Agricola, Georgius, De re metallica, 1912/1950

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    <archimedes>
      <text>
        <body>
          <chap>
            <pb pagenum="162"/>
            <figure number="89"/>
            <p type="caption">
              <s>A—BARREL. B—STRAIGHT LEVERS. C—USUAL CRANK. D—SPOKES OF WHEEL.
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              E—RIM OF THE SAME WHEEL.
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              which is turned by water power, for it lacks the buckets of a water-wheel
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              and it lacks the nave of a carriage wheel. </s>
              <s>In the place of the nave it has a thick
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              barrel, in which are mortised the lower ends of the spokes, just as their upper
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              ends are mortised into the rim. </s>
              <s>When three windlass men turn this machine,
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              four straight levers are fixed to the one end of the barrel, and to the
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              other the crank which is usual in mines, and which is composed of two limbs,
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              of which the rounded horizontal one is grasped by the hands; the rect­
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              angular limb, which is at right angles to the horizontal one, has mortised in its
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              lower end the round handle, and in the upper end the end of the barrel. </s>
              <s>This
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              crank is worked by one man, the levers by two men, of whom one pulls while
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              the other pushes; all windlass workers, whatsoever kind of a machine they
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              may turn, are necessarily robust that they can sustain such great toil.</s>
            </p>
            <p type="main">
              <s>The third kind of machine is less fatiguing for the workman, while it
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              raises larger loads; even though it is slower, like all other machines which
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              have drums, yet it reaches greater depths, even to a depth of 180 feet. </s>
              <s>It
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              consists of an upright axle with iron journals at its extremities, which
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              turn in two iron sockets, the lower of which is fixed in a block set in the
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              ground and the upper one in the roof beam. </s>
              <s>This axle has at its lower end a </s>
            </p>
          </chap>
        </body>
      </text>
    </archimedes>
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