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. </s>
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              <s>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. </s>
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              <s>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. </s>
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              <s>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 </s>
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