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Doc. 205.] SWEDENBORG’S TRAVELS IN 1733 . 61
There all that powder is washed which has been received in
a reservoir outside the house, and which is very poor. The
bottom of the crushing chest is of iron ; it is also made of a
very hard stone which resists the hammers very well.
The town of Hans Jürgenstadt itself is situated over its
mines , at a height of about eighty ells. At the foot of the
mountain are above twenty horizontal entrances , called
Stollen, all of which lead to the mines ; one of these is
4500 ells long.
August 11. I arrived at the town of Platten , which is the
first town on entering Bohemia, and where there is nothing
except a quantity of tin ore; yet I was able to see there a
Seifenwerk, where the tin ore is obtained by washing it out of
heaps. For there are large mountains or heaps of sand which
are likewise impregnated with tin ore , expecially the black
kind ; and which they contain in large pieces, as well as in
fine powder. Thither the water is directed, which rushes head
long through such a heap, and where the stream of water flows
the sand is agitated, until at last the heaviest portion settles
at the bottom, while the lighter remains on the surface, and
is cast aside. They continue to labour until they reach a certain
depth; then the water is directed sideways, when by a con
tinual action to and fro the heavier metallic portion is se
parated by the streamlet; and in this wise they are able to
go through the whole mountain to a certain depth, and also
all around wherever the water can be led.
THE BLAST-FURNACE FOR TIN AT PLATTEN.
There is only one blast-furnace for tin in this place, and
the tin which is here obtained, is likewise beaten into rolls.
Every two hours the metal is drawn from the higher into the
lower reservoir or basin ; and every two hours they say they
manufacture from ten to twelve rolls of tin, of which each
weighs from five to six pounds. The furnace interiorly is eight
inches wide and twelve inches long; in its upper part the width
is the same, but its length amounts to sixteen inches ; its height
is three ells and a quarter. The blast-hole, which is of sand
stone, is very oblique, and narrower than in other places. Three
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