Agricola, Georgius, De re metallica, 1912/1950

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          <chap>
            <p type="caption">
              <s>
                <pb pagenum="346"/>
              plates, because it remains intact, while the rods, when worn by rubbing, can
                <lb/>
              easily be replaced by others.</s>
            </p>
            <p type="main">
              <s>Miners use the seventh method of washing when there is no stream of
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              water in the part of the mountain which contains the black tin, or particles of
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              gold, or of other metals. </s>
              <s>In this case they frequently dig more than fifty
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              ditches on the slope below, or make the same number of pits, six feet long,
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              three feet wide, and three-quarters of a foot deep, not any great distance
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              from each other. </s>
              <s>At the season when a torrent rises from storms of
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              great violence or long duration, and rushes down the mountain, some of
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              the miners dig the metalliferous material in the woods with broad hoes and </s>
            </p>
            <figure number="201"/>
            <p type="caption">
              <s>A—PITS. B—TORRENT. C—SEVEN-PRONGED FORK. D—SHOVEL.
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              drag it to the torrent. </s>
              <s>Other miners divert the torrent into the ditches or
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              pits, and others throw the roots of trees, shrubs, and grass out of the ditches
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              or pits with seven-pronged wooden forks. </s>
              <s>When the torrent has run down,
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              they remove with shovels the uncleansed tin-stone or particles of metal which
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              have settled in the ditches or pits, and cleanse it.</s>
            </p>
            <p type="main">
              <s>The eighth method is also employed in the regions which the Lusitanians
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              hold in their power and sway, and is not dissimilar to the last. </s>
              <s>They drive </s>
            </p>
          </chap>
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