Agricola, Georgius, De re metallica, 1912/1950

Table of figures

< >
[Figure 131]
Page: 266
[Figure 132]
Page: 267
[Figure 133]
Page: 269
[Figure 134]
Page: 278
[Figure 135]
Page: 278
[Figure 136]
Page: 279
[Figure 137]
Page: 288
[Figure 138]
Page: 293
[Figure 139]
Page: 300
[Figure 140]
Page: 303
[Figure 141]
Page: 304
[Figure 142]
Page: 306
[Figure 143]
Page: 307
[Figure 144]
Page: 308
[Figure 145]
Page: 309
[Figure 146]
Page: 310
[Figure 147]
Page: 312
[Figure 148]
Page: 313
[Figure 149]
Page: 314
[Figure 150]
Page: 315
[Figure 151]
Page: 316
[Figure 152]
Page: 322
[Figure 153]
Page: 323
[Figure 154]
Page: 324
[Figure 155]
Page: 325
[Figure 156]
Page: 326
[Figure 157]
Page: 327
[Figure 158]
Page: 329
[Figure 159]
Page: 330
[Figure 160]
Page: 331
< >
page |< < of 679 > >|
    <archimedes>
      <text>
        <body>
          <chap>
            <p type="caption">
              <s>
                <pb pagenum="270"/>
              These pieces of metal are afterward heated in iron basins and smelted in the
                <lb/>
              cupellation furnace by the smelters.</s>
            </p>
            <p type="main">
              <s>Although the miners, in the shafts or tunnels, have sorted over the
                <lb/>
              material which they mine, still the ore which has been broken down and carried
                <lb/>
              out must be broken into pieces by a hammer or minutely crushed, so that
                <lb/>
              the more valuable and better parts can be distinguished from the inferior and
                <lb/>
              worthless portions. </s>
              <s>This is of the greatest importance in smelting ore, for
                <lb/>
              if the ore is smelted without this separation, the valuable part frequently
                <lb/>
              receives great damage before the worthless part melts in the fire, or else the
                <lb/>
              one consumes the other; this latter difficulty can, however, be partly
                <lb/>
              avoided by the exercise of care and partly by the use of fluxes. </s>
              <s>Now, if a
                <lb/>
              vein is of poor quality, the better portions which have been broken down and
                <lb/>
              carried out should be thrown together in one place, and the inferior portion
                <lb/>
              and the rock thrown away. </s>
              <s>The sorters place a hard broad stone on a table;
                <lb/>
              the tables are generally four feet square and made of joined planks, and to
                <lb/>
              the edge of the sides and back are fixed upright planks, which rise about a
                <lb/>
              foot from the table; the front, where the sorter sits, is left open. </s>
              <s>The </s>
            </p>
            <figure number="144"/>
            <p type="caption">
              <s>A—TABLES. B—UPRIGHT PLANKS. C—HAMMER. D—QUADRANGULAR HAMMER.
                <lb/>
              E—DEEPER VESSEL. F—SHALLOWER VESSEL. G—IRON ROD.</s>
            </p>
          </chap>
        </body>
      </text>
    </archimedes>
Impressum