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="013/01/230.jpg" pagenum="200"/>
              being manifeſtly ſo dilated as to expel a
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              good part of the Water, but not ſo much
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              as to break quite thorow. </s>
              <s>And at length,
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              when our expectation of it was almoſt ti­
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              red out, the heavier of the two Viols be­
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              gan to come aloft, and immediately to
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              ſubſide again, which appear'd to be oc­
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              caſion'd by the Air within it, whoſe bulk
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              and ſpring being weaken'd by the receſs
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              of the forty bubbles before-mention'd, it
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              was no longer able, as formerly, to break
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              forcibly through the incumbent Water;
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              but forming a bubble at the mouth of the
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              Glaſs, boyed it up towards the top, and
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              there getting away, left it to ſink again
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              till the preſſure of the Air in the Recei­
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              ver being further taken off, the Air in the
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              Viol was permitted to expand it ſelf fur­
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              ther, and to create another bubble, by
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              which it was again for a while carried up.
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              </s>
              <s>And it was remarkable, that though after
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              having emptyed the Receiver as far as
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              well we could, we ceaſ'd from pumping;
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              yet the Veſſel continuing more ſtanch
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              then it was wont, this aſcent and fall of
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              the Viol was repeated to the ninth time;
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              the included Air, by reaſon of the ſmal­
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              neſs of the vent at which it muſt paſs out,
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              being not able to get away otherwiſe then </s>
            </p>
          </chap>
        </body>
      </text>
    </archimedes>
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