Agricola, Georgius, De re metallica, 1912/1950

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    <archimedes>
      <text>
        <body>
          <chap>
            <pb pagenum="345"/>
            <figure number="200"/>
            <p type="caption">
              <s>A—LAUNDER. B—CROSS TROUGH. C—TWO SPOUTS. D—BOXES. E—PLATE. </s>
              <s>F—
                <lb/>
              GRATING. G—SHOVELS. H—SECOND CROSS TROUGH. I—STRAKE. K—WOODEN
                <lb/>
              SCRUBBER. L—THIRD CROSS TROUGH. M—LAUNDER. N—THREE-TOOTHED RAKE.
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              and the water carries off the valueless sand into the creek. </s>
              <s>This method
                <lb/>
              of washing is most advantageous, for four men can do the work of washing
                <lb/>
              in two boxes, while the last method, if doubled, requires six men, for it requires
                <lb/>
              two boys to throw the material to be washed on to the plate and to stir it
                <lb/>
              with iron shovels; two more are required with wooden scrubbers to keep
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              stirring the sand, mixed with the tin-stone, under the plate, and to push it
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              toward the upper end of the box; further, two foremen are required
                <lb/>
              to clean the tin-stone in the way I have described. </s>
              <s>In the place of a plate
                <lb/>
              full of holes, they now fix in the boxes a grating made of iron wire as
                <lb/>
              thick as the stalks of rye; that these may not be depressed by the weight
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              and become bent, three iron bars support them, being laid crosswise under­
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              neath. </s>
              <s>To prevent the grating from being broken by the iron shovels with
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              which the material is stirred in washing, five or six iron rods are placed on
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              top in cross lines, and are fixed to the box so that the shovels may rub them
                <lb/>
              instead of the grating; for this reason the grating lasts longer than the </s>
            </p>
          </chap>
        </body>
      </text>
    </archimedes>
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