Agricola, Georgius, De re metallica, 1912/1950

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    <archimedes>
      <text>
        <body>
          <chap>
            <pb pagenum="315"/>
            <p type="main">
              <s>This method of washing has lately undergone a considerable change; for
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              the launder which carries the water, mixed with the crushed tin-stone and
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              fine sand which flow from the openings of the screen, does not reach to a
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              transverse trough which is inside the same room, but runs straight through
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              a partition into a small settling-pit. </s>
              <s>A boy draws a three-toothed rake
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              through the material which has settled in the portion of the launder outside
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              the room, by which means the larger sized particles of tin-stone settle at the
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              bottom, and these the washer takes out with the wooden shovel and carries
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              into the room; this material is thrown into an ordinary strake and swept
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              with a wooden scrubber and washed. </s>
              <s>As for those tin-stone particles which
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              the water carries off from the strake, after they have been brought back on to
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              the strake, he washes them again until they are clean.</s>
            </p>
            <p type="main">
              <s>The remaining tin-stone, mixed with sand, flows into the small settling-pit
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              which is within the building, and this discharges into two large buddles. </s>
              <s>The
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              tin-stone of moderate size, mixed with those of fairly large size, settle in the
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              upper part, and the small size in the lower part; but both are impure, and
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              for this reason they are taken out separately and the former is washed twice, </s>
            </p>
            <figure number="175"/>
            <p type="caption">
              <s>A—FIRST LAUNDER. B—THREE-TOOTHED RAKE. C—SMALL SETTLING PIT. D—LARGE
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              BUDDLE. E—BUDDLE RESEMBLING THE SIMPLE BUDDLE. F—SMALL ROLLER. </s>
              <s>G—
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              BOARDS. H—THEIR HOLES. I—SHOVEL. K—BUILDING. L—STOVE. (THIS PICTURE
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              DOES NOT ENTIRELY AGREE WITH THE TEXT).</s>
            </p>
          </chap>
        </body>
      </text>
    </archimedes>
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