Agricola, Georgius, De re metallica, 1912/1950

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    <archimedes>
      <text>
        <body>
          <chap>
            <p type="caption">
              <s>
                <pb pagenum="515"/>
              which turn five brass wheels, four of which are small, and the fifth much
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              larger than the rest. </s>
              <s>The notches in which the small wheels turn are two
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              palms long and as much as a palm wide; those wheels are a palm wide and
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              a palm and two digits in diameter; four of the notches are near the four
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              corners of the trolley; the fifth notch is between the two front ones, and
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              it is two palms back from the front. </s>
              <s>Its pulley is larger than the rest, and
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              turns in its own notch; it is three palms in diameter and one palm wide,
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              and grooved on the circumference, so that the iron chain may run in the
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              groove. </s>
              <s>The trolley has two small axles, to the one in front are fastened
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              three, and to the one at the back, the two wheels; two wheels run on the
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              one beam of the crane-arm, and two on the other; the fifth wheel, which is
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              larger than the others, runs between those two beams. </s>
              <s>Those people who
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              have no cranes place the cakes on a triangular board, to which iron cleats
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              are affixed, so that it will last longer; the board has three iron chains,
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              which are fixed in an iron ring at the top; two workmen pass a pole through
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              the ring and carry it on their shoulders, and thus take the cake to the furnace
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              in which silver is separated from copper.</s>
            </p>
            <p type="main">
              <s>From the vicinity of the furnaces in which copper is mixed with lead and
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              the “slags” are re-melted, to the third long wall, are likewise ten furnaces,
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              in which silver mixed with lead is separated from copper. </s>
              <s>If this space is
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              eighty feet and two palms long, and the third long wall has in the centre a
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              door three feet and two palms wide, then the spaces remaining at either side
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              of the door will be thirty-eight feet and two palms; and if each of the furnaces
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              occupies four feet and a palm, then the interval between each furnace and
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              the next one must be a foot and three palms; thus the width of the five
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              furnaces and four interspaces will be twenty-eight feet and a palm. </s>
              <s>There­
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              fore, there remain ten feet and a palm, which measurement is so divided
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              that there are five feet and two digits between the first furnace and
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              the transverse wall, and as many feet and digits between the fifth furnace
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              and the door; similarly in the other part of the space from the door to the
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              sixth furnace, there must be five feet and two digits, and from the tenth
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              furnace to the seventh transverse wall, likewise, five feet and two digits.
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              </s>
              <s>The door is six feet and two palms high; through it the foreman of the
                <emph type="italics"/>
              officína
                <emph.end type="italics"/>
                <lb/>
              and the workmen enter the store-room in which the silver-lead alloy is kept.</s>
            </p>
            <p type="main">
              <s>Each furnace has a bed, a hearth, a rear wall, two sides and a front,
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              and a receiving-pit. </s>
              <s>The bed consists of two sole-stones, four rectangular
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              stones, and two copper plates; the sole-stones are five feet and a palm
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              long, a cubit wide, a foot and a palm thick, and they are sunk into the ground,
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              so that they emerge a palm and two digits; they are distant from each other
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              about three palms, yet the distance is narrower at the back than the front.
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              </s>
              <s>Each of the rectangular stones is two feet and as many palms long, a cubit
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              wide, and a cubit thick at the outer edge, and a foot and a palm thick on the
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              inner edge which faces the hearth, thus they form an incline, so that there is a
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              slope to the copper plates which are laid upon them. </s>
              <s>Two of these rectang­
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              ular stones are placed on one sole-stone; a hole is cut in the upper edge of
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              each, and into the holes are placed iron clamps, and lead is poured in; they </s>
            </p>
          </chap>
        </body>
      </text>
    </archimedes>
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