tSri'KT. Í 1.
ri;:"
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IT
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a: ;
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[ ¿38 ]
rallzecl : in the north, principally at
Hnfewick, and in the fouth at Krufe-
wick, there are brimftone mines that
they call Namas* I fliall referve the
bafalts for a particular letter.
l e t t e r
[ 239 ]
L E T T E R XX.
To Profeflbr B e r g m a n .
O f Mount Heckla.
Stockholm, Sept. 7, 1773.
n n HE caufe o f Heckla (or, as it is
JL called in the country, Eecklu-
fiall) having been more noticed than
many other volcanos o f as great extent,
and no lefs wonderful and in-
ftruaive, may partly be afcribed to its
having vomited fire fo frequently, and
partly to its fituation, which expofes it
to the fight o f all the ihips failing to
Greenland and North America: as we
confidered it with greater attention
than any other volcano on the iiland, I
will give you a defcription o f the ftate
in which we found it on the 24th o f
September 1772.
After we had feen many trails o f
lava, among which Garde and Hva-
leyre Hraun^were the moil confider-
3 able.
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