Minerals of Europe and America. 307 
than in any other country. Crystals of augite of every zante: 
ty of form, and ofa very large size are found in those distric 
of the states of New-York and New Jersey, which oe 
beds of magnetic iron ere, but in no place more beautifully 
and perfectly crystalized than at Munro, in the state of New- 
Yerk. These crystals are found either in groups or single, 
and are of an olive green colour, differing only in i» 
from such as are obtained in rocks of a similar formation, and 
under similar circumstances, at Arendal in Norway. But a 
variety of augite has been found at ‘Kinga. and at 
Litchfield in Connecticut, which has not been discovered in 
Europe, and indeed i, it scarcely noticed by any of their wri- 
ters. It is found in large and small crystals, which are 
purely bie: generally in elongated four or six-sided prisms, 
nearly rectangular, sometimes truncated on two edges at the 
extremity ; imbedded at Kingsbridge in primitive limestone, 
and at Litchfield in dolomite. 
2. Sahlite. This is a variety of pyroxene, which was 
first observed in the primitive rocks of the North of Europe, 
and it affords another striking illustration of the complete 
identity of the minerals which are found in, the same forma- 
tions in America, as well as in Europe, and 3 the uniformi- 
ty of the structure which pervades ihe same class of rocks in 
both countries ; indeed many of the specimens of sahlite from 
each are so similar, that it is scarcely possible to distinguish 
them from each other, when in the same cabinets, without 
reference tothe labels. The finest yet discovered in Ameri- 
ca, were found in the state of New-York, particularly 
at Munro, and in the forest of Deane, where the specimens, 
generally of a dark green and bronze colour, with a fine lus- 
re, and lamellated structure, yield to mechanical division, 
the ‘result of which is an oblique four sided. prism, with 
rhombic bases. ‘The same specimen will also frequently ex- 
hibit a granular and a lamellated Encinn, and what renders 
the coincidence more remarkable, is, t here €, as well as at 
mane al with ores of magnetic iron. nhl variety, how- 
ever, of this mineral, has been, foun nd in this country, and 
precisely under the same geological circumstances. Nothing 
¢an exceed the beauty of the specimens which are found im 
