Agricola, Georgius, De re metallica, 1912/1950

Table of figures

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    <archimedes>
      <text>
        <body>
          <chap>
            <p type="main">
              <s>
                <pb pagenum="218"/>
              worked, though they were not deficient in silver. </s>
              <s>The fifth cause are the
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              fierce and murderous demons, for if they cannot be expelled, no one escapes
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              from them. </s>
              <s>The sixth cause is that the underpinnings become loosened
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              and collapse, and a fall of the mountain usually follows; the underpinnings
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              are then only restored when the vein is very rich in metal. </s>
              <s>The seventh
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              cause is military operations. </s>
              <s>Shafts and tunnels should not be re-opened
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              unless we are quite certain of the reasons why the miners have deserted them,
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              because we ought not to believe that our ancestors were so indolent and
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              spiritless as to desert mines which could have been carried on with profit.
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              </s>
              <s>Indeed, in our own days, not a few miners, persuaded by old women's tales,
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              have re-opened deserted shafts and lost their time and trouble. </s>
              <s>Therefore,
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              to prevent future generations from being led to act in such a way, it is
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              advisable to set down in writing the reason why the digging of each shaft or
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              tunnel has been abandoned, just as it is agreed was once done at Freiberg,
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              when the shafts were deserted on account of the great inrush of water.</s>
            </p>
            <p type="head">
              <s>END OF BOOK VI.</s>
            </p>
            <figure number="126"/>
          </chap>
        </body>
      </text>
    </archimedes>
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