HlKEfcALOGY OF CIIALANCHES. \Q() 



Of the second class, earthy substances not acidiferous, 2d diss, 

 quartz is tolerably abundant. It has beeu remarked, that Quartz, 

 its presence is a bad omen with regard to the richness of the 

 silver ore* Its most usual combinations are with cobalt and 

 antimony. The hyaline quartz is pretty frequent in the Rock crystal* 

 veins, but rarely in well defined crystals: it is combined 

 with a great variety of earthy substances, but its combina- 

 tion with metals are still more numerous. Its compounds 

 contain from two to five substances, and even more. 



Jasper is not common, but is sometimes met with in the Jasper, 

 metallic veins, or those of quartz. Its varieties are brown, 

 reddish, yellowish, and blackish. 



Garnets are very common in the rocks of white micaceous Garnets* 

 feldspar, but they are very small, being at most 2 millim. 

 [0*78 of a line] in diameter. Those that are found in the 

 gneiss are larger, but less distinctly formed. They have not 

 many varieties either of figure or colour. 



The veins produce some handsome varieties of feldspar, Feldspar. 

 which is tolerably abundant in some parts of the mountain, 

 and frequently in well defined crystals* 



Tourmalines are found in a rock of white micaceous feld- Tourmalines, 

 spar, in tracing a Vein of sulphuret of lead at Lafare. They 

 are in very distinct crystals several centimetres long, and 

 about 1 cent. [3*9 lines] in diameter. They frequently oc- 

 cur of a cylindroid figure in the heart of the solid rock. 



A few small veins of axinite associated with epidote are Violet schoerl. 

 found in a hornblende rock at the foot of the mountain near 

 the cascade of Batou* 



Epidote is very abundant in the veins, sometimes well Green schoerl, 

 crystallized, and of a fine deep green, but very brittle. or P JsUcite * 

 More frequently it is in mass, and sometimes constitutes 

 whole rocks. Most commonly however it lines the sides of 

 clefts in hornblende quartz rocks. 



Amphibole and actinote, which the analyses of Mr. Lau- Hornblende 8c 

 gier have united into one species, are abundant, and form stranlilcin - 

 masses of considerable bulk. At the bottom of the moun- 

 tain, under the vein of Lafare, where a considerable por- 

 tion of cliff fell down some years ago, there is a rock of 

 white or gray feldspar, containing some beautiful needles 

 of amphibole of a blackish green. This rock exhibits one 



Vol. XXII— -Feb. 180°. K of 



