1nother time, when the Valve had but lit
tle weight hanging at it, being, by I know
not what accident, drawn down beneath its
former place, it was by the impetuous
current of the outward Air ſuddenly im
pell'd up into it again, and kept there.
But in the former Experiment it is re
markable, That though the Receiver were
not well exhauſted, and though it leak'd
whil'ſt the reſt of the Experiment was in
proſecution, and though the Valve
whereon the Cylinder of the Atmoſphere
could preſs, were not above an Inch and
a half in Diameter, yet the weight kept
up by ſuction, or rather ſupported by the
Air, namely the Valve, the Seal and
what was caſt into it, being ſent to be
weigh'd, amounted to about ten of our
common Pounds, conſiſting of ſixteen
Ounces apiece: So that we doubted not
but that, had the Experiment been made
with favorable Circumſtances, the Air
endeavoring to preſs in at the Orifice of
the Stop-cock, would have kept a very
much greater weight from falling out of
it; I ſay the Air, becauſe we found, by
tryal purpoſely made, that neither the
imperfect contact of the Valve and the
Stop-cock, nor the Diachylon that was
tle weight hanging at it, being, by I know
not what accident, drawn down beneath its
former place, it was by the impetuous
current of the outward Air ſuddenly im
pell'd up into it again, and kept there.
But in the former Experiment it is re
markable, That though the Receiver were
not well exhauſted, and though it leak'd
whil'ſt the reſt of the Experiment was in
proſecution, and though the Valve
whereon the Cylinder of the Atmoſphere
could preſs, were not above an Inch and
a half in Diameter, yet the weight kept
up by ſuction, or rather ſupported by the
Air, namely the Valve, the Seal and
what was caſt into it, being ſent to be
weigh'd, amounted to about ten of our
common Pounds, conſiſting of ſixteen
Ounces apiece: So that we doubted not
but that, had the Experiment been made
with favorable Circumſtances, the Air
endeavoring to preſs in at the Orifice of
the Stop-cock, would have kept a very
much greater weight from falling out of
it; I ſay the Air, becauſe we found, by
tryal purpoſely made, that neither the
imperfect contact of the Valve and the
Stop-cock, nor the Diachylon that was