ROT 



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BUT 



BO'TTEN STONE. Another name for 

 Tripoli. See Tripoli. 



BU'BELITE. j The Tourmaline rubel- 



BU'BELLITE. j lite of Brongniart; 

 Tourmaline apyre of Haiiy. Bed 

 tourmaline. A mineral of a red 

 colour, of various shades; in the 

 form of its crystals it resembles 

 schorl, as well as in its power of 

 acquiring opposite electricities by 

 heat. It is translucent, semetimes 

 transparent. Specific gravity 307. 

 Its crystals are cylindrical or acicu- 

 lar, and aggregated in groups. 

 Before the blowpipe it becomes 

 white, but does not fuse. Its con- 

 stituents are silex 42-0, alumine 

 40 0, soda 10-0, oxides of manga- 

 nese and iron 7*0. In the British 

 Museum there is a specimen of 

 Bubellite, from the kingdom of 

 Ava, valued at 1000. Some 

 mineralogists deem rubellite to be 

 merely a variety of tourmaline, it 

 was however arranged as a distinct 

 subspecies by Karsten and Steffens. 

 Bubellite has also obtained the 

 names of Daourite and Siberite. 



BTJ'BBLE. A term applied to loose 

 angular gravel, or a slightly com- 

 pacted brecciated sandstone. 



BU'BY, (from rubeo, Lat. to be red, 

 rulis, iY. rulino, It. rulm, Germ.) 

 The Spinell of Werner; Spinelle 

 rubis of Brongniart. A transparent 

 red variety of rhombohedral corun- 

 dum. The ruby is a variety of the 

 same mineral genus as the sapphire,, 

 but differs from it in containing 

 rather more silex, and in being less 

 hard. Bubies are found in alluvial 

 soil in Ceylon, Pegu, and other 

 conntries in the East. The ruby 

 ranks next to the diamond in value. 

 When a specimen is fine, and free 

 from flaws, a ruby of large size 

 will sell for from ten to fifteen 

 thousand pounds. 



BUD'ISTES. A family of the order 

 Conchifera M'onomy aria of Lamarck, 

 containing the genera Crania, Pis- 



cina, Birostrites, Badiolites, Sphce- 



rulites and Calceola. Lycett. 

 BUGO'SA. The name of an extinct 



order of four- starred corals, of the 



class Actinozoa. 

 BTJGO'SE. ) 

 Ito-wim. j 



1. In concholegy, applied to shells 

 which are rugged and full of 

 wrinkles. 



2. In botany, applied to leaves 

 when the veins are more contracted 

 than the disc, so that the disc rises 

 into little inequalities; the prim- 

 rose and sage afford examples. 



3. In entomology, when longitu- 

 dudinal elevations are placed irre- 

 gularly on the surface, resembling 

 coarse wrinkles. 



BTTMINA'NTIA. j The eighth order of 



BU'MINANTS. j Mammalia, or those 

 animals that chew the cud. These 

 animals possess the singular pro- 

 perty of returning the food to the 

 mouth after it has been swallowed, 

 that it may undergo the process 

 of a second mastication. This 

 property depends upon the struc- 

 ture of the four stomachs which 

 these animals possess, the three 

 first being so arranged that the 

 food may pass from the oesophagus 

 into either of them. Cuvier divides 

 this great order into those that have 

 horns, and those that have none. 

 " Fossil ruminantia," says Pid- 

 geon, " are found in the depo- 

 sitions of many different eras. The 

 ruminants were clearly coeval with 

 the other mammifera of the ancient 

 world ; and they existed in a nu- 

 merical proportion sufficiently great 

 to produce an abundance of their 

 bones in various depositions." 



BT/FCINATE. (from runcina, a saw, 

 Lat.) In botany, a term applied 

 to leaves whose edges are cut into 

 teeth turning backwards, like a 

 scythe. 



BUTHE'NEUM. One of the noble 

 metals, its symbols being Bu. 

 Specific gravity 8 f 60. 



