Agricola, Georgius, De re metallica, 1912/1950

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    <archimedes>
      <text>
        <body>
          <chap>
            <pb pagenum="367"/>
            <p type="main">
              <s>Then twelve short posts are erected, whose lower ends are mortised into
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              the sill that is near the back of the furnace wall; these posts are two feet
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              high, exclusive of the tenons, and are three palms and the same number of
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              digits wide, and two palms thick. </s>
              <s>A slot one and a half palms wide is cut
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              through them, beginning two palms from the bottom and extending for a
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              height of three palms. </s>
              <s>All the posts are not placed at the same intervals, the
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              first being at a distance of three feet five digits from the second, and likewise
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              the third from the fourth, but the second is two feet one palm and three
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              digits from the third; the intervals between the other posts are arranged in
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              the same manner, equal and unequal, of which each four pertain to two
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              furnaces. </s>
              <s>The upper ends of these posts are mortised into a transverse
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              beam which is twelve feet, two palms, and three digits long, and projects
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              five digits beyond the first post and to the same distance beyond the fourth;
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              it is two palms and the same number of digits wide, and two palms thick.
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              </s>
              <s>Since each separate transverse beam supports four bellows, it is necessary to
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              have three of them.</s>
            </p>
            <p type="main">
              <s>Behind the twelve short posts the same number of higher posts are
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              erected, of which each has the middle part of the lower end cut out, so that
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              its two resulting lower ends are mortised into the back sill; these posts,
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              exclusive of the tenons, are twelve feet and two palms high, and are five palms
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              wide and two palms thick. </s>
              <s>They are cut out from the bottom upward, the
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              slot being four feet and five digits high and six digits wide. </s>
              <s>The upper ends of
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              these posts are mortised into a long beam imposed upon them; this long
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              beam is placed close under the timbers which extend from the wall at the
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              back of the furnace to the first long wall; the beam is three palms wide
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              and two palms thick, and forty-three feet long. </s>
              <s>If such a long one is
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              not at hand, two or three may be substituted for it, which when joined together
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              make up that length. </s>
              <s>These higher posts are not placed at equal distances,
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              but the first is at a distance of two feet three palms one digit from the second,
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              and the third is at the same distance from the fourth; while the second is at a
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              distance of one foot three palms and the same number of digits from the
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              third, and in the same manner the rest of the posts are arranged at equal
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              and unequal intervals. </s>
              <s>Moreover, there is in every post, where it faces the
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              shorter post, a mortise at a foot and a digit above the slot; in these mortises
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              of the four posts is tenoned a timber which itself has four mortises. </s>
              <s>Tenons
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              are enclosed in mortises in order that they may be better joined, and they
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              are transfixed with wooden pins. </s>
              <s>This timber is thirteen feet three palms
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              one digit long, and it projects beyond the first post a distance of two palms
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              and two digits, and to the same number of palms and digits beyond the
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              fourth post. </s>
              <s>It is two palms and as many digits wide, and also two palms
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              thick. </s>
              <s>As there are twelve posts it is necessary to have three timbers of this
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              kind.</s>
            </p>
            <p type="main">
              <s>On each of these timbers, and on each of the cross-beams which are laid
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              upon the shorter posts, are placed four planks, each nine feet long, two palms
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              three digits wide, and two palms one digit thick. </s>
              <s>The first plank is five feet
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              one palm one digit distant from the second, at the front as well as at the back. </s>
            </p>
          </chap>
        </body>
      </text>
    </archimedes>
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