306 Scientific Intelligence. 
> 
gangue of fluor, quartz and mica, and are intercalated between 
e 
as transverse veins. There are, it is true, in their immediate 
vicinity, impregnations in the mica-schists which simulate closely 
those of contemporaneous origin, but the great masses of pyritous 
a) 
crystals are often curved, and sometimes partially broken across, 
and their transverse fissures filled with sulphurets, which are also 
bro white in color.. The disposition © eu" 
more or less regular, and in some cases, at leas rallel eee 
plane of the lode. In one instance a layer of prisms of W 
chalcopyrite. Layers of vitreous translucent quartz, with 
masses of sulphids, are also found, having all the aspects 
ordinary quartzose veinstones. A ale cinnamon-colored ain 
i r, is 
latter also sometimes includes large and fine crystals of misp as 
a : 
the present workings at the East Tennessee Mine would, I think, 
convince the student familiar with veinstones that this 
