1ſtrong. Then having moderately empty
ed the Receiver, and taken it out of the
Pump, we ſpeedily applyed to the Ori
fice of the bottom of it the Neck of the
newly mention'd Glaſs, carefully ſtopping
the Crannys with melted Plaiſter, that no
Air might get in at them: And after
turning the Key of the Stop-cock, we
made a free paſſage for the Air to paſs out
of the bubble into the Receiver: which it
did with great celerity, leaving the bub
ble as empty as the Receiver it ſelf; as ap
pear'd to us by ſome Circumſtances not
now to be inſiſted on. Notwithſtanding
all which, the Veſſel, continuing as intire
as before, gave us cauſe to wonder that
the bare Roundneſs of the Figure ſhould
inable a Glaſs, almoſt as thin as Paper, to
reſiſt ſo great a preſſure as that of the
whole incumbent Atmoſphere. And ha
ving reiterated the Experiment, we found
again that the preſſure of the ambient
Body, thruſting all the parts inwards,
made them, by reaſon of their arched Fi
gure, ſo ſupport one another, that the
Glaſs remain'd as whole as at firſt.
ed the Receiver, and taken it out of the
Pump, we ſpeedily applyed to the Ori
fice of the bottom of it the Neck of the
newly mention'd Glaſs, carefully ſtopping
the Crannys with melted Plaiſter, that no
Air might get in at them: And after
turning the Key of the Stop-cock, we
made a free paſſage for the Air to paſs out
of the bubble into the Receiver: which it
did with great celerity, leaving the bub
ble as empty as the Receiver it ſelf; as ap
pear'd to us by ſome Circumſtances not
now to be inſiſted on. Notwithſtanding
all which, the Veſſel, continuing as intire
as before, gave us cauſe to wonder that
the bare Roundneſs of the Figure ſhould
inable a Glaſs, almoſt as thin as Paper, to
reſiſt ſo great a preſſure as that of the
whole incumbent Atmoſphere. And ha
ving reiterated the Experiment, we found
again that the preſſure of the ambient
Body, thruſting all the parts inwards,
made them, by reaſon of their arched Fi
gure, ſo ſupport one another, that the
Glaſs remain'd as whole as at firſt.
Now that the Figure of the Glaſs is
of great moment in this matter, may be
evinced by this other Experiment.
of great moment in this matter, may be
evinced by this other Experiment.