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.
58 SWEDENBORG’S TRAVELS AND DIARIES. [ Doc. 205.
THE BLAST-FURNACE FOR IRON NEAR HANS JÜRGENSTADT IN BOHEMIA,
This blast-furnace is exteriorly square in form, as is common
ly the case; but it is to be observed, that its pectoral walls,
where the bellows are placed, and where also the molten iron
is discharged, are arched, so that the whole perpendicular
face of it may be seen, and that the structure does not ascend
obliquely, as in Sweden. 2. The blast-hole is of copper, and
altogether formed as in open fire-places where iron is heated;
its direction is horizontal, its figure conical, and on the out
side it is ampler. 3. The cavity for the fire is built of sand
stone ; two of the stones at the side are three quarters of an
ell thick, and an ell and a quarter long; the hearth stone is
an ell and a quarter broad, which is also the length of the
chamber for the fire, which does not differ much from its
breadth. The height of the furnace is from eight to nine
ells to the opening above ; its interior form is square. The
upper opening is an ell and a quarter square. The furnace
itself is wider about the belly, and more contracted towards
the lower reservoir. 4. Twice a day or more frequently the
metal is discharged, and each time to the amount of from ten
to twelve hundred-weight; the fire chamber can contain twelve
hundred-weight. They say that the yield consists of one hundred
weight an hour, or 130 hundred-weight a week. For each
hundred-weight of iron one kübel and two-thirds, i. e. twenty
pails (tonne) of charcoal are consumed ; five ofthese [kübel] make
one fuder, or about three and a half Swedish pots (testa).
The operation of smelting is said to be continued there for
half a year. The ore itself looks red, like schist ; it is rich
and yields iron of a good quality.
THE IRON-WORKS, OR ROLLING MILL NEAR HANS JÜRGENSTADT.
The furnace is built in the usual fashion ; a receptacle is
built of iron plates ; the thickest is the farthest off. The depth
of the receptacle is eight inches, its length an ell and a quarter,
its breadth about an ell ; the blast-hole is of copper and coni
cal, and placed very obliquely. Every week 32 hundred
weight of iron is smelted and worked up into short rods.
<< prev. page << föreg. sida << >> nästa sida >> next page >>
