182 iScif.n'ific Iiitdhjcuce — Miiieraloji/ a)til Chcinlatri/. 



position is constant ; and its title to be regarded as a new mineral 

 species is, accoiding to IVl. Uufrenoy, undoubted, for it is founded 

 both on composition and crystallogr'apliic characters. It occurs in a 

 dendritic foi-m, or in small octahedral crystals; it is of a silver-white 

 colour like the amalgam of Moschel-Landsberg, but differs from it 

 in being malleable. It can be extended by the hammer, and cut by 

 the knife. The proportions of its constituent parts are 86.5 silver, 

 and 13.5 mercury ; while those of the iMoschel-Landsberg species ai'c 

 36 silver and 64 mercury. The name of Anjuerite is proposed for 

 the new mineral. 



12. Bromide of Silver in Mexico. — Berthicr has discovered the bro- 

 mide of silver in a perfectly pure condition in the mineral kingdom. 

 In the distiict of Plateros in Mexico, there is a silver mine where 

 the chief ore is chloride of silver. This substance is there termed 

 Plata azul (blue silver), and, along with it, grains and small crystals 

 occur, which receive the name of I'lata verde (green silver) ; the 

 latter, which are green only externally, are internally of a beautiful 

 yellow colour, and, acordiiK^ to Bertiiier's analysis, are pure bromide 

 of silver. The mine from which the analysed ore was extracted 

 bcar.s the name of .San Onofre. It is mixed \uth chloride of silver, 

 carbonate of lead, oxide oi'irun, and a little quartz containing alumina. 

 Its powder is yellow, bat exposure to the light soon produces the su- 

 perficial green tint. Bcrthier has subsequently found traces of 

 bromide of silver in a silver ore containing chloride of silver from 

 Huelgoat in ¥iauce.— (BcrzrUiis'' Jahres-Berirht, 1842.) 

 i 13. Broniidr of Silver in Chili. — M. Berthier, who has verified a part 

 of the analyses of M. Domeyko, has recognised in the argentiferous 

 minerals from Clianavcillo, designated Paco.i and Collorados, the 

 bromide of silver, which he had previously discovered in the ores of 

 Peru. The proportion of the bromide is very variable, but it is at 

 least equal to that of the chloride, so that this new species holds 

 an important position in the mineial ii( lies of Chili and of Peru. 



14. Bamlitr. — Erdniann has described under this name a new mine- 

 ral from Bamle in Norway. It forms a fibi'ous, white or gray, trans- 

 lucent mass, haviu'r an uneven and splintery fracture ; a specific 

 gravity = 2.984^ and a hardness a little above 6. It consists of 



Silica, .... 59.90 Oxygon .... 29 oC 3 



Aluminn, , . . 40.73 .... 19.34 2 



Oxide of Iron. . 1.04 

 Lime, .... 1.04 



Fluorine, ... A trace. 



91».71 



—ntrzdiu^' J'du-r,^ rrri'-iit. 1812. 



