238 Lead Mines, &c. of Hampshire County, Mass. 
Art. [X.—Notices of the Lead Mines and Veins of Hamp= 
shire County, Mass. and of the Geology and Mineralogy 
of that region ; by ALANSON Nasu. 
Extract of a letter from the Author to the Editor. 
WILLIAMSBURGH, March 8, 1827. 
s 
the public with the lead mines in Hampshire county, Massa- 
with the celebrated one at Southampton, and the Southamp- 
ton mine to extend to Hatfield and Leverett, 20 or 30 miles. 
In presenting a view of these mines, some difficulties oc- 
curred on account of their connexion with the rocks in which 
am, Sir, yours, &c. A. NASH. 
Granite, coloured indigo blue. 
This is a rock that has received and very jastly deserves 
considerable attention. It is the rock that furnishes us the 
beryls, spodumene, and curious tourmalines of this neighbor- 
¢ , as well as the most of our metallic veins. 
Williamsburgh, Conway, Goshen, Chesterfield, West- 
hampton, Southampton, Northampton, Whately, and Leve- 
ret, 1t seems to be the foundation rock upon which the others 
g > =| ha es 
ut as we rise, the mica slate gradually disappears, leav- 
ly takes hi under the mica slate, where, in turn, the mica 
slate or with very narrow prominences of granite, - 
