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

Table of figures

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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. </s>
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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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              <s>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 </s>
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