Boyle, Robert, New experiments physico-mechanicall, touching the spring of the air and its effects, 1660

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              <s>
                <pb xlink:href="013/01/085.jpg" pagenum="45"/>
              down the Sucker, would finde the reſiſt­
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              ance of the external Air increaſ'd as he
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              draws it lower, more of the diſplaced Air
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              being thruſt into it to compreſs it. </s>
              <s>But, by
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              what has been diſcourſ'd upon the firſt
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              Experiment, it ſeems more probable, that
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              without any ſuch ſtrengthning of the preſ­
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              ſure of the outward Air, the taking quite
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              away or the debilitating of the reſiſtance
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              from within, may ſuffice to produce the
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              effects under conſideration. </s>
              <s>But this will
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              perhaps be illuſtrated by ſome or other of
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              our future Experiments, and therefore
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              ſhall be no longer inſiſted on here. </s>
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            <p type="margin">
              <s>
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                <emph type="italics"/>
              Experi­
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              ment
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              3.</s>
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              <s>HAving thus taken notice of ſome of
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              the conſtant
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              Phænomena
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              of our En­
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              gine it ſelf, let us now proceed to the Ex­
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              periments tryable in it. </s>
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              <s>
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                <emph type="italics"/>
              Experi­
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              ment
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              4.</s>
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            <p type="main">
              <s>We took then a Lambs Bladder large,
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              well dry'd, and very limber, and leaving in
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              it about half as much Air as it could con­
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              tain, we cauſ'd the neck of it to be ſtrong­
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              ly ty'd, ſo that none of the included Air,
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              though by preſſure, could get out. </s>
              <s>This
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              Bladder being convey'd into the Receiver,
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              and the Cover luted on, the Pump
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              was ſet awork, and after two or three
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              exſuctions of the ambient Air (where­
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              by the Spring of that which remain'd in </s>
            </p>
          </chap>
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