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64 SWEDENBORG’S TRAVELS AND DIARIES. [ Doc. 205.
which is lined with sods. The thicker and heavier part of
the ore remains on the higher steps or platforms ; the smaller
and lighter is carried to the lower steps, and to the inclined
plane. 4. After the sods are washed out, the powder which
has lodged in them is taken to bare inclined planes without
any sods, and where there are two steps before the pulverized
ore reaches the inclined planes themselves. These bare sur
faces are not so steep as those which are furnished with sods ;
they are, however, of the same length. At their base is a
box, where the pulverized ore gradually collects after having
been washed first. In the mean time, while the powder is ap
proaching this box, it is stirred and moved about, until at last
the whole of it is deposited in the box, all the stony and
lighter parts having been washed out of it. There are
also double planes or areas which are broad ; the upper one
is not lined with sods ; from this the powder is directed into
an oblong box, standing at its lower extremity; from this
[the turbid stream is carried] to the lower plane or area which
is covered with sods, and where the finer portion of the ore
is collected.
THE SILVER SMELTING WORKS AT JOACHIMSTHAL.
There are only two furnaces for this purpose, which are
in one building in connection with a secreting oven or Treib
herd. The furnaces are of the kind called Krummofen ; they
are two ells high, and interiorly an ell and three-quarters high,
and an ell wide. The reservoir, where all the stone during
its fusion with the silver-bearing lead is collected, extends to
some distance outside the furnace. This furnace is arched on
both sides above and around the opening, and thus terminates
in the chimney. There are two reservoirs or basins, one
above and one below; into these the silver-bearing lead is
discharged, when the hole is opened ; the lower basin is three
quarters of an ell below the upper one, in a straight line.
The bellows are of wood, and rather large; in their upper
frame is a valve closed by a handle, by which the draught
can, if necessary, be moderated ; this is done whenever lead is
fused, for which the same furnaces are used. The blast-hole
is ample and broad; its diameter amounts to two and a half, if
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