A—AREA. B—WOOD. C—ORE. D—CONE-SHAPED PILES.
E—CANAL.
same ore is soaked with water and smeared over it and beaten on with shovels;
some workers, if they cannot obtain such fine sand, cover the pile with char
coal-dust, just as do charcoal-burners. But at Goslar, the pile, when it has
been built up in the form of a cone, is smeared with atramentum sutorium
rubrum5, which is made by the leaching of roasted pyrites soaked with water.
In some districts the ore is roasted once, in others twice, in others three times,
as its hardness may require. At Goslar, when pyrites is roasted for the third
time, that which is placed on the top of the pyre exudes a certain greenish,
dry, rough, thin substance, as I have elsewhere written6; this is no more
easily burned by the fire than is asbestos. Very often also, water is put on
same ore is soaked with water and smeared over it and beaten on with shovels;
some workers, if they cannot obtain such fine sand, cover the pile with char
coal-dust, just as do charcoal-burners. But at Goslar, the pile, when it has
been built up in the form of a cone, is smeared with atramentum sutorium
rubrum5, which is made by the leaching of roasted pyrites soaked with water.
In some districts the ore is roasted once, in others twice, in others three times,
as its hardness may require. At Goslar, when pyrites is roasted for the third
time, that which is placed on the top of the pyre exudes a certain greenish,
dry, rough, thin substance, as I have elsewhere written6; this is no more
easily burned by the fire than is asbestos. Very often also, water is put on
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