Boyle, Robert
,
New experiments physico-mechanicall, touching the spring of the air and its effects
,
1660
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up at the neck: This done, and the Air
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being in ſome meaſure ſuck'd out of the
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Pneumatical Glaſs (if I may ſo call it)
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the Bladder, mention'd at the beginning
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of our Experiment, appear'd extended e
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very way to its full Dimenſions; whereas
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neither of the two others did remarkably
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ſwell, and that whoſe neck was not ty'd
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ſeem'd very little, if at all leſs wrinkl'd
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then when it was put in. </
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>We made likewiſe a ſtrong Ligature a
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bout the middle of a long Bladder part
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ly empty'd, and upon the drawing the
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Air out of the Receiver, could obſerve
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no ſuch ſwelling betwixt the Ligature and
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the Neck of the Bladder, which had been
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purpoſely left open, as betwixt the ſame
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Ligature and the bottom of the Bladder,
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whence the included Air could no way
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get out. </
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>But a further and ſufficient manifeſtati
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on whence the intumeſſence of the Blad
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der proceeds, may be deduc'd from the
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following Experiment. </
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>TO try then at once both what it was
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that expanded the Bladder, and what
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a powerful Spring there is ev'n in the Air </
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