Boyle, Robert, New experiments physico-mechanicall, touching the spring of the air and its effects, 1660

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1odde an Experiment as we have been Re­
lating, we will adde that for farther ſatiſ­
faction we reiterated it in a round Glaſſe
containing by gueſſe about ſix ounces
of water: this violl we put into ſuch a
ſmall Receiver as was lately mention'd,
in ſuch manner as that the bottome of
it reſted upon the lower part of the Pneu­
maticall Glaſſe, and the Neck came out
through the Leaden-Cover of the ſame
at a hole made purpoſely for it.
But be­
ing made circumſpect by the foregoing
miſchance, we had put the violl into a
Bladder, before we put it into the Re­
ceiver to hinder this laſt named Glaſſe
from being endanger'd by the breaking
of the other.
Then the Pneumaticall
veſſell being clos'd ſo that no way was
left for the outward Air to get into it,
but by breaking through the Viol, into
whoſe cavity it had free acceſſe by the
mouth of it, (which was purpoſely left
open,) the Sucker being nimbly drawn
down, the external Air immediatly preſſ'd
forcibly as well upon the Leaden-Co­
ver as the Violl; and the Cover hap­
pening to be in one place a little narrow­
er then the edge of the Pneumatical Glaſs,
was depreſſ'd, and thruſt into it ſo vio-

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