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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              nother time, when the Valve had but lit­
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              tle weight hanging at it, being, by I know
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              not what accident, drawn down beneath its
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              former place, it was by the impetuous
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              current of the outward Air ſuddenly im­
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              pell'd up into it again, and kept there.
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              </s>
              <s>But in the former Experiment it is re­
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              markable, That though the Receiver were
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              not well exhauſted, and though it leak'd
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              whil'ſt the reſt of the Experiment was in
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              proſecution, and though the Valve
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              whereon the Cylinder of the Atmoſphere
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              could preſs, were not above an Inch and
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              a half in Diameter, yet the weight kept
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              up by ſuction, or rather ſupported by the
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              Air, namely the Valve, the Seal and
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              what was caſt into it, being ſent to be
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              weigh'd, amounted to about ten of our
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              common Pounds, conſiſting of ſixteen
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              Ounces apiece: So that we doubted not
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              but that, had the Experiment been made
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              with favorable Circumſtances, the Air
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              endeavoring to preſs in at the Orifice of
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              the Stop-cock, would have kept a very
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              much greater weight from falling out of
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              it; I ſay the Air, becauſe we found, by
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              tryal purpoſely made, that neither the
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              imperfect contact of the Valve and the
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              Stop-cock, nor the Diachylon that was </s>
            </p>
          </chap>
        </body>
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