Agricola, Georgius, De re metallica, 1912/1950

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    <archimedes>
      <text>
        <body>
          <chap>
            <p type="main">
              <s>
                <pb pagenum="281"/>
              are placed two cross-beams joined together, one in front and one in the back,
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              the ends of which are mortised into the upright posts already mentioned.
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              </s>
              <s>Through each mortise is bored a hole, into which is driven an iron clavis
                <gap/>
                <lb/>
              one end of the clavis has two horns, and the other end is perforated in order
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              that a wedge driven through, binds the beams more firmly; one horn of the
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              clavis turns up and the other down. </s>
              <s>Three and a half feet above the cross-</s>
            </p>
          </chap>
        </body>
      </text>
    </archimedes>
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