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 has been kept for some time. It is used in medicine as an external application in some parasitic skin diseases, and internally as an expectorant. An analogous substance is derived from Liquidambar Altingia in Java. Liquidambar balsam is derived from Liquidambar styraciflua, a tree found in the United States and Mexico. It contains cinnamic acid, but not benzoic acid.

Of so-called balsams, entirely destitute of cinnamic and benzoic constituents, the following are found in commerce:—Mecca balsam or Balm of Gilead, from Commiphora opobalsamum, a tree growing in Arabia and Abyssinia, is supposed to be the balm of Scripture and the  of Theophrastus. When fresh it is a viscid fluid, with a penetrating odour, but it solidifies with age. It was regarded with the utmost esteem among the nations of antiquity and to the present day it is peculiarly prized among the people of the East. For balsam of copaiba see. Under the name of wood oil, or Gurjun balsam, an oleo-resin is procured in India and the Eastern Archipelago from several species of Dipterocarpus, chiefly D. turbinatus, which has the odour and properties of copaiba and has been used for the same purposes. Wood oil is also used as a varnish in India and forms an effective protection against the attacks of white ants. Canada balsam or Canada turpentine is the oleo-resin yielded by Abies balsamea, a tree that grows in Canada and the northern parts of the United States. It is a very transparent substance, somewhat fluid when first run, but thickening considerably with age, possessed of a delicate yellow colour and a mild terebinthous odour. It contains 24% of essential oil, 60% of resin soluble in alcohol, and 16% of resin soluble only in ether. Its chief uses are for mounting preparations for the microscope and as a cement for glass in optical work.

The garden balsam is an annual plant, Impatiens balsamina, and the balsam apple is the fruit of Momordica balsamina, nat. order Cucurbitaceae. BALSHAM, HUGH DE (d. 1286), English churchman, appears first as sub-prior of the monastery of Ely. On the death of William of Kilkenny in 1256 the monks elected him bishop of Ely, to the annoyance of Henry III. who had handed over the temporalities of the see to John de Waleran. The election was confirmed by the pope in 1257 and Hugh set to work to repair the harm done to the diocese by the intruder. In 1280 the bishop obtained a charter allowing him to replace the secular brethren residing in his hospital of St John at Cambridge by “studious scholars”; a second charter four years later entirely differentiated these scholars from the brethren of the hospital, and for them Hugh de Balsham founded and endowed the college of Peterhouse. BALTA, a town in the Russian government of Podolia, between the Dniester and the Bug, 131 m. by rail N.N.W. of Odessa. It carries on a large trade in cattle, horses and grain, and has two annual fairs, held at Whitsuntide and in June. A variety of industries, such as tallow-melting, soap-boiling, tile-making and brewing, are carried on. The Jews form a very considerable part of the population, which in 1867 numbered 14,528, and in 1897, 23,393. Balta was in great part destroyed by the Russians in 1780. BALTARD, LOUIS PIERRE (1764–1846), French architect and engraver, was born in Paris on the 9th of July 1764. He was originally a landscape painter, but in his travels through Italy was so much struck with the beauty of the Italian buildings, that he changed his profession and devoted himself to architecture. In his new occupation he achieved great success, and was selected to prepare the plans for some of the largest public edifices in Paris. His reputation, however, is chiefly based on his great skill in engraving. Among the best known of his plates are the drawings of Paris (Paris et ses monuments, 2 vols. fol., 1803), the engravings for Denon's Égypte, the illustrations of Napoleon's wars (La Colonne de la grande armée), and those contained in the series entitled the Grand prix de l’architecture, which for some time he carried on alone. He also gained distinction as an engraver of portraits. Baltard died in Paris on the 22nd of January 1846.

Two of his children were also architects. Of these the more important was (1805–1874), who was born in Paris on the 19th of June 1805. In 1803 he gained the prix de Rome at the École des beaux-arts for designing a military school. He was largely instrumental in introducing a regular scheme of fresco decoration by modern artists in the churches of Paris, to take the place of the heterogeneous collections of pictures of all kinds with which their walls had been promiscuously decorated. He built many additions to existing churches, and also the church of St Augustin, in which he united the structural values of stone and steel. His most popular achievement was, however, the building of the central market in Paris. Victor Baltard also built the slaughter houses and the cattle market of La Villette. He died in Paris on the 13th of January 1874, after a life of great activity in his profession.  BALTIC SEA (Scand. and Ger. Ostsee; Russ. Baltiyskoe More), a sea extending between 54° and 66° N. lat., and 9° and 30° E. long., surrounded by the territories of Sweden, Russia, Germany and Denmark. Its greatest length is about 960 m.; greatest breadth about 400 m.; and length of coast-line, 5000 m.; the central axis runs approximately from south-west to north-east. The Baltic is connected with North Sea by the winding channel between the south of Scandinavia and the Cimbrian peninsula. This channel is usually included in the Baltic. The part of it west of a line joining the Skaw with Christiania fjord receives the name of Skagerrak; the part east of this line is called the Kattegat. At its southern end the Kattegat is blocked by the Danish islands, and it communicates with the Baltic proper by narrow channels called the Sound, the Great Belt and the Little Belt. The real physical boundary between the North Sea and the Baltic is formed by the plateau on which the islands Zealand, Fünen and Laaland are situated, and its prolongation from the islands Falster and Möen to the coasts of Mecklenburg and Rügen.

East of this plateau the Baltic proper forms a series of hollows or troughs. The first, or Bornholm deep, lies east of the island of Bornholm, and is separated from the next, or Gotland deep, by the Middelbank. Beyond the Middelbank the Danziger Tiefe, an isolated depression, lies to the south-east, while to the north-east the Gotland basin, the largest and deepest of all, extends north-eastwards to the Gulf of Finland. Along the Swedish coast a deep channel runs northward from outside the island of Öland; this is entirely cut off to the south and east by a bank which sweeps eastward and northward from near Karlskrona, and on which the island of Gotland stands, but it communicates at its northern end with the Gotland deep, and near the junction opposite Landsort is the deepest hole in the Baltic (420 metres＝230 fathoms).

An unbroken ridge, extending from Stockholm to Hangö in Finland, separates the Baltic basin proper from the depression between Sweden and the Åland Isles, to which the name Åland Haf has been given. North of the Åland Haf a ridge defines the southern edge of another depression, the Bothnian Sea, which in turn is separated from the most northerly division, the Gulf of Bothnia, by a ridge across the narrow Quarken or Kvarken Strait. The Gotland deep may be said to extend directly into the Gulf of Finland, an arm of the Baltic, running eastwards for about 250 m., and separating Finland from Esthonia. Between Esthonia and Courland is the Gulf of Riga, a shallow inlet of roughly circular form, about 100 m. in diameter, and nowhere more than 27 fathoms deep.

According to recent computations the total area of the Baltic, including the Skagerrak and Kattegat, is 166,397 sq. m., and its volume 6907 cub. m., giving a mean depth of 36 fathoms, which is markedly less than that of any other arm of the sea of similar area.

In the deeper hollows in the south part of the Baltic the bottom consists almost invariably of either soft brown or grey mud or hard clay, while on the shallow banks and near the low coasts fine sand, of white, yellow or brown colour with small pebbles, is usually found.