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542
BAUXITE

in the following year was burned by its commander before being surrendered to the elector of Saxony. At the peace of Prague in 1635 it passed with Lusatia to Saxony as a war indemnity.

The town gives its name to a great battle in which, on the 20th and 21st of May 1813, Napoleon I. defeated an allied army of Russians and Prussians (see Napoleonic Campaigns). The position chosen by the allies as that in which to Battle of Bautzen, 1813. receive the attack of Napoleon ran S.W. to N.E. from Bautzen on the left to the village of Gleina on the right. Bautzen itself was held as an advanced post of the left wing (Russians), the main body of which lay 2 m. to the rear (E.) near Jenkwitz. On the heights of Burk, 2½ m. N.E. of Bautzen, was Kleist’s Prussian corps, with Yorck’s in support. On Kleist’s right at Pliskowitz (3 m. N.E. of Burk) lay Blücher’s corps, and on Blücher’s right, formed at an angle to him, and refused towards Gleina (7 m. N.E. by E. of Bautzen), were the Russians of Barclay de Tolly. The country on which the battle was fought abounded in strong defensive positions, some of which were famous as battlegrounds of the Seven Years’ War. The whole line was covered by the river Spree, which served as an immediate defence for the left and centre, and an obstacle to any force moving to attack the right; moreover the interval between the river and the position on this side was covered with a network of ponds and watercourses. Napoleon’s right and centre approached (on a broad front owing to the want of cavalry) from Dresden by Bischofswerda and Kamenz; the left under Ney, which was separated by nearly 40 m. from the left of the main body at Luckau, was ordered to march via Hoyerswerda, Weissig and Klix to strike the allies’ right. At noon on the 20th, Napoleon, after a prolonged reconnaissance, advanced the main army against Bautzen and Burk, leaving the enemy’s right to be dealt with by Ney on the morrow. He equally neglected the extreme left of the allies in the mountains, judging it impossible to move his artillery and cavalry in the broken ground there. Oudinot’s (XII.) corps, the extreme right wing, was to work round by the hilly country to Jenkwitz in rear of Bautzen, Macdonald’s (XI.) corps was to assault Bautzen, and Marmont, with the VI. corps, to cross the Spree and attack the Prussians posted about Burk. These three corps were directed by Soult. Farther to the left, Bertrand’s (IV.) corps was held back to connect with Ney, who had then reached Weissig with the head of his column. The Guard and other general reserves were in rear of Macdonald and Marmont. Bautzen was taken without difficulty; Oudinot and Marmont easily passed the Spree on either side, and were formed up on the other bank of the river by about 4 P.M. A heavy and indecisive combat took place in the evening between Oudinot and the Russian left, directed by the tsar in person, in which Oudinot’s men made a little progress towards Jenkwitz. Marmont’s battle was more serious. The Prussians were not experienced troops, but were full of ardour and hatred of the French. Kleist made a most stubborn resistance on the Burk ridge, and Bertrand’s corps was called up by Napoleon to join in the battle; but part of Blücher’s corps fiercely engaged Bertrand, and Burk was not taken till 7 P.M. The French attack was much impeded by the ground and by want of room to deploy between the river and the enemy. But Napoleon’s object in thus forcing the fighting in the centre was achieved. The allies, feeling there the weight of the French attack, gradually drew upon the reserves of their left and right to sustain the shock. At nightfall Bautzen and Burk were in possession of the French, and the allied line now stretched from Jenkwitz northward to Pliskowitz, Blücher and Barclay maintaining their original positions at Pliskowitz and Gleina. The night of the 20th-21st was spent by both armies on the battlefield. Napoleon cared little that the French centre was almost fought out; it had fulfilled its mission, and on the 21st the decisive point was to be Barclay’s position. Soon after daybreak fighting was renewed along the whole line; but Napoleon lay down to sleep until the time appointed for Ney’s attack. To a heavy counter-stroke against Oudinot, which completely drove that marshal from the ground won on the 20th, the emperor paid no more heed than to order Macdonald to support the XII corps. For in this second position of the allies, which was far more formidable than the original line, the decisive result could be brought about only by Ney. That commander had his own (III) corps, the corps of Victor and of Lauriston and the Saxons under Reynier, a total force of 60,000 men. Lauriston, at the head of the column, had been sharply engaged on the 19th, but had spent the 20th in calculated inaction. Early on the 21st the flank attack opened; Ney and Lauriston moving direct upon Gleina, while Reynier and Victor operated by a wide turning movement against Barclay’s right rear. The advance was carried out with precision; the Russians were quickly dislodged, and Ney was now closing upon the rear of Blücher’s corps at the village of Preititz. Napoleon at once ordered Soult’s four corps to renew their attacks in order to prevent the allies from reinforcing their right. But at the critical moment Ney halted; his orders were to be in Preititz at 11 A.M. and he reached that place an hour earlier. The respite of an hour enabled the allies to organize a fierce counter-attack; Ney was checked until the flanking columns of Victor and Reynier could come upon the scene. At 1 P.M., when Ney resumed his advance, it was too late to cut off the retreat of the allies. Napoleon now made his final stroke. The Imperial Guard and all other troops in the centre, 80,000 strong and covered by a great mass of artillery, moved forward to the attack; and shortly the allied centre, depleted of its reserves, which had been sent to oppose Ney, was broken through and driven off the field. Blücher, now almost surrounded, called back the troops opposing Ney to make head against Soult, and Ney’s four corps then carried all before them. Preparations had been made by the allies, ever since Ney’s appearance, to break off the engagement, and now the tsar ordered a general retreat eastwards, himself with the utmost skill and bravery directing the rearguard. Thus the allies drew off unharmed, leaving no trophies in the hands of Napoleon, whose success, tactically unquestionable, was, for a variety of reasons, and above all owing to the want of cavalry, a coup manqué strategically. The troops engaged were, on the French side 163,000 men, on that of the allies about 100,000; and the losses respectively about 20,000 and 13,500 killed and wounded.


BAUXITE, a substance which has been considered to be a mineral species, having the composition Al2O(OH)4 (corresponding with alumina 73.9, water 26.1%), and thus to be distinct from the crystallized aluminium hydroxides, diaspore (AlO(OH)) and gibbsite (= hydrargillite, Al(OH)3). It was first described by P. Berthier in 1821 as “alumine hydratée de Beaux,” and was named beauxite by P. A. Dufrénoy in 1847 and bauxite by E. H. Sainte-Claire Deville in 1861; this name being derived from the original locality, the village of Les Baux (or Beaux), near Arles, dep. Bouches-du-Rhône in the south of France, where the material has been for many years extensively mined as an ore of aluminium. It is never found in a crystallized state, but always as earthy, clay-like or concretionary masses, often with a pisolitic structure. In colour it varies from white through yellow and brown to red, depending on the amount and the degree of hydration of the iron present. The specific gravity also varies with the amount of iron; that of the variety known as wocheinite (from near Lake Wochein, near Radmannsdorf, in northern Carniola) is given as 2.55. The numerous chemical analyses, which have mostly been made for technical purposes, show that material known as bauxite varies very widely in composition, the maximum and minimum percentages of each constituent being as follows: alumina (Al2O3) 33.2-76.9; water (H2O) 8.6-31.4; iron oxide (Fe2O3) 0.1-48.8; silica (SiO2) 0.3-37.8; titanic acid (TiO2) up to 4. The material is thus usually very impure, being mixed with clay, quartz-sand and hydroxides of iron in variable amounts, the presence of which may be seen by a microscopical examination. Analyses of purer material often approximate to diaspore or gibbsite in composition, and minute crystalline scales of these minerals have been detected under the microscope.

Bauxite can therefore scarcely be regarded as a simple mineral, but rather as a mixture of gibbsite and diaspore with various impurities; it is in fact strikingly like laterite, both in chemical composition and in microscopical structure. Laterite is admittedly a decomposition-product of igneous or other crystalline