258 Lead Mines, &c. of Hampshire County, Mass. 
domorphous crystalizations. The veins of argentine would 
be called by some dykes; probably this appellation, as they 
now appear, is correct, but I think that any one who views 
this cliff must say that the whole has been in some way 
forced up above the surface, or thrown back from the metal- 
lic vein, and that the argentine once formed veins in the 
rocks. ¢ 
No. 14. At this locality are seen blende, pyritous copper, 
and galena. It is in the south-west corner of Northampton, 
on the side of a steep hill. The vein, three or four feet wide, 
is in granite, which rises above geest, and runs along in the 
granite, several rods, in a longitudinal direction. The range 
of the hills is north-easterly, and the vein follows it. Indeed 
the general course of all the hills and mountains in this re- 
gion is the same, and the veins, except the Hatfield one, con- 
form to it; that is, they all run, more or less, in a north-east 
direction. is vein was considerably wrought, several 
years since, and is supposed to be connected with t cele- 
brated Southampton mine ; it is also known as a place de- 
nominated “‘ the minerals.” 
0. 15 is the Southampton vein, which has been heretofore 
amply described. One circumstance, however, I have 
druses are met with, in great numbers, in the granite. These 
es Ehis-is in Williamsburgh, on a low or wet 
piece of ground, 30 rods south of the sad leading to North- 
