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

Table of figures

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[181. Figure]
[182. Figure]
[183. Figure]
[184. Figure]
[185. Figure]
[186. Figure]
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              <s id="s.000918">
                <pb pagenum="180" xlink:href="010/01/188.jpg"/>
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                <lb/>
              retur, nullo pacto in tali caſu poſſet aqua ab inferiori
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              ſitu H ſursùm impellere aerem G, propterea quod
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              aqua DB cogitur excurrere deorsùm per vaſis aper­
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              tum foramen B, & ideò non poteſt motu reflexo ſur­
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              sùm impellere aerem G. igitur neceſsè eſt vt globus
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              aereus G deferatur à vi fluentis aquæ, vt ipſa experi­
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              entia oſtendit. </s>
              <s id="s.000919">Vnde colligitur, quod nullum ex ad­
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              ductis, & excogitatis
                <expan abbr="experimẽtis">experimentis</expan>
              vſque adhuc euin­
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              cere perſuadereque poteſt exiſtentiam leuitatis po­
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              ſitiuæ, & è contrà ſemper multò magis confirmatur,
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              demonſtraturque eius non exiſtentia, quaproptèr fa­
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              tendum eſt corpora, quæ leuia appellantur, ſursùm
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              impelli per extruſionem à fluidis ambientibus gra­
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              uioribus. </s>
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              <s id="s.000920">
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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>
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            <p type="main">
              <s id="s.000921">Sed coronidis loco afferam demonſtrationem à
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              me excogitatam, abſolutè non dari in natura
                <expan abbr="poſitiuã">poſitiuam</expan>
                <lb/>
              leuitatem, vtque commodiùs hoc efficiam primò
                <lb/>
              nonnullas ſuppoſitiones ſenſui manifeſtas
                <expan abbr="proponã">proponam</expan>
              ,
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              & deinceps aliqua lemmata ex principijs mechani­
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              cis deſumpta demonſtrabo. </s>
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              <s id="s.000922">
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              DEFINITIO I.
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            <p type="main">
              <s id="s.000923">ET primò noto, quòd corpus ſiue ſimilare, & ho­
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              mogeneum, ſiue heterogeneum, tunc vocatur
                <lb/>
              exiſtimaturque rarius ſpecie, quàm aliud, quando
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              ſumptis æqualibus molibus eorumdem illud
                <expan abbr="minorẽ">minorem</expan>
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              copiam materialis ſubſtantiæ corporeæ, & ſenſibi­
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              lis comprehendit in eodem ſpatio, quàm iſtud, quòd
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              profectò concipi poteſt, ſi intelligatur mino: copia </s>
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