Agricola, Georgius, De re metallica, 1912/1950

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    <archimedes>
      <text>
        <body>
          <chap>
            <pb pagenum="334"/>
            <figure number="191"/>
            <p type="caption">
              <s>A—TRAY. B—BOWL-LIKE DEPRESSION. C—HANDLES.</s>
            </p>
            <p type="main">
              <s>Sand mixed with particles of gold is also washed in a tray, or in a trough
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              or bowl. </s>
              <s>The tray is open at the further end, is either hewn out of a
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              squared trunk of a tree or made out of a thick plank to which side-boards
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              are fixed, and is three feet long, a foot and a half wide, and three digits
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              deep. </s>
              <s>The bottom is hollowed out into the shape of an elongated bowl whose
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              narrow end is turned toward the head, and it has two long handles, by which
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              it is drawn backward and forward in the river. </s>
              <s>In this way the fine sand
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              is washed, whether it contains particles of gold or the little black stones from
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              which tin is made.</s>
            </p>
            <p type="main">
              <s>The Italians who come to the German mountains seeking gold, in order
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              to wash the river sand which contains gold-dust and garnets,
                <emph type="sup"/>
              19
                <emph.end type="sup"/>
              use a fairly
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              long shallow trough hewn out of a tree, rounded within and without, open
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              at one end and closed at the other, which they turn in the bed of the stream
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              in such a way that the water does not dash into it, but flows in gently.
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              </s>
              <s>They stir the sand, which they throw into it, with a wooden hoe, also
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              rounded. </s>
              <s>To prevent the particles of gold or garnets from running out with
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              the light sand, they close the end with a board similarly rounded, but lower
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              than the sides of the trough. </s>
              <s>The concentrates of gold or garnets which, </s>
            </p>
          </chap>
        </body>
      </text>
    </archimedes>
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