Boyle, Robert
,
New experiments physico-mechanicall, touching the spring of the air and its effects
,
1660
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the Glaſs was weaken'd) the Impriſon'd
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Air began to ſwell in the Bladder, and as
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more and more of the Air in the Recei
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ver was, from time to time, drawn out; ſo
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did that in the Bladder more and more ex
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pand it ſelf, and diſplay the folds of the
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formerly flaccid Bladder: ſo that before we
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had exhauſted the Receiver near ſo much
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as we could, the Bladder appear'd as full
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and ſtretched, as if it had been blown up
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with a Quill. </
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>And that it may appear that this plump
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neſs of the Bladder proceeded from the
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ſurmounting of the debilitated Spring of
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the ambient Air remaining in the Veſſel,
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by the ſtronger Spring of the Air remain
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ing in the Bladder; we Return'd the Key
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of the Stop-cock, and by degrees allow'd
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the external Air to return into the Recei
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ver: Whereupon it happen'd, as was ex
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pected, that as the Air came in from with
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out, the diſturb'd Air in the Bladder, was
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proportionably compreſſ'd into a narrow
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er room, and the ſides of the Bladder
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grew flaccid, till the Receiver having re
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admitted its wonted quantity of Air, the
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Bladder appear'd as full of wrinkles and
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cavities as before. </
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