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="013/01/313.jpg" pagenum="283"/>
              Pipes and
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              Siphons
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              formerly mention'd,
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              but will return to our Bubble; and take
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              notice, That we thought fit alſo to en­
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              deavor to meaſure the capacity of the
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              Bubble we had made uſe of, by filling
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              it with Water, that we might the better
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              know how much Water anſwered in
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              weight to 3/4 of a Grain of Air, but not­
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              withſtanding all the diligence that was
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              uſed to preſerve ſo brittle a Veſſel, it
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              broke before we could perfect what we
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              were about, and we were not then pro­
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              vided of another Bubble fit for our
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              turn. </s>
            </p>
            <p type="main">
              <s>The haſte I was in, My Lord, when I
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              ſent away the laſt Sheet, made me forget
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              to take notice to you of a Problem that
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              occurr'd to my thoughts, upon the oc­
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              caſion of the ſlow breaking of the Glaſs
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              Bubble in our evacuated Receiver. </s>
              <s>For
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              it may ſeem ſtrange, ſince by our ſixth
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              Experiment it appears, that the Air, when
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              permitted, will by its own internal Spring
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              expand it ſelfe twice as much as
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              Mer­
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              ſennus
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              was able to expand it, by the
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              heat even of a candent
                <emph type="italics"/>
              Æolipile:
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              Yet
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              the
                <emph type="italics"/>
              Elater
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              of the Air was ſcarce able to
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              break a very thin Glaſs Bubble, and ut-</s>
            </p>
          </chap>
        </body>
      </text>
    </archimedes>
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