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

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              in the Viol ſhrinking into a very nar­
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              row compaſs, the Glaſs did, as we expe­
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              cted, fall down to the bottom of the
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              Jar. </s>
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              <s>But being deſirous before we proceed­
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              ed to any new. </s>
              <s>Experiment, to try once
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              more whether the little Glaſs that had
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              the weight in it might not alſo be raiſ'd.
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              <s>After we had ſuffer'd the Engine to re­
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              main cloſ'd as it was, for five or ſix
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              hours, the Pump was again ply'd with
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              ſo much obſtinacy, that not onely a­
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              bout the upper part of the Jar there ap­
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              pear'd a good number of bubbles (but
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              very much ſmaller then thoſe we ſaw
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              the firſt time) but afterwards there
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              came from the bottom of the Jar, bub­
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              bles about the bigneſs of ſmal Peas: which
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              the Pump being ſtill kept going, fol­
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              low'd one another, to the number of forty,
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              coming from the ſtopp'd Violl; whoſe
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              mouth, it ſeems, had not been ſhut ſo
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              ſtrongly and cloſely, but that the included
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              Air, dilating it ſelf by its own ſpring, made
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              itſelf ſome little paſſage betwixt the Wall
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              and the Glaſs, and got away in theſe bub­
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              bles; after which, the unſtopp'd Glaſs be­
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              gan to float again, the Air ſhut up in it </s>
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