Agricola, Georgius, De re metallica, 1912/1950

Table of figures

< >
[Figure 171]
Page: 347
[Figure 172]
Page: 349
[Figure 173]
Page: 351
[Figure 174]
Page: 352
[Figure 175]
Page: 353
[Figure 176]
Page: 355
[Figure 177]
Page: 356
[Figure 178]
Page: 358
[Figure 179]
Page: 359
[Figure 180]
Page: 360
[Figure 181]
Page: 361
[Figure 182]
Page: 362
[Figure 183]
Page: 364
[Figure 184]
Page: 365
[Figure 185]
Page: 366
[Figure 186]
Page: 367
[Figure 187]
Page: 368
[Figure 188]
Page: 369
[Figure 189]
Page: 370
[Figure 190]
Page: 371
[Figure 191]
Page: 372
[Figure 192]
Page: 373
[Figure 193]
Page: 374
[Figure 194]
Page: 375
[Figure 195]
Page: 376
[Figure 196]
Page: 378
[Figure 197]
Page: 379
[Figure 198]
Page: 380
[Figure 199]
Page: 381
[Figure 200]
Page: 383
< >
page |< < of 679 > >|
    <archimedes>
      <text>
        <body>
          <chap>
            <pb pagenum="342"/>
            <figure number="198"/>
            <p type="caption">
              <s>A—SIEVE. B—TUB. C—WATER FLOWING OUT OF THE BOTTOM OF IT. D—STRAKE.
                <lb/>
              E—THREE-TOOTHED RAKE. F—WOODEN SCRUBBER.
                <lb/>
              earth or sand is found on the slopes of mountains or hills, or in the level fields
                <lb/>
              which are either devoid of streams or into which a stream cannot be diverted,
                <lb/>
              miners have lately begun to employ the following method of washing, even
                <lb/>
              in the winter months. </s>
              <s>An open box is constructed of planks, about six
                <lb/>
              feet long, three feet wide, and two feet and one palm deep. </s>
              <s>At the upper
                <lb/>
              end on the inside, an iron plate three feet long and wide is fixed, at a depth
                <lb/>
              of one foot and a half from the top; this plate is very full of holes, through
                <lb/>
              which tin-stone about the size of a pea can fall. </s>
              <s>A trough hewn from a tree
                <lb/>
              is placed under the box, and this trough is about twenty-four feet long and
                <lb/>
              three-quarters of a foot wide and deep; very often three cross-boards are
                <lb/>
              placed in it, dividing it off into compartments, each one of which is lower
                <lb/>
              than the next. </s>
              <s>The turbid waters discharge into a settling-pit.</s>
            </p>
            <p type="main">
              <s>The metalliferous material is sometimes found not very deep beneath
                <lb/>
              the surface of the earth, but sometimes so deep that it is necessary to drive
                <lb/>
              tunnels and sink shafts. </s>
              <s>It is transported to the washing-box in wheel­
                <lb/>
              barrows, and when the washers are about to begin they lay a small launder, </s>
            </p>
          </chap>
        </body>
      </text>
    </archimedes>
Impressum