Boyle, Robert
,
New experiments physico-mechanicall, touching the spring of the air and its effects
,
1660
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ſtopple may be lifted up without any dif
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ficulty at all. </
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>By ſeveral other of the Experiments
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afforded us by our Engine, the ſame no
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tion of the great and equal preſſure of the
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free Air upon the Bodies it environs,
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might be here manifeſted, but that we
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think it not ſo fit to anticipate ſuch Ex
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periments: And therefore ſhall rather
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employ a few lines to clear up a difficulty
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touching this matter, which we have ob
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ſerv'd to have troubled ſome even of the
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Philoſophical and Mathematical Specta
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tors of our Engine, who have wonder'd
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that we ſhould talk of the Air exquiſitely
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ſhut up in our Receiver, as if it were all
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one with the preſſure of the Atmoſphere;
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whereas the thick and cloſe body of the
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Glaſs, wholly impervious to the Air, does
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manifeſtly keep the incumbent Pillar of
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the Atmoſphere from preſſing in the leaſt
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upon the Air within the Glaſs, which it
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can no where come to touch. </
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>To eluci
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date a little this matter, let us conſider,
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That if a man ſhould take a fleece of
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Wool, and having firſt by compreſſing it
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in his hand reduc'd it into a narrower com
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paſs, ſhould nimbly convey and ſhut it
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cloſe up into a Box juſt fit for it, though </
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