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

Table of figures

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              <s id="s.002680">
                <pb pagenum="505" xlink:href="010/01/513.jpg"/>
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              ſed etiam nullius roboris, quia licet in motu circu­
                <lb/>
              lari Rotæ ſolidæ
                <expan abbr="nõ">non</expan>
              appareat neceſſitas vacui, nihilo­
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              minus præcipua difficultas eſt non de motu circula­
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              ri, ſed de motu directo, vel per lineas curuas irregu­
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              lares in fluido, in quo ſenſu non conſtat, neque de­
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              monſtratur partes fluidi excurrere intra alias poſſe,
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              abſque eo quod mutuò ſe ſe confricent, inuertantur,
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              & inter ſe innumeras exiguas vacuitates admittant.
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              </s>
              <s id="s.002681">imò in poſtrema parte huius capitis oſtendemus ne­
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              ceſſariam eſſe vacui admiſſionem, ad hoc, vt fluidum,
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              vel
                <expan abbr="dẽſum">denſum</expan>
              corpus per fluidum moueri queat; ſed mo­
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              dò ſatis eſt oſtendiſſe non eſſe euidens, nec demon­
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              ſtratum fuiſſe, quod in motu facto in fluidis vacuum
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              neceſſario non exigatur. </s>
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            <p type="margin">
              <s id="s.002682">
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              Cap. 12. dę
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              vacui neceſ­
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              ſitate.</s>
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            <p type="main">
              <s id="s.002683">Secundò,
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              Vacuum non eſt cauſa motus, ſed Natura, ergo
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              vacuum non datur.
                <emph.end type="italics"/>
              </s>
              <s id="s.002684"> Cui reſponderi poteſt, neminem,
                <lb/>
              niſi planè delirum, ac ſtolidum, ſomniaſſe
                <expan abbr="vacuũ">vacuum</expan>
              , ſci­
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              licèt nihilum, cauſam poſitiuam
                <expan abbr="efficiẽtem">efficientem</expan>
              motus eſ­
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              ſe. </s>
              <s id="s.002685">Dixerunt certè Antiqui motum produci à natura,
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              ſiue à qualibet cauſa externa impulſiua, ſed requiri
                <lb/>
              vacuum veluti locus in quo motus fieri poſſit, igitur
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              Ariſtotelis
                <expan abbr="argumẽtum">argumentum</expan>
              nil officit vacui aſſertoribus. </s>
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            <p type="main">
              <s id="s.002686">Tertiò ait: quod
                <emph type="italics"/>
              accidit dicentibus vacuum eſſe neceſ-
                <emph.end type="italics"/>
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                <emph type="italics"/>
              ſarium, vt motus ſit contrarium potiùs, nam dato vacuo nil
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              in eo moueri poſſet, quia non eſt quo magis, aut minus mouea­
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              tur, quod namque vacuum eſt, caret omni differentia
                <emph.end type="italics"/>
              , ſcili­
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              cèt non habet ſursùm, neque deorsùm, nec ante, nec
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              retro, &c. </s>
              <s id="s.002687">Cui reſponderi poteſt, quod motus, quate­
                <lb/>
              nus talis eſt, dicit ſolummodò migrationem, & tran-</s>
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