Agricola, Georgius
,
De re metallica
,
1912/1950
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these holes wedge-shaped pegs are driven, in order that the beams may remain
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fixed, and that the box may turn round, and may be turned toward the wind
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from whichever quarter of the sky it may blow. </
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<
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>In such a hearth they put </
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>A—BOX. B—PIVOT. C—TRANSVERSE WOOD BEAMS. D—GRATE. E—ITS FEET.
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F—BURNING WOOD. G—STICK. H—PANS IN WHICH THE BISMUTH IS MELTED.
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I—PANS FOR MOULDS. K—CAKES. L—FORK. M—BRUSH.
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an iron grate, as long and wide as the box and threequarters of a foot high;
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it has six feet, and there are so many transverse bars that they almost touch
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one another. </
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>On the grate they lay pine-wood and over it broken ore, and over
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this they again lay pine-wood. </
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>When it has been kindled the ore melts, out
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of which the bismuth drips down; since very little wood is burned, this is the
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most profitable method of smelting the bismuth. </
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<
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>The bismuth drips through
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the grate on to the hearth, while the other things remain upon the grate with
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the charcoal. </
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>When the work is finished, the workman takes a stick from the
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hearth and overturns the grate, and the things which have accumulated on
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it; with a brush he sweeps up the bismuth and collects it in a basket, and
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then he melts it in an iron pan and makes cakes. </
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it is cool, he turns the pans over, so that the cakes may fall out, using for
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this purpose a two-pronged fork of which one prong is again forked. </
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<
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immediately afterward he returns to his labours.</
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>END OF BOOK IX.</
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