Agricola, Georgius, De re metallica, 1912/1950

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1nately backward and forward. By this movement the small particles
fall through the bottom of the sieve.
In order that the end of the pole
may be easily placed in the rope, a stick, two palms long, holds open the
lower part of the rope as it hangs double, each end of the rope being tied to
the beam; part of the rope, however, hangs beyond the stick to a length of
half a foot.
A large box is also used for this purpose, of which the bottom
is either made of a plank full of holes or of iron netting, as are the other
boxes.
An iron bale is fastened from the middle of the planks which form
its sides; to this bale is fastened a rope which is suspended from a wooden
beam, in order that the box may be moved or tilted in any direction.
157[Figure 157]
A—BOX. B—BALE. C—ROPE. D—BEAM. E—HANDLES. F—FIVE-TOOTHED RAKE.
G—SIEVE. H—ITS HANDLES. I—POLE. K—ROPE. L—TIMBER.
There are two handles on each end, not unlike the handles of a wheel­
barrow; these are held by two workmen, who shake the box to and fro.
This box is the one principally used by the Germans who dwell in the
Carpathian mountains.
The smaller particles are separated from the larger
ones by means of three boxes and two sieves, in order that those which
pass through each, being of equal size, may be washed together; for the
bottoms of both the boxes and sieves have openings which do not let
through broken rock of the size of a hazel nut.
As for the dry remnants

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