Full resolution (JPEG) - On this page / på denna sida - Sidor ...
<< prev. page << föreg. sida << >> nästa sida >> next page >>
Below is the raw OCR text
from the above scanned image.
Do you see an error? Proofread the page now!
Här nedan syns maskintolkade texten från faksimilbilden ovan.
Ser du något fel? Korrekturläs sidan nu!
This page has never been proofread. / Denna sida har aldrig korrekturlästs.
Doc. 205.] 49
SWEDENBORG’S TRAVELS IN 1733.
eleven of these furnaces or works produce annually about 1200
hundred-weight of tin.
Some of the pulverized ore is, besides, carried away from
the washing grounds and the crushing boxes into the passing
stream ; but the stream is checked in many places by dams,
and the ore which is thus rescued, is washed on inclined
planes, constructed on the usual plan, and afterwards con
veyed to the furnace.
August 7. I reached Lauterbach. Here also tin ore is
smelted ; there is one furnace at work which is still narrower
than those mentioned above ; the ore is richer, and its matrix
approaches more closely to that of the yellow species.
On my way to Altsattel I saw an iron-work, and also under
the same roof a blast-furnace for iron ore, which was only from
four to four and a half ells high, while its width or its dia
meter in the middle was an ell and a quarter; for interior
ly it was round. The opening at the side is approached by
steps, so that the ore can be conveniently thrown in. During
a week from thirty to forty hundred-weight of iron are thrown
in, and every day one fuder, or four simple Swedish pots,
(testa) of coal is used. Every week ten hundred-weight of
iron are obtained. The ore itself is rather poor. It is swamp
ore, which comes in crusts and in powder, and is almost of
a yellow colour.
At Altsattel vitriol is boiled, and sulphur sublimated. With
respect to the sulphur, there is an oven from two and a half
to three ells high, with twelve apertures in the roof, through
which the flame may strike. The oven is nine ells long, and
three ells broad ; at each extremity there is an outlet or door ;
around the two extremities there is a breadth of three ells
and a quarter; for the approaches are wider. The oven itself,
however, where the pans or retorts for sublimation are, is not
so long; its length being simply seven ells, and its width an
ell and a half. There are two stories of these pans or retorts ;
the upper row contains five, and the lower six, retorts ; alto
gether there are eleven ; they are of clay, and each is half a
foot in diameter. On the side where the sulphur is collected,
the vessels project more, and a tile is placed on the top;
and soon a square iron receiver, three-quarters of a foot high
4
<< prev. page << föreg. sida << >> nästa sida >> next page >>
