218 LTEBTGITE. 



LiEBiGiTE, J. L. Smith, Dufrenoy. In 

 mammillary concretions or thin crusts, 

 having a distinct cleavage in one direction. 

 Colour beautiful apple-green. Transparent. 

 Lustre and fracture vitreous. H. 2 to i-b. 



Comp. Carbonate of Uranium and Lime. 



# C + Ca C + 20H-- oxide of uranium 36-3, 

 carbonic acid 11-1, lime 7-1, water 45-5 = 100. 

 Analysis, by J. L. Smith : 

 Peroxide of m-anium . . 38'0 



Lime 8*0 



Carbonic acid . . . 10-2 

 Water 45-2 



101-4 



BB gently heated becomes greenish - 

 grey. At a red heat, does not fuse but 

 turns black, and acquires an orange-red 

 colour on cooling. With borax forms a 

 yellowish glass in the outer, and a green 

 glass in the inner flame. 



Dissolves readily in dilute muriatic acid, 

 with violent effervescence, forming a yellow 

 solution. 



Locality. The neighbourhood of Adriano- 

 ple in Turkey, with Medjidite, on Pitch- 

 blende. Johanngeorgenstadt, in Saxony, 

 and Joachimstahl in Bohemia. 



Name. After the Baron Liebig, Professor 

 of Chemistry in the University of Giessen. 



llege de montagne. scb mountain 

 Cork. 



LlEVRiTE, Werner. Rhombic : primary 

 form a right rhombic prism, in which it 

 occurs with the lateral faces striated longi- 

 tudinally. Also compact, massive, and radi- 

 ated. Cleavage indistinct, parallel to a 

 plane passing thi-ough its longer diagonal. 

 Colour brown or dark greyish-black. Lustre 

 submetallic. Opaque. Streak black, in- 

 clining to green or brown. Brittle. Frac- 

 ture uneven. H. 5-5 to 6. S.G. 3-8 to 4-2. 



r^ 



Fig. 264. 



Fig. 265. 



Fig. 266. 



Comp. 3(Fe,Ca)5 bi + Fe2 bi = silica 28-2, 

 peroxide of iron 25-0, protoxide of iron 

 33-7, lime 13-1-100. 



Atialysis, from Elba, by Rammelsherg : 



Silica 27-83 



Peroxide of iron , . . 24-58 

 Protoxide of iron . . .30-73 



LIGNITE. 



Lime 12-44 



Protoxide of manganese . 1-51 



97-11 



BB on charcoal fuses to a black globule, 

 which attracts the magnet if it has not been 

 heated to redness. With borax fuses readily 

 to a dark green and almost opaque glass. 



Soluble in muriatic acid, forming a jelly. 



Localities. Cape Calamita and la Marina 

 de Rio, Elba; in crystals and radiated 

 masses in a dyke of Hornblende. Possum 

 and Skeen in Norway. Siberia. Near An- 

 dreasberg in the Harz, Schneeberg in 

 Saxony. Near Predazzo in the Tyrol, in 

 granite. Cumberland, Rhode Island, in the 

 United States, in slender crystals traversing 

 Quartz. 



Name. After its discoverer, Le Lievre, 

 mineralogist and engineer. 



Brit. Mus., Case 34. 



3I.F.G. Principal Floor, Wall-case 19. 



Light Pyrargyrite, or Light Red 

 Silver Ore. See Proustite, and Pyrar- 

 gyrite. 



Ligniform Asbestos, Kirwan. See 

 MorjNTAiN Wood. 



Lignite, (from lignum, wood.) Brown 

 Coal, in which the form and woody structure 

 of the original tree is preserved. 



According to the recently published re- 

 searches of Mons. M. E. Fremy, Lignite may 

 be divided into two classes; 1st. Lig- 

 nite xylo'ide etjibreux, or bois fossile, Lignite 

 still displaying woody structure ; and 2nd. 

 Lignite compacte et parfait, or Lignite exhi- 

 biting the aspect and compactness of Coal. 



The compact Lignites with the black and 

 shining appearance of Coal are entirely 

 soluble in alkaline hypochlorites, and are 

 attacked by nitric acid with the greatest 

 rapidity, producing a j^ellow resin. Lignite 

 xylo'ide and compact Lignite generally 

 differ in the more combustible variety not 

 being acted on by concentrated potash ; and 

 M. Fremy has invariably observed that 

 those Lignites which resist the action of 

 potash are those which are derived from 

 beds whose stratigraphical position most 

 nearly approaches the true Coal Measures. 



Lignites may, therefore, be distinguished, 

 on the one hand, from mere wood by their 

 complete solubility in nitric acid and in 

 hypochlorites, and by the above-mentioned 

 characters from Coals, which last are inso- 

 luble in hypochlorites, and are only slowly 

 attacked b}'^ nitric acid. 



The following are, according to M. Fre- 

 my, the degrees of alteration of woody 

 tissue : — 



