to 2 3/4 in. diameter, yielding cores of 1 to 1-15/16 in. diameter, and are capable of reaching depths of a few hundred to 4000 ft. or more. They require from 8 to 30 boiler horse-power. Large machines will bore shallower holes up to 6, 9 or even 12 in. diameter. For operating in underground workings of mines, small and compact machines are sometimes mounted on columns . They bore 1 1/4 to 1-9/16 in. holes to depths of 300 to 400 ft., cores being 7/8 to 1 in. diameter. Hand-power drills are also built. In the South African goldfields several diamond drill holes from 4500 to 5200 ft. deep have been successfully bored. Rates of advance for core-drilling to moderate depths range usually from 2 to 3 ft. per hour, including ordinary delays, though in favourable rock much higher speeds are often attained. In deep holes the speeds diminish, because of time consumed in raising and lowering the rods. If no core is desired a "solid bit" is used. The drilling then proceeds faster, as it is only necessary to raise the rods occasionally, for examining the condition of the bit.

The bit is of soft steel, set with six to eight or more diamonds according to its diameter. The diamonds, usually from 1 1/2 to 2 1/2 carats in size, are carefully set in the bit, projecting but slightly from its surface. Two kinds of diamonds are used, "carbons" and "borts." The carbons are opaque, dark in colour, tougher than the brilliant, and have no cleavage planes. They are therefore suitable for drilling in hard rock. Borts are rough, imperfect brilliants, and are best used for the softer rocks. As the bit wears, the stones must be reset from time to time. The wear of carbons in a well-set bit is small, though extremely variable. Above the bit are the core-lifter and core-barrel. The core-lifter is a device for gripping and breaking off the core and raising it to the surface. The barrel, 3 to 10 ft. long, fits closely in the hole and is often spirally grooved for the passage of the water and debris. It serves partly as a guide, tending to keep the hole straight, partly for holding and protecting the core.

Diamond drills do not work satisfactorily in broken, fissured rock, as the carbons are liable to be injured, loosened or torn from their settings. In these circumstances, and for soft rocks, the diamond bit may be replaced by a steel toothed bit. Another apparatus for core-drilling is the Davis Calyx drill. For hard rock it has an annular bit, accompanied by a quantity of chilled steel shot; for soft rock, a toothed bit is used.

FOOTNOTE:

BORISOGLYEBSK, a town of Russia, in the government of Tambov, 100 m. S.S.E. of the city of that name, in 51? 22' N. lat. and 43? 4' E. long. It was founded in 1646 to defend the southern frontiers of Muscovy against the Crimean Tatars, and in 1696 was surrounded by wooden fortifications. The principal industries are the preparation of wool, iron-casting, soap-boiling, tallow-melting, and brick-making; and there is an active trade in grain, wool, cattle, and leather, and two important annual fairs. Pop. 12,254; 22,370.

BORKU, or BORGU, a region of Central Africa between 17? and 19? N. and 18? and 21? E., forming part of the transitional zone between the arid wastes of the Sahara and the fertile lands of the central Sudan. It is bounded N. by the Tibesti Mountains, and is in great measure occupied by lesser elevations belonging to the same system. These hills to the south and east merge into the plains of Wadai and Darfur. South-west, in the direction of Lake Chad, is the Bodele basin. The drainage of the country is to the lake, but the numerous khors with which its surface is scored are mostly dry or contain water for brief periods only. A considerable part of the soil is light sand drifted about by the wind. The irrigated and fertile portions consist mainly of a number of valleys separated from each other by low and irregular limestone rocks. They furnish excellent dates. Barley is also cultivated. The northern valleys are inhabited by a settled population of Tibbu stock, known as the Daza, and by colonies of negroes; the others are mainly visited by nomadic Berber and Arab tribes. The inhabitants own large numbers of goats and asses.

BORKUM, an island of Germany, in the North Sea, belonging to the Prussian province of Hanover, the westernmost of the East Frisian chain, lying between the east and west arms of the estuary of the Ems, and opposite to the Dollart. Pop. about 2500. The island is 5 m. long and 2 1/2 m. broad, is a favourite summer resort, and is visited annually by about 20,000 persons. There is a daily steamboat service with Emden, Leer and Hamburg during the summer months. The island affords pasture for cattle, and a breeding-place for sea-birds.

BORMIO , a town of Lombardy, Italy, in the province of Sondrio, 41 1/2 m. N.E. of the town of Sondrio. Pop. 1814. It is situated in the Valtellina , 4020 ft. above sea-level, at the foot of the Stelvio pass, and, owing to its position, was of some military importance in the middle ages. It contains interesting churches and picturesque towers. A cemetery of pre-Roman date was discovered at Bormio in 1820.

The baths of Bormio, 2 m. farther up the valley, are mentioned by Pliny and Cassiodorus, the secretary of Theodoric, and are much frequented.

BORNA, a town of Germany in the kingdom of Saxony, on the Wyhra at its junction with the Pleisse, 17 m. S. by E. of Leipzig by rail. Pop. 9176. The industries include peat-cutting, iron foundries, organ, pianoforte, felt and shoe factories.

BORNEO, a great island of the Malay Archipelago, extending from 7? N. to 4? 20' S., and from 108? 53' to 119? 22' E. It is 830 m. long from N.E. to S.W., by 600 m. in maximum breadth. Its area according to the calculations of the Topographical Bureau of Batavia comprises 293,496 sq. m. These figures are admittedly approximate, and Meyer, who is generally accurate, gives the area of Borneo at 289,860 sq. m. It is roughly, however, five times as large as England and Wales. Politically Borneo is divided into four portions: British North Borneo, the territory exploited and administered by the Chartered British North Borneo Company, to which a separate section of this article is devoted; Brunei , a Malayan sultanate under British protection; Sarawak , the large territory ruled by raja Brooke, and under British protection in so far as its foreign relations are concerned; and Dutch Borneo, which comprises the remainder and by far the largest and most valuable portion of the island.

The dog, the cat, the pig, the domestic fowl , the buffalo, a smaller breed than that met with in the Malayan Peninsula, and in some districts bullocks of the Brahmin breed and small horses, are the principal domestic animals. The character of the country and the nomadic habits of many of the natives of the interior, who rarely occupy their villages for more than a few years in succession, have not proved favourable to pastoral modes of life. The buffaloes are used not only in agriculture, but also as beasts of burden, as draught-animals and for the saddle. Horses, introduced by Europeans and owned only by the wealthier classes, are found in Banjermasin and in Sarawak. In British North Borneo, and especially in the district of Tempasuk on the north-west coast, Borneo ponies, bred originally, it is supposed, from the stock which is indigenous to the Sulu archipelago, are common.

Dutch Borneo 1,130,000 British North Borneo 200,000 Sarawak 500,000 Brunei 20,000

No effective census of the population has ever been taken, and vast areas in Dutch Borneo and in British North Borneo remain unexplored, and free from any practical authority or control. In Sarawak, owing to the high administrative genius of the first raja and his successor, the natives have been brought far more completely under control, but the raja has never found occasion to utilize the machinery of his government for the accurate enumeration of his subjects.

Dutch Borneo is divided for administrative purposes into two divisions, the western and the south and eastern respectively. Of the two, the former is under the more complete and effective control. The estimated population in the western division is 413,000 and in the south and eastern 717,000. Europeans number barely 1000; Arabs about 3000, and Chinese, mainly in the western division, over 40,000. In both divisions there is an average density of little more than 1 to every 2 sq. m. The sparseness of the population throughout the Dutch territory is due to a variety of causes--to the physical character of the country, which for the most part restricts the area of population to the near neighbourhood of the rivers; to the low standard of civilization to which the majority of the natives have attained and the consequent disregard of sanitation and hygiene; to wars, piracy and head-hunting, the last of which has not even yet been effectually checked among some of the tribes of the interior; and to the aggression and oppressions in earlier times of Malayan, Arab and Bugis settlers. Among the natives, more especially of the interior, an innate restlessness which leads to a life of spasmodic nomadism, poverty, insufficient nourishment, an incredible improvidence which induces them to convert into intoxicating liquor a large portion of their annual crops, feasts of a semi-religious character which are invariably accompanied by prolonged drunken orgies, and certain superstitions which necessitate the frequent procuration of abortion, have contributed to check the growth of population. In Sambas, Montrado and some parts of Pontianak, the greater density of the population is due to the greater fertility of the soil, the opening of mines, the navigation and trade plied on the larger rivers, and the concentration of the population at the junctions of rivers, the mouths of rivers and the seats of government. Of the chief place in the western division, Pontianak has about 9000 inhabitants; Sambas about 8000; Montrado, Mampawa and Landak between 2000 and 4000 each; and in the south and eastern division there are Banjermasin with nearly 50,000 inhabitants; Marabahan, Amuntai, Negara, Samarinda and Tengarung with populations of from 5000 to 10,000 inhabitants each. In Amuntai and Martapura early Hindu colonization, of which the traces and the influence still are manifest, the fertile soil, trade and industry aided by navigable rivers, have co-operated towards the growth of population to a degree which presents a marked contrast to the conditions in the interior parts of the Upper Barito and of the more westerly rivers. Only a very small proportion of the Europeans in Dutch Borneo live by agriculture and industry, the great majority of them being officials. The Arabs and Chinese are engaged in trading, mining, fishing and agriculture. Of the natives fully 90% live by agriculture, which, however, is for the most part of a somewhat primitive description. The industries of the natives are confined to such crafts as spinning and weaving and dyeing, the manufacture of iron weapons and implements, boat- and shipbuilding, &c. More particularly in the south-eastern division, and especially in the districts of Negara, Banjermasin, Amuntai and Martapura, shipbuilding, iron forging, gold- and silversmith's work, and the polishing of diamonds, are industries of high development in the larger centres of population.

BRITISH NORTH BORNEO OR SABAH

Sabah is the name applied by the natives to certain portions of the territory situated on the north-western coast of the island, and originally in no way included the remainder of the country now owned by the British North Borneo Company. It has become customary, however, for the name to be used by Europeans in Borneo to denote the whole of the company's territory, and little by little the more educated natives are insensibly adopting the practice.

BORNU, a country in the Central Sudan, lying W. and S. of Lake Chad. It is bounded W. and S. by the Hausa states and N. by the Sahara. Formerly an independent Mahommedan sultanate it has been divided between Great Britain, Germany and France. To France has fallen a portion of northern Bornu and also Zinder , a tributary state to the north-west, while the south-west part is incorporated in the German colony of Cameroon. Three-fourths of Bornu proper, some 50,000 sq. m., forms part of the British protectorate of Nigeria.

Wild animals, in great numbers, find both food and cover in the extensive districts of wood and marsh. Lions, giraffes, elephants, hyenas, crocodiles, hippopotami, antelopes, gazelles and ostriches are found. The horse, the camel and the ox are the chief domestic animals; all are used as beasts of burden. The country abounds with bees, and honey forms one of the chief Bornuese delicacies.

The climate, especially from March to the end of June, is oppressively hot, rising sometimes to 105? and 107?, and even during most of the night not falling much below 100?. In May the wet season begins, with violent storms of thunder and lightning. In the end of June the rivers and lakes begin to overflow, and for several months the rains, accompanied with sultry weather, are almost incessant. The inhabitants at this season suffer greatly from fevers. In October the rains abate; cool, fresh winds blow from the west and north-west; and for several months the climate is healthy and agreeable.

The pastoral districts of the country are occupied by the Shuwas, who are of Arab origin, and speak a well-preserved dialect of Arabic. Of the date of their immigration from the East there is no record; but they were in the country as early as the middle of the 17th century. They are divided into numerous distinct clans. Their villages in general consist of rudely constructed huts, of an exaggerated conical form. Another tribe, called La Salas, inhabits a number of low fertile islands in Lake Chad, separated from the mainland by fordable channels.

The Bornuese are noted horsemen, and in times of war the horses, as well as the riders, used to be cased in light iron mail. The Shuwas, however, are clad only in a light shirt, and the Kanembu spearmen go almost naked, and fight with shield and spear. It is indispensable to a chief of rank that he should possess a huge belly, and when high feeding cannot produce this, padding gives the appearance of it. Notwithstanding the heat of the climate, the body is enveloped in successive robes, the number indicating the rank of the wearer. The head likewise is enclosed in numerous turbans. The prevailing language in Bornu is the Kanuri. It has no affinity, according to Heinrich Barth, with the great Berber family. A grammar was published in 1854 by S.W. Koelle, as well as a volume of tales and fables, with a translation and vocabulary.

The towns in Bornu, which have populations varying from 10,000 to 50,000 or more, are surrounded with walls 35 or 40 ft. in height and 20 ft. in thickness, having at each of the four corners a triple gate, composed of strong planks of wood, with bars of iron. The abodes of the principal inhabitants form an enclosed square, in which are separate houses for each of the wives; the chief's palace consists of turrets connected together by terraces. These are well built of a reddish clay, highly polished, so as to resemble stucco; the interior roof, though composed only of branches, is tastefully constructed. Maidugari, which in 1908 became the seat of the native government, is a thriving commercial town some 70 m. south-west of Lake Chad. The former capital, Kuka , and Ngornu , are near the shores of Lake Chad. On the Yo are still to be seen extensive remains of Old Bornu or Birni and Gambarou or Ghambaru, which were destroyed by the Fula about 1809. Dikwa, the capital chosen by Rabah , lies in the German part of Bornu.

During Omar's reign, which lasted about fifty years, Bornu was visited by many Europeans, who reached it via Tripoli and the Sahara. The first to enter the country were Walter Oudney, Hugh Clapperton and Dixon Denham . They were followed in 1851-1855 by Heinrich Barth. Later travellers included Gerhard Rohlfs and Gustav Nachtigal. All these travellers were well received by the Kanuri, whose power from the middle of the 19th century began to decay. This was foreseen by Barth; and Nachtigal, who in 1870 conveyed presents sent by King William of Prussia, in acknowledgment of the sheik's kindness to many German explorers, writes thus in December 1872:

"The rapid declension of Bornu is an undeniable and lamentable fact. It is taking place with increasing rapidity, and the boundless weakness of Sheik Omar--otherwise so worthy and brave a man--must bear almost all the blame. His sons and ministers plunder the provinces in an almost unheard-of manner; trade and intercourse are almost at a standstill; good faith and confidence exist no more. The indolence of the court avoids military expeditions, and anarchy and a lack of security on the routes are the consequences.... Thus the sheik and the land grow poorer and poorer, and public morality sinks lower and lower."

After the visit of Nachtigal the country was visited by no European traveller until 1892, when Colonel P.L. Monteil resided for a time at Kuka during his great journey from the Senegal to Tripoli. The French traveller noticed many signs of decadence, the energy of the people being sapped by luxury, while a virtual anarchy prevailed owing to rivalries and intrigues among members of the royal family. The chief of Zinder had ceased to pay tribute, and the sultan was not strong enough to exact it by force. At the same time a danger was threatening from the south-east, where the negro adventurer Rabah, once a slave of Zobeir Pasha, was menacing the kingdom of Bagirmi. After making himself master of the fortified town of Manifa, Rabah proceeded against Bornu, defeating the army of the sultan Ahsem in two pitched battles. In December 1893 Ahsem fled from Kuka, which was entered by Rabah and soon afterwards destroyed, the capital being transferred to Dikwa in the south-east of the kingdom. These events ruined for many years the trade between Tripoli and Kuka by the long-established route via Bilma. Rabah had raised a large, well-drilled army, and proved a formidable opponent to the French in their advance on Lake Chad from the south. However in 1900 he was killed at Kussuri near the lower Shari, by the combined forces of three French expeditions which had been converging from the Congo, the Sahara and the Niger.

BOROLANITE, one of the most remarkable rocks of the British Isles, found on the shores of Loch Borolan in Sutherlandshire, after which it has been named. In this locality there is a considerable area of granite rich in red alkali felspar, and passing, by diminution in the amount of its quartz, into quartz-syenites and syenites. At the margins of the outcrop patches of nepheline-syenite occur; usually the nepheline is decomposed, but occasionally it is well-preserved; the other ingredients of the rock are brown garnet and aegirine. The abundance of melanite is very unusual in igneous rocks, though some syenites, leucitophyres, and aegirine-felsites resemble borolanite in this respect. In places the nepheline-syenite assumes the form of a dark rock with large rounded white spots. These last consist of an intermixture of nepheline or sodalite and alkali-felspar. From the analogy of certain leucite-syenites which are known in Arkansas, it is very probable that these spots represent original leucites which have been changed into aggregates of the above-named minerals. They resemble leucite in their shape, but have not yet been proved to have its crystalline outlines. The "pseudo-leucites," as they have been called, measure one-quarter to three-quarters of an inch across. The dark matrix consists of biotite, aegirine-augite and melanite. Connected with the borolanite there are other types of nepheline-syenite and pegmatite. In Finland, melanite-bearing nepheline rocks have been found and described as Ijolite, but the only other locality for melanite-leucite-syenite is Magnet Cove in Arkansas.

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