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

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              ſubſtance ſubtler then it ſelf, reſiding m­
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              it. </s>
              <s>In order to the ſatisfying my ſelf about
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              the firſt of theſe, I intended to let down
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              into the Receiver a Veſſel of Water,
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              wherein ſhould be immerſ'd a very ſmall
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              oyl'd Bladder, almoſt devoid of Air, but
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              ſtrongly ty'd up at the Neck with a ſtring,
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              and detain'd a little under Water by ſuch
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              a weight faſten'd to that ſtring, as ſhould
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              juſt be able to keep the Bladder from
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              ſwimming, and no more. </s>
              <s>For I ſuppoſ'd,
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              that if when all things were thus order'd,
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              the Receiver were empty'd, in caſe there
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              were any ſuch preſſure of the Atmoſphere
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              upon Water, as I was inclin'd to believe,
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              the Air within the Bladder, being upon the
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              exſuction of the Air within the Receiver,
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              freed from that preſſure, and being preſſ'd
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              onely by the ſmall weight of the in­
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              cumbent Water, would conſiderably ex­
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              pand it ſelf; but whil'ſt we were prepa­
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              ring Bladders for this Experiment, there
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              occurr'd an eaſie way for the making at
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              once both the Diſcoveries I deſir'd. </s>
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              Experi­
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              ment
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              21.</s>
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              <s>We took then a Glaſs Viol, containing
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              by gheſs a pound and ſome ounces of
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              Water, this we fill'd top full, and then
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              we put into the Neck of it a Glaſs Pipe
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              a pretty deal bigger then a Gooſe Quill, </s>
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