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itilies, whidi arc thrown up with the
ilones, partly melted, and partly difcoloured
by the fire. We likewife found
feveral forts of pumice, and among
them one piece with fome fulphur in
it. The pumice was fometimes fo
much burnt, that it was as light as
tow ; the form and colour of it was
fometimes very fine, but at the fame
time fo foil, that it was difficult to remove
it from one place to another : of
the common lava we found both large
pieces and fmall bits, as likewife a
quantity o f black jafper, burned at
the extremities, and refembling trees
and branches. Among the ilones
thrown out o f the mountain we faw
fome flate o f a ilrong red colour.
L E T T E R
L E T T E R XXI .
To Profeilbr B erg M A N .
Of the hot fpouting JVater-fprings in
Iceland,
Stockholm, Ofl. 3, 1774.
Am o n g all the curioffiies in Iceland,
that nature prefents to the
eyes o f an attentive fpeflator to raife
his admiration, nothing can be compared
to the hot fpouting water-fprings
with which this country abounds.
The hot fprings at Aix-la-Chapelle,
farlibad, Bath, and Switzerland, and
feveral others found in Italy, are con-
iidered as very remarkable ; but to
my knowledge, except in the lail-
mentioned country, the water no where
becomes fo hot as to boil ; nor is it
any where known to be thrown fo
high as at the hot fpouting water-
fprings in Iceland.
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