Agricola, Georgius, De re metallica, 1912/1950

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              <s>
                <pb pagenum="168"/>
              fixed, so that it may be raised as much as is convenient. </s>
              <s>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. </s>
              <s>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.</s>
            </p>
            <p type="main">
              <s>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. </s>
              <s>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. </s>
              <s>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. </s>
              <s>Some of the </s>
            </p>
            <figure number="93"/>
            <p type="caption">
              <s>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.</s>
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