Agricola, Georgius, De re metallica, 1912/1950

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    <archimedes>
      <text>
        <body>
          <chap>
            <p type="main">
              <s>
                <pb pagenum="60"/>
              also are able to signify the intermediate directions by means of the names of
                <lb/>
              the winds. </s>
              <s>For instance, if a vein runs from VI east to VI west, it is said
                <lb/>
              to proceed from
                <emph type="italics"/>
              Subsolanus
                <emph.end type="italics"/>
              (east wind) to
                <emph type="italics"/>
              Favoníus
                <emph.end type="italics"/>
              (west wind); but one
                <lb/>
              which proceeds from between V and VI of the east to between V and VI
                <lb/>
              west is said to proceed out of the middle of
                <emph type="italics"/>
              Carbas
                <emph.end type="italics"/>
              and
                <emph type="italics"/>
              Subsolanus
                <emph.end type="italics"/>
              to between
                <lb/>
                <emph type="italics"/>
              Argestes
                <emph.end type="italics"/>
              and
                <emph type="italics"/>
              Favoníus;
                <emph.end type="italics"/>
              the remaining directions, and their intermediates
                <lb/>
              are similarly designated. </s>
              <s>The miner, on account of the natural properties
                <lb/>
              of a magnet, by which the needle points to the south, must fix the instru­
                <lb/>
              ment already described so that east is to the left and west to the right.</s>
            </p>
            <p type="main">
              <s>In a similar way to
                <emph type="italics"/>
              venae profundae,
                <emph.end type="italics"/>
              the
                <emph type="italics"/>
              venae dilatatae
                <emph.end type="italics"/>
              vary in their
                <lb/>
              lateral directions, and we are able to understand from the seams in the
                <lb/>
              rocks in which direction they extend into the ground. </s>
              <s>For if these incline
                <lb/>
              toward the west in depth, the vein is said to extend from east to west;
                <lb/>
              if on the contrary, they incline toward the east, the vein is said to go from
                <lb/>
              west to east. </s>
              <s>In the same way, from the rock seams we can determine
                <lb/>
              veins running south and north, or the reverse, and likewise to the
                <lb/>
              subordinate directions and their intermediates.</s>
            </p>
            <figure number="21"/>
            <p type="caption">
              <s>A, B—
                <emph type="italics"/>
              Venae dilatatae.
                <emph.end type="italics"/>
              </s>
              <s> C—
                <emph type="italics"/>
              Seams in the Rocks.
                <emph.end type="italics"/>
              </s>
            </p>
            <p type="main">
              <s>Further, as regards the question of direction of a
                <emph type="italics"/>
              vena profunda,
                <emph.end type="italics"/>
              one
                <lb/>
              runs straight from one quarter of the earth to that quarter which is opposite,
                <lb/>
              while another one runs in a curve, in which case it may happen that a vein
                <lb/>
              proceeding from the east does not turn to the quarter opposite, which is the
                <lb/>
              west, but twists itself and turns to the south or the north.</s>
            </p>
          </chap>
        </body>
      </text>
    </archimedes>
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