1which happen'd to be at hand, though it
were not ſo fit for our purpoſe as we
could have wiſhed, in regard it was three
or four times as big at one end as the o
ther. This Pipe which was thirty Inches
long, being Hermetically ſeal'd at the
ſlender end, was almoſt filled with Wa
ter; and after the above-related manner
a bubble was convey'd to the top of it,
and the open extream was put into a Viol
that had a little fair Water at the bottom:
Then the Cover, by means of a ſmall hole
purpoſely made in it for the Glaſs Pipe to
ſtand out at, was cemented on to the Re
ceiver, and the Pump being ſet awork,
after ſome exſuctions, not onely the Air
manifeſtly appear'd extended below the
ſurface of the ſubjacent Water; but one
of the By-ſtanders affirms, that he ſaw
ſome bubbles come out at the bottom of
the Pipe and break through the Water
This done, we left off Pumping, and ob
ſerv'd how at the unperceiv'd leaks of the
Receiver the Air got in ſo faſt, thatit
very quickly impell'd up the Water to
the top of the Tube, excepting a little
ſpace whereinto that bubble was repulſ'd,
which had ſo lately poſſeſſ'd the whole
Tube; this Air at the ſlender end ap-
were not ſo fit for our purpoſe as we
could have wiſhed, in regard it was three
or four times as big at one end as the o
ther. This Pipe which was thirty Inches
long, being Hermetically ſeal'd at the
ſlender end, was almoſt filled with Wa
ter; and after the above-related manner
a bubble was convey'd to the top of it,
and the open extream was put into a Viol
that had a little fair Water at the bottom:
Then the Cover, by means of a ſmall hole
purpoſely made in it for the Glaſs Pipe to
ſtand out at, was cemented on to the Re
ceiver, and the Pump being ſet awork,
after ſome exſuctions, not onely the Air
manifeſtly appear'd extended below the
ſurface of the ſubjacent Water; but one
of the By-ſtanders affirms, that he ſaw
ſome bubbles come out at the bottom of
the Pipe and break through the Water
This done, we left off Pumping, and ob
ſerv'd how at the unperceiv'd leaks of the
Receiver the Air got in ſo faſt, thatit
very quickly impell'd up the Water to
the top of the Tube, excepting a little
ſpace whereinto that bubble was repulſ'd,
which had ſo lately poſſeſſ'd the whole
Tube; this Air at the ſlender end ap-
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