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

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              <s>
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              then ſuch Ethereal matter as was ſubtle
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              enough freely to penetrate the pores of
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              the Glaſs, the external Air would have
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              been able to impel the Water to the top
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              of a Tube ſeven or eight times as long as
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              ours was; The
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              Phænomenon
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              under conſi­
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              deration ſeem'd manifeſtly to argue that
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              the many bubbles that broke at the top
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              of the Water did contain a real Air,
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              which, being collected into one place and
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              hinder'd by the top of the Glaſs from re­
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              ceding, was able to withſtand the preſſure
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              of the outward Air. </s>
              <s>As we ſee that if
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              never ſo little Air remain in the Tube up­
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              on the making the Experiment
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              De Vacuo
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              with Quick-ſilver, no inclining of the
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              Tube, though a long one, will enable a
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              Man to impel the Mercury up to the very
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              top, by reaſon (as we formerly noted)
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              of the reſiſtance of the included Air, which
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              will not be compreſſ'd beyond a certain
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              degree. </s>
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              <s>But in order to a further Diſcovery what
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              our bubbles were, we will, on this occa­
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              ſion, inform Your Lordſhip that we try'd
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              the XIX
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              th
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              Experiment
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              in one of our ſmall
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              Receivers, and ſound, that upon the draw­
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              ing down of the Water, ſo many bubbles
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              diſcloſ'd themſelves and broke into the </s>
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