Boyle, Robert, New experiments physico-mechanicall, touching the spring of the air and its effects, 1660

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    <archimedes>
      <text>
        <body>
          <chap>
            <p type="main">
              <s>
                <pb xlink:href="013/01/139.jpg" pagenum="109"/>
              of the ambient Atmoſphere upon the
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              incloſed Air; which hereby appears to
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              bear up on the Mercury, rather by virtue
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              of its ſpring, then of its weight: ſince its
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              weight cannot be ſuppoſ'd to amount to
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              above two or three Ounces, which is in­
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              conſiderable in compariſon of ſuch a Cy­
                <lb/>
              linder of Mercury as it would keep from
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              ſubſiding. </s>
            </p>
            <p type="main">
              <s>All things being thus in a readineſs, the
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              Sucker was drawn down; and, immedi­
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              ately upon the egreſs of a Cylinder of
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              Air out of the Receiver; the Quick-ſilver
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              in the Tube did, according to expectati­
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              on, ſubſide: and notice being carefully
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              taken (by a mark faſten'd to the outſide)
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              of the place where it ſtopt, we cauſ'd him
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              that manag'd the Pump to pump again,
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              and mark'd how low the Quick-ſilver fell
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              at the ſecond exſuction; but continuing
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              this work, we were quickly hindred from
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              accurately marking the Stages made by
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              the Mercury in its deſcent, becauſe it ſoon
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              ſunk below the top of the Receiver; ſo
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              that we could thenceforward mark it no
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              other ways then by the eye. </s>
              <s>And thus,
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              continuing the labor of pumping for a­
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              bout a quarter of an hour, we found our
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              ſelves unable to bring the Quick-ſilver in </s>
            </p>
          </chap>
        </body>
      </text>
    </archimedes>
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