Borelli, Giovanni Alfonso, De motionibus naturalibus a gravitate pendentibus, 1670

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                <pb pagenum="434" xlink:href="010/01/442.jpg"/>
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              ri, & currere poterit; quàm canis; licèt ergo
                <expan abbr="mediũ">medium</expan>
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              lutoſum debilem canem magis impediat, quàm robu­
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              ſtum equum, non tamen licet inferre quòd maior vis
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              motiua equi celeriorem motum producat in aere ab­
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              lato impedimento luti, quàm canis, cùm æquè velo­
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              ces ſupponantur. </s>
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              Cap. 10. de
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              æquitempo­
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              ranea natu­
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              rali veloci­
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              tate
                <expan abbr="grauiũ">grauium</expan>
              .</s>
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            <p type="main">
              <s id="s.002255">Demùm notari debet quàm diuerſa ſit conſtitutio
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              duorum corporum grauium in
                <expan abbr="æqualiũ">æqualium</expan>
              in medio flui­
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              do magis, aut minùs denſo, & impediente quàm in
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              ſpatio prorsùs inani; namibi vt dictum eſt, graue vnà
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              cum medio fluido in quo immergitur, libram, quam­
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              dam, ſeù ſiphonem conſtituit, & ideò prout efficitur
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              æquilibrium, vel mobile ſuperat, vel deficit, à gra­
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              uitate fluidi ambientis effici poteſt quies, aut aſcen­
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              ſus, vel deſcenſus; at in medio prorsùs inani vbi im­
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              pedimentum æquilibrij prorsùs tollitur non poterit
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              vlla ratione vnica illa naturalis velocitas corporis
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              mobilis alterari, retardarique. </s>
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            <p type="margin">
              <s id="s.002256">
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              Pr. 9. & 10.</s>
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              <s id="s.002257">Ad quintum argumentum nego primo loco repe­
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              riri vllum corpus poſſe quod in aliquo medio fluido
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              pleno, licèt tenuiſſimo, & rariſſimo poſſit tanta velo­
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              citate moueri, quanta eſt illa, quam aliud corpus in
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              vacuo habere poſſet; nam vniuersè omnia corporą
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              terrena æquè velocia ſunt in ſpatio inani ablatis om­
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              nibus impedimentis, vt mox
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              , igitur quod­
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              libet eorum in medio pleno conſtitutum tardiori mo­
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              tu deſcendet, quàm quodlibet aliud in medio inani,
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              tantum præcisè, quantum medium prædictum
                <expan abbr="fluidũ">fluidum</expan>
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              ſua denſitate impedit eius naturalem motum, ergò </s>
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