Minerals of Europe and America. — $68 
ART. XVHI.—Observations on the analogy between the 
Minerals of the North of Europe and of America, more 
—— as connected with the uniformity of their geo- 
logical situation in both countries—by WILLIAM Meap, 
M. D. Addressed to the Editor. 
Ir appears to me extraordinary that as yet little notice has 
been taken of the great resemblance that can be traced be- 
tween the minerals of North America, and those which have 
been found in the North of Europe, particularly in Norway 
and Sweden. This may arise partly from the want of opportu- 
nity of comparing them; but any person who isin possession 
of a good collection of specimens from those countries, will 
be at once struck; not only with the close similarity, amount- 
ing almost to identity, but will be able to trace the same 
geological character and géognostic situation throtighoat the the 
a series. This similarity is observed more particularly 
n those specimens which are found to accompany the primi- 
ps formation at Arendal in N orway, as well as in the same 
class of rocks in this country. It is not confined however to 
primitive range of mountains alone, «as = same resem~ 
blance can be frequently traced, when we 
ber of our minerals with those of Piedmont “ail even of the 
Hartz mountains 
It would be entering at present on too extensive a field to 
enumerate all the minerals in which this exact resemblance 
may be noticed ; I shall however briefly take asketch of those 
to which my attention has lately been attracted ; at the same 
time, I may observe that this has not entirely escaped 
the notice of some foreign mineralogists, whose attention has 
been called not only by the exact similitude of the substances, 
but by the more coco npc proofs of their identity, drawn 
from chemical analys 
In a letter which I Sass lately received from Monsieur Von 
Struve, a distinguished German mineralogist, with ge 
have long had the honor to correspond, he makes use of the 
following observations. 
*¢ On examining some specimens which you have lately fa- 
vored me with from North America, I have been struck with - 
the resemblance between some of them, and the minerals 
which we frequently obtain from the North of Europe ; for 
tustance, T observe an apple green mineral, accompanying 
