On leaving England Boscovich travelled in Turkey, but ill-health compelled him soon to return to Italy. In 1764 he was called to the chair of mathematics at the university of Pavia, and this post he held, together with the directorship of the observatory of Brera, for six years. He was invited by the Royal Society of London to undertake an expedition to California to observe the transit of Venus in 1769; but this was prevented by the recent decree of the Spanish government for the expulsion of the Jesuits from its dominions. The vanity, egotism and petulance of Boscovich provoked his rivals and made him many enemies, so that in hope of peace he was driven to frequent change of residence. About 1770 he removed to Milan, where he continued to teach and to hold the directorship of the observatory of Brera; but being deprived of his post by the intrigues of his associates he was about to retire to his native place, when the news reached him (1773) of the suppression of his order in Italy. Uncertainty as to his future led him to accept an invitation from the king of France to Paris, where he was naturalized and was appointed director of optics for the marine, an office instituted for him, with a pension of 8000 livres. He remained there ten years, but his position became irksome, and at length intolerable. He continued, however, to devote himself diligently to the pursuits of science, and published many remarkable memoirs. Among them were an elegant solution of the problem to determine the orbit of a comet from three observations, and memoirs on the micrometer and achromatic telescopes. In 1783 he returned to Italy, and spent two years at Bassano, where he occupied himself with the publication of his Opera pertinentia ad opticam et astronomiam, &c., which appeared in 1785 in five volumes quarto. After a visit of some months to the convent of Vallombrosa, he went to Milan and resumed his literary labours. But his health was failing, his reputation was on the wane, his works did not sell, and he gradually sank a prey to illness and disappointment. He fell into melancholy, imbecility, and at last madness, with lucid intervals, and died at Milan on the 15th (13th) of February 1787. In addition to the works already mentioned Boscovich published Elementa universae matheseos (1754), the substance of the course of study prepared for his pupils; and a narrative of his travels, entitled Giornale di un viaggio da Constantinopoli in Polonia, of which several editions and a French translation appeared. His latest labour was the editing of the Latin poems of his friend Benedict Stay on the philosophy of Descartes, with scientific annotations and supplements.
(W. L. R. C.)
BOSNIA AND HERZEGOVINA, or Bosnia-Herzegovina, two provinces formerly included in European Turkey, which now, together with Dalmatia, form the southernmost territories of the Austro-Hungarian Monarchy. The name Herzegovina is also written Hertzegovina, Hertsegovina or, in Croatian, Hercegovina. In shape roughly resembling an equilateral triangle, with base uppermost, Bosnia and Herzegovina cover an area of 19,696 sq. m., in the north-west of the Balkan Peninsula. They are bounded N. and N.W. by Croatia-Slavonia; W. and S.W. by Dalmatia; S.E. by Montenegro and the Sanjak of Novibazar; and N.E. by Servia. Opposite to the promontory of Sabbioncello, and at the entrance to the Bocche di Cattaro, the frontier of Herzegovina comes down to the Adriatic; but these two strips of coast do not contain any good harbour, and extend only for a total distance of 14½ m. Bosnia is altogether an inland territory.
1. Physical Features.—Along the Dalmatian border, and through the centre of Bosnia, runs the backbone of the Dinaric Alps, which attain their greatest altitudes (6000-7500 ft.) near Travnik, Serajevo and Mostar. There are numerous high valleys shut in among the mountains of this range; the most noteworthy being the plain of Livno, which lies parallel to the Dalmatian border, at a height of 500 ft. above the sea. The zone of highlands throughout Bosnia and Herzegovina reaches a mean altitude of 1500 ft., while summits of more than 4000 ft. occur frequently. To the north-east of the Dinaric Alps extends a region of mountain, moor and forest, with deeply sunk alluvial basins, which finally expand into the lowlands of the Posavina, or Vale of the Save, forming the southernmost fringe of the Hungarian Alföld. Bosnia belongs wholly to the watershed of the Save, and its rivers to the Danubian system, no large stream finding a way to the Adriatic. The Save flows eastward along the northern frontier for 237 m. It is joined by four main tributaries, the Drina, Bosna, Vrbas and Una. The Drina is formed on the Montenegrin frontier by the united streams of the Tara and Piva; curving north-eastwards past Visegrad, it marches for 102 m. with Servian territory, and falls into the Save at Racha, after a total course of 155 m. The Bosna issues from many springs near Serajevo, and winds for 107 m. northward, through a succession of fertile glens, reaching the Save 1 m. west of Samac. Farther west, the Vrbas cuts a channel through the Dinaric Alps, and, after passing Jajce and Banjaluka, meets the Save 94 m. from its own headwaters. The Una rises on the Croatian border, and, after skirting the Plješevica Planina, in Croatia, turns sharply to the north-east; serving as a frontier stream for 37 m. before entering the Save at Jasenovac. Its length is 98 m. At Novi it is joined by the Sana, a considerable affluent.
Herzegovina, which lies south of Bosnia, in a parallelogram defined by Montenegro, Dalmatia, the Dinaric Alps, and an irregular line drawn from a point 25 m. west-north-west of Mostar to the bend of the river Narenta, differs in many respects from the larger territory. Its mountains, which belong to the Adriatic watershed, and form a continuation of the Montenegrin highlands, are less rounded and more dolomitic in character. They descend in parallel ridges of grey Karst limestone, south-westwards to the sea; their last summits reappear in the multitude of rocky islands along the Dalmatian littoral. As in the peaks of Orjen, Orobac, Samotica and Veliki Kap, their height often exceeds 6000 ft. West of the Narenta, their flanks are in places covered with forests of beech and pine, but north-east of that river they present for the most part a scene of barren desolation. Their monotony is varied only by the fruitful river-valleys and poljes, or upland hollows, where the smaller towns and villages are grouped; the districts or cantons thus formed are walled round by a natural rampart of limestone. These poljes may be described as oases in what is otherwise a desert expanse of mountains. The surface of some, as notably the Mostarsko Blato, lying west of Mostar, is marshy, and in spring forms a lake; others are watered by streams which disappear in swallow-holes of the rock, and make their way by underground channels either to the sea or the Narenta. The most conspicuous example of these is the Trebinjcica, which disappears in two swallow-holes in Popovopolye, and after making its way by a subterranean passage through a range of mountains, wells up in the mighty source of Ombla near Ragusa, and hurries in undiminished volume to the Adriatic. The Narenta, or Neretva, is the one large river of Herzegovina which flows above ground throughout its length. Rising on the Montenegrin border, under the Lebrsnik mountains, it flows north-westwards at the foot of the Dinaric Alps; and, near Konjica, sweeps round suddenly to the south, and falls into the Adriatic near Metkovic, after traversing 125 m. North of Mostar, it cleaves a passage through the celebrated Narenta defile, a narrow gorge, 12 m. long, overshadowed by mountains which rise on either side and culminate in Lupoglav (6796 ft.) on the east, and Cvrstnica (7205 ft.) on the west.
2. Geology and Minerals.—Geologically, the highlands of Bosnia and Herzegovina are to be regarded, in both their orographic and tectonic character, as a continuation of the South Alpine calcareous belt. Along the west frontier there appear broad and strongly marked zones of Cretaceous limestone, alternating with Jurassic and Triassic, joined by a strip of Palaeozoic formations running from the north-west corner of Bosnia. Next, proceeding from this region in an easterly direction, are the Neogene freshwater formations, filling up the greatest part of the north-east of Bosnia, as also a zone of flysch intermingled with several strips of eruptive rock. In the south-east of Bosnia the predominant formations are Triassic and Palaeozoic strata with red sandstone and quartzite. Along the whole northern rim of Bosnia, as also in the fluvial and Karst valleys (poljes), are found diluvial and alluvial formations, interrupted at one place by an isolated granite layer. Bosnia is rich in minerals, including coal, iron, copper, chrome, manganese, cinnabar, zinc and mercury, besides marble and much excellent building stone. Among the mountains, gold and silver were worked by the Romans, and, in the middle ages, by the Ragusans. After 1881 the Mining Company of Bosnia began to develop the coal and iron fields; and from 1886 its operations were continued by the government. Valuable salt is obtained from the pits at Dolnja Tuzla, and the southern part of Herzegovina yields asphalt and lignite. Mineral springs also abound, and those of Ilidže, near Serajevo, have been utilized since the days of the Romans; but the majority remained unexploited at the beginning of the 20th century.
3. Climate.—In climate Bosnia differs considerably from Herzegovina. In both alike the scirocco, bringing rain from the south-west, is a prevalent wind, as well as the bora, the fearful north-north-easter of Illyria, which, sweeping down the lateral valleys of the Dinaric Alps, overwhelms everything in its path. The snow-fall is slight, and, except on a few of the loftier peaks, the snow soon melts. In Bosnia the weather resembles that of the south Austrian highlands, generally mild, though apt to be bitterly cold in winter. In Serajevo the mean annual temperature is 50° Fahr. Herzegovina has more affinity to the Dalmatian mountains, oppressively hot in summer, when the mercury often rises beyond 110° Fahr. The winter rains of the Karst region show that it belongs to the sub-tropical climatic zone.
4. Fauna.—In 1893 the bones of a cave-bear (Ursus spelaeus) were taken from a cavern of the Bjelasnica range, in Herzegovina, a discovery without parallel in the Balkan Peninsula. Of existing species the bear, wild-boar, badger, roe-deer and chamois may occasionally be seen in the remotest wilds of mountain and forest. Hares are uncommon, and the last red-deer was shot in 1814; but wolves, otters and squirrels abound. Snipe, woodcock, ducks and rails, in vast flocks, haunt the banks of the Drina and Save; while the crane, pelican, wild-swan and wild-goose are fairly plentiful. The lammergeier (Gypaëtus barbatus) had almost become extinct in 1900; but several varieties of eagle and falcon are left. Falconry was long a pastime of the Moslem landlords. The destruction of game, recklessly carried out under Turkish rule, is prevented by the laws of 1880, 1883 and 1893, which enforced a close time, and rendered shooting-licences necessary. The list of reptiles includes the venomous Vipera ammodytes and Pelias berus, while scorpions and lizards infest the stony wastes of the Karst. In the museum at Serajevo there is a large entomological collection, including the remarkable Pogonus anophthalmus, from the underground Karst caves. The caves are rich in curious kinds of fish, Paraphoxinus Gethaldii, which is unknown elsewhere, Chondrostoma phoximus, Phoxinellus alepidatus and others, which are caught and eaten by the peasantry. In Herzegovina, although many of the high mountain tarns are unproductive, the eel-fisheries of the Narenta are of considerable value. Leech-gathering is a characteristic Bosnian industry. The streams of both territories yield excellent trout and crayfish; salmon, sturgeon and sterlet, from the Danube, are netted in the Save.
5. Flora.—Serajevo museum has a collection of the Bosnian flora, representing over 3000 species; among them, the rare Veronica crinita, Pinus leucodermis, Picea omorica and Daphne Blagayana. About 50% of the occupied Forests. territory is clothed with forest. “Bosnia begins with the forest,” says a native proverb, “Herzegovina with the rock”; and this account is, broadly speaking, accurate, although the Bosnian Karst is as bare as that of Herzegovina. Below the mountain crests, where only the hardiest lichens and mosses can survive, comes a belt of large timber, including many giant trees, 200 ft. high, and 20 ft. in girth at the level of a man’s shoulder. Dense brushwood prevails on the foothills. There are three main zones of woodland. Up to 2500 ft. among the ranges of northern Bosnia, the sunnier slopes are overgrown by oaks, the shadier by beeches. Farther south, in central Bosnia, the oak rarely mounts beyond the foothills, being superseded by the beech, elm, ash, fir and pine, up to 5000 ft. The third zone is characterized by the predominance, up to 6000 ft., of the fir, pine and other conifers. In all three zones occur the chestnut, aspen, willow (especially Salix laurea), hornbeam, birch, alder, juniper and yew; while the mountain ash, hazel, wild plum, wild pear and other wild fruit trees are found at rarer intervals. Until 1878 the forests were almost neglected; afterwards, the government was forced to levy a graduated tax on goats, owing to the damage they inflicted upon young trees, and to curtail the popular rights of cutting timber and fir-wood and of pasturage. These measures were largely successful, but in 1902 the export of oak staves was discontinued owing to a shortage of supply.