1bubbles, the greater they will grow, be
cauſe having the leſs weight and preſſure
upon them, the Expanſion of that Air
which makes them, can be the leſs reſiſted
by the preſſure of the incumbent Water
and Air; as ſeems probable from hence,
that upon the letting in a little external
Air, thoſe bubbles immediately ſhrink.
cauſe having the leſs weight and preſſure
upon them, the Expanſion of that Air
which makes them, can be the leſs reſiſted
by the preſſure of the incumbent Water
and Air; as ſeems probable from hence,
that upon the letting in a little external
Air, thoſe bubbles immediately ſhrink.
Experi
ment 22.
ment 22.
It may indeed, as we lately intimated,
be conjectur'd, that theſe bubbles pro
ceed not ſo much from any Air pre-exi
ſtent in the Water, and lurking in the
Pores of it, as from the more ſubtle parts
of the Water it ſelf; which by the expan
ſion allow'd them upon the diminiſh'd
preſſure of the ambient Bodies may gene
rate ſuch bubbles. And indeed, I am not
yet ſo well ſatisfied that bubbles may not
(at leaſt ſometimes) have ſuch an Origina
tion: but that which makes me ſuſpect
that thoſe in our tryals contain'd real Air
formerly latitant in the Pores of the Wa
ter, is this, That upon the inletting of
the external Air, the Water was not
again impell'd to the very top of the
Tube whence it began to fall, but was
ſtopt in its aſcent near an Inch beneath
the top. And ſince, if the upper part of
the Tube had been devoyd of any other
be conjectur'd, that theſe bubbles pro
ceed not ſo much from any Air pre-exi
ſtent in the Water, and lurking in the
Pores of it, as from the more ſubtle parts
of the Water it ſelf; which by the expan
ſion allow'd them upon the diminiſh'd
preſſure of the ambient Bodies may gene
rate ſuch bubbles. And indeed, I am not
yet ſo well ſatisfied that bubbles may not
(at leaſt ſometimes) have ſuch an Origina
tion: but that which makes me ſuſpect
that thoſe in our tryals contain'd real Air
formerly latitant in the Pores of the Wa
ter, is this, That upon the inletting of
the external Air, the Water was not
again impell'd to the very top of the
Tube whence it began to fall, but was
ſtopt in its aſcent near an Inch beneath
the top. And ſince, if the upper part of
the Tube had been devoyd of any other
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