Agricola, Georgius, De re metallica, 1912/1950

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    <archimedes>
      <text>
        <body>
          <chap>
            <p type="main">
              <s>
                <pb pagenum="477"/>
              that the one fits in a mortise in the middle of the other, and the other likewise
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              fits in the mortise of the first, thus making a kind of a cross; these sills are
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              three feet long and one foot wide and thick. </s>
              <s>The crane-post is round at its
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              upper end and is cut down to a depth of three palms, and turns in a band
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              fastened at each end to a roof-beam, from which springs the inclined chimney
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              wall. </s>
              <s>To the crane-post is affixed a frame, which is made in this way: first, at a
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              height of a cubit from the bottom, is mortised into the crane-post a small
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              cross-beam, a cubit and three digits long, except its tenons, and two palms in
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              width and thickness. </s>
              <s>Then again, at a height of five feet above it, is another
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              small cross-beam of equal length, width, and thickness, mortised into the
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              crane-post. </s>
              <s>The other ends of these two small cross-beams are mortised
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              into an upright timber, six feet three palms long, and three-quarters wide
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              and thick; the mortise is transfixed by wooden pegs. </s>
              <s>Above, at a height of
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              three palms from the lower small cross-beam, are two bars, one foot one palm
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              long, not including the tenons, a palm three digits wide, and a palm thick,
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              which are mortised in the other sides of the crane-post. </s>
              <s>In the same manner,
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              under the upper small cross-beam are two bars of the same size. </s>
              <s>Also in the
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              upright timber there are mortised the same number of bars, of the same length
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              as the preceding, but three digits thick, a palm two digits wide, the two
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              lower ones being above the lower small cross-beam. </s>
              <s>From the upright
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              timber near the upper small cross-beam, which at its other end is mortised
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              into the crane-post, are two mortised bars. </s>
              <s>On the outside of this frame,
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              boards are fixed to the small cross-beams, but the front and back parts of the
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              frame have doors, whose hinges are fastened to the boards which are fixed
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              to the bars that are mortised to the sides of the crane-post.</s>
            </p>
            <p type="main">
              <s>Then boards are laid upon the lower small cross-beam, and at a height
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              of two palms above these there is a small square iron axle, the sides of which
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              are two digits wide; both ends of it are round and turn in bronze or iron
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              bearings, one of these bearings being fastened in the crane-post, the other in
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              the upright timber. </s>
              <s>About each end of the small axle is a wooden disc, of three
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              palms and a digit radius and one palm thick, covered on the rim with an iron
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              band; these two discs are distant two palms and as many digits from each </s>
            </p>
          </chap>
        </body>
      </text>
    </archimedes>
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