Agricola, Georgius, De re metallica, 1912/1950

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    <archimedes>
      <text>
        <body>
          <chap>
            <p type="main">
              <s>
                <pb pagenum="161"/>
              which they unload separately and crush and wash. </s>
              <s>When they draw up
                <lb/>
              buckets of water they empty the water through the hopper into a trough,
                <lb/>
              through which it flows away.</s>
            </p>
            <figure number="88"/>
            <p type="caption">
              <s>A—TIMBER PLACED IN FRONT OF THE SHAFT. B—TIMBER PLACED AT THE BACK OF THE
                <lb/>
              SHAFT. C—POINTED STAKES. D—CROSS-TIMBERS. E—POSTS OR THICK PLANKS.
                <lb/>
              F—IRON SOCKETS. G—BARREL. H—ENDS OF BARREL. I—PIECES OF WOOD.
                <lb/>
              K—HANDLE. L—DRAWING-ROPE. M—ITS HOOK. N—BUCKET. O—BALE OF THE
                <lb/>
              BUCKET.</s>
            </p>
            <p type="main">
              <s>The next kind of machine, which miners employ when the shaft is
                <lb/>
              deeper, differs from the first in that it possesses a wheel as well as cranks.
                <lb/>
              </s>
              <s>This windlass, if the load is not being drawn up from a great depth, is turned
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              by one windlass man, the wheel taking the place of the other man. </s>
              <s>But if the
                <lb/>
              depth is greater, then the windlass is turned by three men, the wheel being
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              substituted for a fourth, because the barrel having been once set in motion,
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              the rapid revolutions of the wheel help, and it can be turned more easily.
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              </s>
              <s>Sometimes masses of lead are hung on to this wheel, or are fastened to the
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              spokes, in order that when it is turned they depress the spokes by their weight
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              and increase the motion; some persons for the same reason fasten into the
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              barrel two, three, or four iron rods, and weight their ends with lumps of lead.
                <lb/>
              </s>
              <s>The windlass wheel differs from the wheel of a carriage and from the one </s>
            </p>
          </chap>
        </body>
      </text>
    </archimedes>