Agricola, Georgius, De re metallica, 1912/1950

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1dipped into the water; this operation of beating and cleansing is repeated
until it is all clean.
Afterward he places it on an iron grate or tripod; the
tripod is a palm and two digits high, one and a half digits wide, and its span
is two palms wide; then he puts burning charcoal under the tripod or grate,
in order again to dry the silver that was moistened by the water.
Finally,
the Royal Inspector42 in the employment of the King or Prince, or the owner,
lays the silver on a block of wood, and with an engraver's chisel he cuts out two
259[Figure 259]
A—MUFFLE. B—ITS LITTLE WINDOWS. C—ITS LITTLE BRIDGE. D—BRICKS. E—IRON
DOOR. F—ITS LITTLE WINDOW. G—BELLOWS. H—HAMMER-CHISEL. I—IRON RING
WHICH SOME USE INSTEAD OF THE TEST. K—PESTLE WITH WHICH THE ASHES PLACED IN
THE RING ARE POUNDED.
small pieces, one from the under and the other from the upper side.
These
are tested by fire, in order to ascertain whether the silver is thoroughly refined
or not, and at what price it should be sold to the merchants.
Finally he
impresses upon it the seal of the King or the Prince or the owner, and, near
the same, the amount of the weight.
There are some who refine silver in tests placed under iron or earthen­
ware muffles.
They use a furnace, on the hearth of which they place the test
containing the fragments of silver, and they place the muffle over it; the

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