Agricola, Georgius
,
De re metallica
,
1912/1950
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fixed, so that it may be raised as much as is convenient. </
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<
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>Above this wheel
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there are boards to prevent the water from dripping down and wetting it, for
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if it becomes wet the brake will not grip the machine so well. </
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<
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>Near the
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other drum is a pin from which hangs a chain, in the last link of which there
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is an iron hook three feet long; a ring is fixed to the bottom of the bucket,
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and this hook, being inserted into it, holds the bucket back so that the water
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may be poured out or the fragments of rock emptied.</
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>The miners either carry, draw, or roll down the mountains the ore which
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is hauled out of the shafts by these five machines or taken out of the
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tunnels. </
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<
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>In the winter time our people place a box on a sledge and draw
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it down the low mountains with a horse; and in this season they
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also fill sacks made of hide and load them on dogs, or place two or
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three of them on a small sledge which is higher in the fore part and lower at
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the back. </
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<
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>Sitting on these sacks, not without risk of his life, the bold
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driver guides the sledge as it rushes down the mountain into the valleys with
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a stick, which he carries in his hand; when it is rushing down too
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quickly he arrests it with the stick, or with the same stick brings it back to
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the track when it is turning aside from its proper course. </
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<
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<
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>A—SLEDGE WITH BOX PLACED ON IT. B—SLEDGE WITH SACKS PLACED ON IT. C—STICK.
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D—DOGS WITH PACK-SADDLES. E—PIG-SKIN SACKS TIED TO A ROPE.</
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