Agricola, Georgius, De re metallica, 1912/1950

Table of figures

< >
[Figure 201]
Page: 384
[Figure 202]
Page: 385
[Figure 203]
Page: 386
[Figure 204]
Page: 387
[Figure 205]
Page: 388
[Figure 206]
Page: 389
[Figure 207]
Page: 390
[Figure 208]
Page: 395
[Figure 209]
Page: 396
[Figure 210]
Page: 397
[Figure 211]
Page: 399
[Figure 212]
Page: 403
[Figure 213]
Page: 406
[Figure 214]
Page: 408
[Figure 215]
Page: 410
[Figure 216]
Page: 411
[Figure 217]
Page: 412
[Figure 218]
Page: 413
[Figure 219]
Page: 415
[Figure 220]
Page: 421
[Figure 221]
Page: 423
[Figure 222]
Page: 425
[Figure 223]
Page: 427
[Figure 224]
Page: 431
[Figure 225]
Page: 433
[Figure 226]
Page: 453
[Figure 227]
Page: 455
[Figure 228]
Page: 456
[Figure 229]
Page: 457
[Figure 230]
Page: 460
< >
page |< < of 679 > >|
    <archimedes>
      <text>
        <body>
          <chap>
            <pb pagenum="229"/>
            <figure number="132"/>
            <p type="caption">
              <s>A—SCORIFIER. B—TRIANGULAR CRUCIBLE. C—CUPEL.
                <lb/>
              fat from the ashes, still the cupels which are made from such ashes are not
                <lb/>
              very good because they often contain charcoal dust, sand, and pebbles.
                <lb/>
              </s>
              <s>Some make them in the same way out of any kind of ashes, but first of all
                <lb/>
              pour water into the ashes and remove the scum which floats thereon; then,
                <lb/>
              after it has become clear, they pour away the water, and dry the ashes; they
                <lb/>
              then sift them and make the cupels from them. </s>
              <s>These, indeed, are good,
                <lb/>
              but not of the best quality, because ashes of this kind are also not devoid of
                <lb/>
              small pebbles and sand. </s>
              <s>To enable cupels of the best quality to be made, all
                <lb/>
              the impurities must be removed from the ashes. </s>
              <s>These impurities are of
                <lb/>
              two kinds; the one sort light, to which class belong charcoal dust and fatty
                <lb/>
              material and other things which float in water, the other sort heavy, such
                <lb/>
              as small stones, fine sand, and any other materials which settle in the
                <lb/>
              bottom of a vessel. </s>
              <s>Therefore, first of all, water should be poured into the
                <lb/>
              ashes and the light impurities removed; then the ashes should be
                <lb/>
              kneaded with the hands, so that they will become properly mixed with
                <lb/>
              the water. </s>
              <s>When the water has become muddy and turbid, it should be
                <lb/>
              poured into a second vessel. </s>
              <s>In this way the small stones and fine sand, or
                <lb/>
              any other heavy substance which may be there, remain in the first vessel,
                <lb/>
              and should be thrown away. </s>
              <s>When all the ashes have settled in this second
                <lb/>
              vessel, which will be shown if the water has become clear and does not taste
                <lb/>
              of the flavour of lye, the water should be thrown away, and the ashes
                <lb/>
              which have settled in the vessel should be dried in the sun or in a furnace.
                <lb/>
              </s>
              <s>This material is suitable for the cupels, especially if it is the ash of beech
                <lb/>
              wood or other wood which has a small annual growth; those ashes made
                <lb/>
              from twigs and limbs of vines, which have rapid annual growth, are not so </s>
            </p>
          </chap>
        </body>
      </text>
    </archimedes>
Impressum