Agricola, Georgius, De re metallica, 1912/1950
page |< < of 679 > >|
    <archimedes>
      <text>
        <body>
          <chap>
            <pb pagenum="574"/>
            <figure number="292"/>
            <p type="caption">
              <s>A—TUNNEL. B—BUCKET. C—PIT.
                <lb/>
              In hot regions or in summer, it is poured into out-of-door pits which have
                <lb/>
              been dug to a certain depth, or else it is extracted from shafts by pumps
                <lb/>
              and poured into launders, through which it flows into the pits, where it is
                <lb/>
              condensed by the heat of the sun. </s>
              <s>In cold regions and in winter these vitriol
                <lb/>
              waters are boiled down with equal parts of fresh water in rectangular leaden
                <lb/>
              caldrons; then, when cold, the mixture is poured into vats or into tanks,
                <lb/>
              which Pliny calls wooden fish-tanks. </s>
              <s>In these tanks light cross-beams are
                <lb/>
              fixed to the upper part, so that they may be stationary, and from them hang
                <lb/>
              ropes stretched with little stones; to these the contents of the thickened
                <lb/>
              solutions congeal and adhere in transparent cubes or seeds of vitriol, like
                <lb/>
              bunches of grapes.</s>
            </p>
          </chap>
        </body>
      </text>
    </archimedes>
Impressum