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

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      <text>
        <body>
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            <p type="main">
              <s id="s.000387">
                <pb pagenum="82" xlink:href="010/01/090.jpg"/>
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                <lb/>
              prout plenum, & principium materiale deficeret,
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              aut abundaret in ipſis; & inſuper ait, quòd aſcenſus
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              ſursùm aliquorum corporum, nempè ignis,
                <expan abbr="nõ">non</expan>
              à prin­
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              cipio aliquo poſitiuo, ſcilicèt leuitate pendere an­
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              tiquì cenſebant, ſed effici huiuſmodi aſcenſum per
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              extruſionem factam à fluidis corporibus ambienti­
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              bus ponderoſioribus. </s>
              <s id="s.000388">Si igitur hæc fuit antiquorum̨
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              ſententia, quomodo eis tribui poteſt tàm enormis
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              abſurditas, quòd nimirum vacuum moueatur, impel­
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              lat, habeat ſitum, & regionem ſursùm, versùs quam
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              tendit? </s>
              <s id="s.000389">quomodò, inquam, hæc affirmare poterant il­
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              li, qui apertè aìebant motus omnes naturales corpo­
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              rum elementarium tendere deorsùm omneſque pen­
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              dere ab vnico principio poſitiuo, ſcilicèt à pleno, &
                <lb/>
              materia corporea? </s>
              <s id="s.000390">nec quia aer ſursùm impellitur,
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              extruditurque, inde ſequitur, quòd vacua in aere
                <expan abbr="cõ-tenta">con­
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                tenta</expan>
              moueantur, atque ſursùm aſcendant, nam ſi va­
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              cuum nil aliud eſt, quàm ſpatium, id erit immobile,
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              & proindè aer ſecum non aſportabit vacuum ipſum
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              ſursùm, ſed in ipſo aſcenſu ſucceſſiuè acquiret noua
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              ſpatia: relinquendo præcedentia, quæ ſunt omninò
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              immobilia. </s>
              <s id="s.000391">at ſi nomen vacui meram pleni priuatio­
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              nem, ac nihilum ſignificet, certum eſt quòd nihilum
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              moueri non poteſt, nec impellere, nec ab vno ad
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              alium locum migrare. </s>
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            <p type="margin">
              <s id="s.000392">
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              Ibidem.</s>
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              Cap. 4. poſi­
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              tiuam leui­
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              tatem noņ
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              dari.</s>
            </p>
            <p type="main">
              <s id="s.000394">Poſtquam conſiderauimus Ariſtotelis argumenta
                <lb/>
              contra Antiquos, qui leuitatem poſitiuam omninò
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              negabant, reſtat modò vt eiuſdem Ariſtotelis ratio­
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              nes pro leuitatis ſtabilimento, & poſitione conſide-</s>
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          </chap>
        </body>
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