to po&longs;&longs;e&longs;s as much of the Cavity of the <lb/>
Che&longs;t as the Lungs fill not up, being much <lb/>
weaken'd, the external and contiguous <lb/>
Air mu&longs;t nece&longs;&longs;arily pre&longs;s in at the open <lb/>
Winde-Pipe into the Lungs, as finding <lb/>
there le&longs;s re&longs;i&longs;tance then any where el&longs;e a<lb/>
bout it. </s></p>

<p type="main"> <s>And hence (by the way) we may derive <lb/>
a new a&longs;&longs;i&longs;tance to judge of that famous <lb/>
Controver&longs;ie di&longs;puted among Naturali&longs;ts <lb/>
and Phy&longs;itians, ever &longs;ince <emph type="italics"/>Galens<emph.end type="italics"/> time, <lb/>
&longs;ome maintaining that the Che&longs;t, with the <lb/>
contained Lungs, may be re&longs;embled to a <lb/>
pair of Bellows, which comes therefore <lb/>
to be fill'd becau&longs;e it was dilated: And o<lb/>
thers pleading to have the compari&longs;on <lb/>
made to a Bladder, which is therefore di<lb/>
lated becau&longs;e it is fill'd. </s> <s>For as to the <lb/>
<emph type="italics"/>Thorax,<emph.end type="italics"/> it &longs;eems evident from what has <lb/>
been lately &longs;aid, that it, like a pair of Bel<lb/>
lows, happens to be partly fill'd with Air, <lb/>
but becau&longs;e it was dilated: But as for the <lb/>
Lungs them&longs;elves, who want Fibres to <lb/>
di&longs;tend them, they may fitly enough be <lb/>
compar'd to a Bladder; &longs;ince they are di<lb/>
lated by being fill'd, namely, by that Air <lb/>
which ru&longs;hes into them upon the dilatation <lb/>
of the Che&longs;t, in who&longs;e increa&longs;ed Cavity <lb/>
it findes (as we fre&longs;hly noted) le&longs;s re&longs;i&longs;t-