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="013/01/169.jpg" pagenum="139"/>
              their way upwards. </s>
              <s>This, I ſay, is of
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              no great importance to our preſent Diſ­
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              courſe, ſince either way the Terreſtrial
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              Steam may here and there conſiderably
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              alter the gravity or preſſure of the At­
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              moſphere. </s>
            </p>
            <p type="main">
              <s>Your Lordſhip may alſo be pleaſed to
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              remember, That by our ſeventeenth Ex­
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              periment it appear'd that as when the Air
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              in the Receiver was expanded more then
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              ordinarily, the Quick-ſilver in the Tube
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              did proportionably ſubſide; ſo when the
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              Air in the ſame Receiver was a little more
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              then ordinarily compreſſ'd, it did impell
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              up the Quick-ſilver in the Tube above
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              the wonted height of betwixt ſix and ſe­
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              ven and twenty digits. </s>
            </p>
            <p type="main">
              <s>And if to theſe things we annex, that
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              for ought we can finde by tryals purpoſe­
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              ly made, the degree of rarity or denſity
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              of the Air, ſhut up into our Receiver, does
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              not ſenſibly alter its temperature as to
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              cold or heat. </s>
              <s>It will not, I hope, appear
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              abſurd to conceive, That ſince the Air,
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              included in the Tube, could but very faint­
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              ly hinder the aſcent of the Quick-ſilver,
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              or preſs it downwards, ſince too that inclu­
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              ded Air could ſcarce immediately receive
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              any ſenſible alteration, ſave either by heat </s>
            </p>
          </chap>
        </body>
      </text>
    </archimedes>
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