Lead Mines, &c. of Hampshire County, Mass. 261 
seen crystals several inches long, and one or two in diameter. 
Often it is radiate 
Galena. This mineral is found in most of the metallic 
veins of this region. It is often met with in quartz scattered 
upon the ground, in the vicinity of metallic veins. 
Pyritous Copper. 'This mineral is generally associated 
with galena. 
aga e. This is another mineral found also in metallic 
ve 
Earthy =e of lead. (? Ed.) In cavities in quartz, near a 
galena ve in. W iM amsbanah It is friable, and often has car- 
bonate of ae along with it 
Green se ccige of copper, in Williamsburgh, in cavities 
in quartz, n ine. 
Cyanite, = Williamsburgh, in mica slate, in small quanti- 
ties 
Argentine. In Williamsburgh. 
Sulphate of barytes is often seen forming the gangue in 
galena veins. 
Manganese is frequent in galena veins in avers It also 
forms a vein at Conway, and another at Cum 
Compact oxid of manganese. In Williamsburgh, in quartz: 
This manganese has a metallic lustre when broken only at 
certain spots. ‘This lustre is a steel gray. 
Tron Pyrites. In Williamsburgh, in quartz. 
_—- In Williamsburgh, of a superior quality ; also at 
Con 
White augite, (spodumene ? Ed.) In Williamsburgh. It is 
associated. with granite in beu 
y, found in a stone wall by the 
way side, as we rise the bill A at is 
stalactical, and the fracture ‘is meine Gor the centre of the 
stalactite. 
Granite veins in granite. 
Granite veins in granite, as well as in mica slate, are fre- 
quently met with in this region. i 
veins as much as any granite, or hornblende veins, seen in 
mica , are true veins. hese granite veins in granite 
are, I believe, found only in granite contiguous to mica slate, 
or very probably the granite in which they are situated, may 
be itself only immensely large granite veins in mica ‘slate ; 
