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.] SWEDENBORG’S TRAVELS IN 1733. 63
in the upper frame, which is closed up by a handle when less
.
air is required as in the fusion of lead, where the draught
can be adjusted to suit the circumstances.
The same evening I arrived at Joachimsthal, where I stayed
two days.
August 12. I spent the day at Joachimsthal. This town,
which is situated among mountains containing iron ore, was
made a mining town in 1516. The best mines near the
town are the " Hubert" and " Einigkeit" (concord) mines. They
all supply rich ores, viz. native silver, vitreous silver ore, Roth
gulden, Weissgulden, and many others. The ore is generally
obtained in slate, and most of it contains cobalt and arsenic, but
no lead ; the lead ore is purchased at Bleistadt, and fused here.
The poorer metal is crushed into powder and washed.
1. It is crushed by three hammers in one box ; these hammers
work there in the same manner as in other places. The
hammers are rather large. The receptacle, into which the ore
is thrown and from which it is supplied to the hammers, is of
an oblong shape ; and the ore is shaken out, not by means of
a lever, but, as in Saxony, by means of an oblique direction of
the box itself, one end of it being raised by the hand when a
supply is wanted. 2. The troughs which lead out of the
crushing box are not longer than two ells, and they are
provided with two steps or benches. All the remaining
turbid water is allowed to flow out into the river or brook
which passes by, and not received first in a reservoir, as
in other places. 3. The pulverized mass which is taken out
of these troughs, is first washed on the Schlammbank, which
is deeper and wider than in Saxony, although it is otherwise
of the same form, and the work is done in a similar manner.
The finer powder is directed on to an inclined plane, provided
with sods. It is not very long , but steeper than those
which are bare ; on this the washing is performed in the
usual manner. One difference is noticed here , viz. that
there are four steps before the ore reaches the inclined
plane itself ; the pulverized ore is put on the highest step
and thence led down to the one below, which is only a
foot long ; thence to the third and fourth, which are like
wise a foot in length ; and, finally, to the inclined plane itself
<< prev. page << föreg. sida << >> nästa sida >> next page >>
