Agricola, Georgius, De re metallica, 1912/1950

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    <archimedes>
      <text>
        <body>
          <chap>
            <pb pagenum="300"/>
            <p type="main">
              <s>Seven methods of washing are in common use for the ores of many
                <lb/>
              metals; for they are washed either in a simple buddle, or in a divided buddle,
                <lb/>
              or in an ordinary strake, or in a large tank, or in a short strake, or in a canvas
                <lb/>
              strake, or in a jigging sieve. </s>
              <s>Other methods of washing are either peculiar
                <lb/>
              to some particular metal, or are combined with the method of crushing wet
                <lb/>
              ore by stamps.</s>
            </p>
            <p type="main">
              <s>A simple buddle is made in the following way. </s>
              <s>In the first place, the head
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              is higher than the rest of the buddle, and is three feet long and a foot and a half
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              broad; this head is made of planks laid upon a timber and fastened, and
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              on both sides, side-boards are set up so as to hold the water, which flows in
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              through a pipe or trough, so that it shall fall straight down. </s>
              <s>The middle of
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              the head is somewhat depressed in order that the broken rock and the larger
                <lb/>
              metallic particles may settle into it. </s>
              <s>The buddle is sunk into the earth to a
                <lb/>
              depth of three-quarters of a foot below the head, and is twelve feet long and
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              a foot and a half wide and deep; the bottom and each side are lined with
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              planks to prevent the earth, when it is softened by the water, from falling
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              in or from absorbing the metallic particles. </s>
              <s>The lower end of the buddle is
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              obstructed by a board, which is not as high as the sides. </s>
              <s>To this straight
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              buddle there is joined a second transverse buddle, six feet long and a foot
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              and a half wide and deep, similarly lined with planks; at the lower </s>
            </p>
          </chap>
        </body>
      </text>
    </archimedes>
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