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="013/01/289.jpg" pagenum="259"/>
              would make them loſe their
                <emph type="italics"/>
              Æquili­
                <lb/>
              brium.
                <emph.end type="italics"/>
              </s>
            </p>
            <p type="margin">
              <s>
                <margin.target id="marg43"/>
                <emph type="italics"/>
              Experi­
                <lb/>
              ment
                <emph.end type="italics"/>
              34.</s>
            </p>
            <p type="main">
              <s>But being deſirous at the ſame time to
                <lb/>
              make a tryal, for a certain Deſign that
                <lb/>
              needs not here be mention'd, we took
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              for one of our weights a dry Bladder,
                <lb/>
              ſtrongly tyed at the Neck, and about
                <lb/>
              half fill'd with Air (that being a weight
                <lb/>
              both ſlight, and that would expand it
                <lb/>
              ſelf in the evacuated Glaſs) and faſtning
                <lb/>
              that to one part of our formerly menti­
                <lb/>
              on'd exact ballance (which turns with the
                <lb/>
              32
                <emph type="sup"/>
              d
                <emph.end type="sup"/>
              part of a Grain) we put a Metalline
                <lb/>
              counterpoiſe into the oppoſite Scale; and
                <lb/>
              ſo the two weights being brought to an
                <lb/>
                <emph type="italics"/>
              Æquilibrium,
                <emph.end type="italics"/>
              the ballance was convey'd
                <lb/>
              into the Receiver, and ſuſpended from the
                <lb/>
              Cover of it. </s>
            </p>
            <p type="main">
              <s>But before we proceed further, we muſt
                <lb/>
              note, That preſently after the laying on
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              of the Cover, the Bladder appear'd to
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              preponderate, whereupon the Scales being
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              taken out, and reduc'd very near to an
                <emph type="italics"/>
              Æ­
                <lb/>
              quilibrium,
                <emph.end type="italics"/>
              yet ſo, that a little advantage
                <lb/>
              remain'd on that ſide to which the Metal­
                <lb/>
              line weight belong'd; they were again let
                <lb/>
              down into the Receiver, which was pre­
                <lb/>
              ſently made faſt with Plaiſter, and a hot
                <lb/>
              Iron: Soon after which, before the Pump </s>
            </p>
          </chap>
        </body>
      </text>
    </archimedes>
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