Boyle, Robert
,
New experiments physico-mechanicall, touching the spring of the air and its effects
,
1660
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out of the Glaſs, there appear'd no bub
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bles in the Water, notwithſtanding the
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want of preſſure in the ambient Body. </
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>But to be ſure to reach the chief end of
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our Experiment, we made uſe of this o
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ther expedient: We cauſ'd a convenient
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quantity of Water to be put, and Her
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metically ſhut up into a Glaſs Egge, to
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whoſe long Neck (which was purpoſely
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made of an unequal thickneſs) was fa
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ſten'd to one end of a ſtring, whoſe o
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ther end was ty'd to the Cover of our
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Receiver, after the manner elſewhere men
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tion'd already: Then the Egge being
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convey'd into the Pneumatical Veſſel,
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and that being evacuated, we did, by
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turning the braſs Stopple formerly de
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ſcrib'd amongſt the parts of our En
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gine, ſo ſhorten the ſtring as to break the
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Glaſs; whereby liberty being given to
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the Air impriſon'd in the Egge, to paſs
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into the capacity of the Receiver, the ſud
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den receſs of the Air made the bubbles in
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a trice appear ſo numerous, and aſcend
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ſo ſwiftly in the Water, that their motion
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look'd like that of a violent ſhower of
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Rain; ſave that the bubbles did not, like
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the drops of Rain, tend downwards, but
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upwards, which made me reſemble this </
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