Agricola, Georgius, De re metallica, 1912/1950

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    <archimedes>
      <text>
        <body>
          <chap>
            <pb pagenum="335"/>
            <figure number="192"/>
            <p type="caption">
              <s>A—TROUGH. B—ITS OPEN END. C—END THAT MAY BE CLOSED. D—STREAM.
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              E—HOE. F—END-BOARD. G—BAG.
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              with a small quantity of heavy sand, have settled in the trough, they wash
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              in a bowl and collect in bags and carry away with them.</s>
            </p>
            <p type="main">
              <s>Some people wash this kind of sand in a large bowl which can easily be
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              shaken, the bowl being suspended by two ropes from a beam in a building.
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              </s>
              <s>The sand is thrown into it, water is poured in, then the bowl is shaken, and
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              the muddy water is poured out and clear water is again poured in, this being
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              done again and again. </s>
              <s>In this way, the gold particles settle in the back part
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              of the bowl because they are heavy, and the sand in the front part because it
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              is light; the latter is thrown away, the former kept for smelting. </s>
              <s>The one
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              who does the washing then returns immediately to his task. </s>
              <s>This method
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              of washing is rarely used by miners, but frequently by coiners and goldsmiths
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              when they wash gold, silver, or copper. </s>
              <s>The bowl they employ has only
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              three handles, one of which they grasp in their hands when they shake the
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              bowl, and in the other two is fastened a rope by which the bowl is hung from
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              a beam, or from a cross-piece which is upheld by the forks of two upright
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              posts fixed in the ground. </s>
              <s>Miners frequently wash ore in a small bowl to test </s>
            </p>
          </chap>
        </body>
      </text>
    </archimedes>
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