1that it may be well doubted whether the
obſervation, by reaſon of the great diffi
culty have been exactly made, there is a
manifeſt diſparity betwixt the Air and
Water: For I have not found, that upon
an Experiment purpoſely made, (and in
another Treatiſe Recorded) that Water
will ſuffer any conſiderable compreſſion;
whereas we may obſerve in Wind-Guns
(to mention now no other Engines) that
the Air will ſuffer it ſelf to be crouded in
to a comparatively very little room; in
ſo much, that a very diligent Examiner
of the Phænomena of Wind-Guns would
have us believe, that in one of them, by
condenſation, he reduc'd the Air into a
ſpace at leaſt eight times narrower then it
before poſſeſt. And to this, if we adde
a noble Phænomenon of the Experiment
De Vacuo; theſe things put together, may
for the preſent ſuffice to countenance our
Doctrine. For that noble Experimenter,
Monſieur Paſcal (the Son) had the com
mendable Curioſity to cauſe the Torri
cellian Experiment to be try'd at the foot,
about the middle, and at the top of that
high Mountain (in Auvergne, if I miſtake
not) commonly call'd Le Puy de Domme;
whereby it was found, That the Mercury
obſervation, by reaſon of the great diffi
culty have been exactly made, there is a
manifeſt diſparity betwixt the Air and
Water: For I have not found, that upon
an Experiment purpoſely made, (and in
another Treatiſe Recorded) that Water
will ſuffer any conſiderable compreſſion;
whereas we may obſerve in Wind-Guns
(to mention now no other Engines) that
the Air will ſuffer it ſelf to be crouded in
to a comparatively very little room; in
ſo much, that a very diligent Examiner
of the Phænomena of Wind-Guns would
have us believe, that in one of them, by
condenſation, he reduc'd the Air into a
ſpace at leaſt eight times narrower then it
before poſſeſt. And to this, if we adde
a noble Phænomenon of the Experiment
De Vacuo; theſe things put together, may
for the preſent ſuffice to countenance our
Doctrine. For that noble Experimenter,
Monſieur Paſcal (the Son) had the com
mendable Curioſity to cauſe the Torri
cellian Experiment to be try'd at the foot,
about the middle, and at the top of that
high Mountain (in Auvergne, if I miſtake
not) commonly call'd Le Puy de Domme;
whereby it was found, That the Mercury