Now of this Experiment there are two
or three Circumſtances yet to be men
tion'd, which are no leſs then thoſe alrea
dy recited, pertinent to our preſent pur
poſe.
or three Circumſtances yet to be men
tion'd, which are no leſs then thoſe alrea
dy recited, pertinent to our preſent pur
poſe.
In the firſt place then, when the great
er part of the Air had been pump'd out of
the Receiver, the riſing bubbles aſcend
ed ſo very ſlowly in the Pipe, that their
Progreſs was ſcarce diſcernable; which
ſeem'd to proceed from this, That their
bigneſs was ſuch, That they could not
ſufficiently extend themſelves in the
cavity of the Glaſs, without preſſing
on both hands againſt the ſides of it,
whereby they became of more difficult
extruſion to the Water. And though it
may ſeem ſtrange theſe bubbles ſhould
be of any conſiderable bulk, ſince 'tis
like they conſiſted of leſſer parcels of
the Air lurking in the Water, then thoſe
that were vigorous enough to make their
way through long before them: yet they
were commonly much larger then before,
ſome of them being equal in quantity to
four or five Peas: Whether this their in
creaſe of bulk proceeded from the greater
decrement of the preſſure of the Air,
er part of the Air had been pump'd out of
the Receiver, the riſing bubbles aſcend
ed ſo very ſlowly in the Pipe, that their
Progreſs was ſcarce diſcernable; which
ſeem'd to proceed from this, That their
bigneſs was ſuch, That they could not
ſufficiently extend themſelves in the
cavity of the Glaſs, without preſſing
on both hands againſt the ſides of it,
whereby they became of more difficult
extruſion to the Water. And though it
may ſeem ſtrange theſe bubbles ſhould
be of any conſiderable bulk, ſince 'tis
like they conſiſted of leſſer parcels of
the Air lurking in the Water, then thoſe
that were vigorous enough to make their
way through long before them: yet they
were commonly much larger then before,
ſome of them being equal in quantity to
four or five Peas: Whether this their in
creaſe of bulk proceeded from the greater
decrement of the preſſure of the Air,