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="013/01/264.jpg" pagenum="234"/>
              Stop-cock, there was ſpeedily apply'd a
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              tapering Valve of braſs, ſuch as is deſcrib'd
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              in the 9
                <emph type="sup"/>
              th
                <emph.end type="sup"/>
              fig: made fit to go with its nar­
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              rower end into the cavity of the branch,
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              and to fill the orifice of that cavity with
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              its broader part. </s>
              <s>And that the Air might
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              not get in at the litle intervals, left here
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              and there between the convex ſurface of
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              the ſtopple and the internall edge of the
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              branch, thoſe intervals were ſtop't with
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              a little Diachylon. </s>
              <s>And to the doore,
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              or, (if you pleaſe) that part of the Valve
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              which was to move to and fro, and in
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              this Experiment hung perpendicular to
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              the Horizon, there was, at a button of
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              braſs belonging to the Valve faſten'd a
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              broad ſcale wherein weights were to be
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              put. </s>
              <s>This done the key of the Stop-cock
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              was turn'd, and the externall Air beating
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              like a forcible ſtreame upon the Valve
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              to get in there, it did ſuddenly both ſhut
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              the Valve and keep it ſhut ſo ſtrongly,
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              that we had time to caſt in diverſe weights
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              one after another into the Scale; till at
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              length the weight overpowering the preſ­
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              ſure of the Atmoſphere, drew downe the
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              Valve by the ſtringes that ty'd the Scale
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              to it, and gave liberty to the outward Air
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              to ruſh into the Receiver. </s>
              <s>Though a-</s>
            </p>
          </chap>
        </body>
      </text>
    </archimedes>
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