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

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    <archimedes>
      <text>
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            <p type="main">
              <s>
                <pb xlink:href="013/01/309.jpg" pagenum="279"/>
              ſubtle then Air, proceeded partly from
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              the looſer Texture of that particular
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              parcel of Glaſs the Receiver was made
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              of (for Experience has taught us, that
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              all Glaſs is not of the ſame compact­
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              neſs and ſolidity) and partly from the
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              enormous heat, which, together with
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              the vehement agitation of the pene­
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              trant Spirits, open'd the Pores of the
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              Glaſs; then to imagine that ſuch a
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              ſubſtance as Air, ſhould be able to per­
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              meate the Body of Glaſs contrary to
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              the teſtimony of a thouſand Chymical
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              and Mechanical Experiments, and of
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              many of thoſe made in our Engine, e­
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              ſpecially that newly recited: Nay, by
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              our fifth Experiment it appears, that
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              a thin Bladder will not at its Pores
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              give paſſage even to rarified Air. </s>
              <s>And
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              on this occaſion we will annex an Ex­
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              periment, which has made ſome of
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              thoſe we have acquainted with it,
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              doubt, whether the Corpuſcles of the
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              Air be not leſſe ſubtle then thoſe of
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              Water. </s>
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            <p type="main">
              <s>But without examining here the
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              reaſonableneſſe of that doubt, we will
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              proceed to recite the Experiment it ſelf,
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              which ſeems to teach, That though Air, </s>
            </p>
          </chap>
        </body>
      </text>
    </archimedes>
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