Boyle, Robert
,
New experiments physico-mechanicall, touching the spring of the air and its effects
,
1660
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[Figure 9]
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[Figure 10]
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Body towards the left; whereby neither
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of them proves able to move it out of
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its place, the preſſure on all hands being
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reduced as it were to an
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Æquilibrium:
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ſo
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that the Corpuſcles of the Air muſt be as
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well ſometimes conſidered under the no
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tion of little Springs, which remaining
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bent, are in their entire bulk tranſported
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from place to place; as under the notion
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of Springs diſplaying themſelves, whoſe
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parts flie abroad whilſt as to their entire
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bulk they ſcarce change place: As the
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two ends of a Bow, ſhot off, fly from one
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another, whereas the Bow it ſelf may be
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held faſt in the Archers hand; and that it
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is the equal preſſure of the Air on all ſides
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upon the Bodies that are in it, which cau
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ſes the eaſie Ceſſion of its parts, may be
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argu'd from hence: That if by the help
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of our Engine the Air be but in great
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part, though not totally drawn away
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from one ſide of a Body without being
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drawn away from the other; he that ſhall
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think to move that Body too and fro, as
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eaſily as before, will finde himſelf much
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miſtaken. </
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In a Diſ
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courſe
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touching
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ſluidity
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and firm
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neſs.
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>In verification of which we will, to di
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vert your Lordſhip a little, mention here
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a
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Phænomenon
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of our Engine, which even </
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