Agricola, Georgius
,
De re metallica
,
1912/1950
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lumps of ore, rich in gold or silver, are put by the sorters on the stone and
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broken up with a broad, but not thick, hammer; they either break them into
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pieces and throw them into one vessel, or they break and sort—whence they
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get their name—the more precious from the worthless, throwing and collecting
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them separately into different vessels. </
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<
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>Other men crush the lumps of ore
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less rich in gold or silver, which have likewise been put on the stone, with a
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broad thick hammer, and when it has been well crushed, they collect it and
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throw it into one vessel. </
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>There are two kinds of vessels; one is deeper, and a
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little wider in the centre than at the top or bottom; the other is not so deep
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though it is broader at the bottom, and becomes gradually a little narrower
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toward the top. </
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>The latter vessel is covered with a lid, while the former is not
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covered; an iron rod through the handles, bent over on either end, is
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grasped in the hand when the vessel is carried. </
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>But, above all, it behooves
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the sorters to be assiduous in their labours.</
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>By another method of breaking ore with hammers, large hard frag
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ments of ore are broken before they are burned. </
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>The legs of the workmen
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—at all events of those who crush pyrites in this manner with large hammers
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in Goslar—are protected with coverings resembling leggings, and their hands </
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<
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>A—PYRITES. B—LEGGINGS. C—GLOVES. D—HAMMER.</
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