Brush and Dana—Fairfield County Minerals, 45 
Art. V.—On the Mineral Locality in Fairfield County, Connee- 
ticul; by Grorce J. BrusH and EpwarpS. Dana. Third 
paper. 
past year, so far as ey relate to the manganesian sl 
ves almost 
is was quite indifferent ; 
we did, indeed, find the spot aimed at and took from it a small 
quantity of the minerals in which we were interested, but it 
was soon clear that this deposit was exhausted, and we must 
look farther for other and independent ones. Having but little — 
to guide us in our explorations, we extended them quite widely 
in the seemingly most probable directions ma a nded, in 
time and money, more than our final success w , perhaps, 
have warranted. We discovered, however, be haere ng 
points in regard to the minerals oceurring in : e vein as a 
whole, which we intend to describe in another 
manner. ‘These associated minerals are more parcealens feld- 
spar, usually albite, and spodumene. The latter mineral is very 
generally altered, and the various products of its alteration, 
of which cymatolite i is the most common, we shall describe in 
another place. The lithiophilite, however, though often coa 
black externally, is otherwise quite free from alteration ; the 
only exception to this was in the case of that first discovered, 
which was situated near the surface of the ledge and was much 
oxidized. It will be remembered that, in what we have allu- 
ded to as the original — a —* the lithiophilite 
occurred very sparingly and o an occasional nucleus o 
masses of the abundant Bick oie the product of its alter- 
ation. This is described in our Hiepirce paper, and analyses 
of these oxidation products are there give 
* This Journal, July and August, 1878, om 1879. 
