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a 
268 Lead Mines, &e. of Hadopshiee County, Mass, 
tudinal direction, although when there is a sudden swell, they 
frequently shun it, by turning a little to the_right or left, 
and then turn again into their wonted course, and pursue 
it until their concealment or termination. . 
It has often been supposed, that the galena veins of this 
region were all connected with that of Southampton, which 
has been said to extend to Hatfield and Leveret. For a long 
time I supposed this to be the fact, and that all these veins 
were only ramifications of the Southampton vein; but, after 
after the most careful examination, | am constrained to say, 
that they are all separate and distinct, and have no con- 
nexion with one another. ach has something peculiar 
to itself, and in no instance have they been known to run in- 
to one another. ould a vein, ten or. fifteen miles distant 
from another, with different minerals and a different gangue, 
and running in a different direction, have, naturally, any 
connexion with that vein? Such is the fact as regards the 
Southampton and Hatfield veins. The truth seems to be, that 
the granite-ranges, along the borders of the Connecticut val 
ley, are filled with different veins of galena, that have no con- 
nexion with one another. Fourteen have been already dis- 
covered, and probably many more will be. I have said that 
the true place for the galena veins is in granite of the oldest 
ormation, but that they sometimes extend into the mica slate 
above. Such is the fact; and I am of the opinion, that the si- 
enitic granite of Hatfield, containing the vein at that place, 
occupies both the place of mica slate and of the hornblende 
rock, and rests immediately upon granite ; at least the sienite 
and granite ran into one another at N orthampton, without 
any mica slate between them.  * 
m aware that it will be objected to the cotempo- 
raneous origin ef the galena veins with the rocks in which 
ey are situated, that the walls of the veins do not adhere to 
by a a —— are very determinate, being mark 
asted out of granite, of the oldest formation, having this in- 
Soe = an siete > £ 
ated substance adhering to them. Now, how 
'€ expect to find this substance in galena veins, wher 
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