Agricola, Georgius, De re metallica, 1912/1950

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    <archimedes>
      <text>
        <body>
          <chap>
            <pb pagenum="201"/>
            <figure number="114"/>
            <p type="caption">
              <s>A—SILLS. B—POINTED STAKES. C—CROSS-BEAMS. D—UPRIGHT PLANKS.
                <lb/>
              E—HOLLOWS. F—WINDS. G—COVERING DISC. H—SHAFTS. I—MACHINE
                <lb/>
              WITHOUT A COVERING.</s>
            </p>
            <p type="main">
              <s>The second machine of this genus turns the blowing wind into a shaft
                <lb/>
              through a long box-shaped conduit, which is made of as many lengths of
                <lb/>
              planks, joined together, as the depth of the shaft requires; the joints are
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              smeared with fat, glutinous clay moistened with water. </s>
              <s>The mouth of this con­
                <lb/>
              duit either projects out of the shaft to a height of three or four feet, or it does
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              not project; if it projects, it is shaped like a rectangular funnel, broader and
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              wider at the top than the conduit itself, that it may the more easily gather
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              the wind; if it does not project, it is not broader than the conduit, but
                <lb/>
              planks are fixed to it away from the direction in which the wind is blowing,
                <lb/>
              which catch the wind and force it into the conduit.</s>
            </p>
            <p type="main">
              <s>The third of this genus of machine is made of a pipe or pipes and
                <lb/>
              a barrel. </s>
              <s>Above the uppermost pipe there is erected a wooden barrel, four </s>
            </p>
          </chap>
        </body>
      </text>
    </archimedes>
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