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

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            <p type="main">
              <s id="s.001576">
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              Cap. 7. dę
                <lb/>
              natura flui­
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              ditatis.</s>
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            <p type="main">
              <s id="s.001578">SI modò philoſophari velimus non iuxtà homi­
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              num placita, ſed
                <expan abbr="ſecũdùm">ſecundùm</expan>
              naturæ leges, quatuor
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              conditiones neceſſariæ eſſe videntur ad fluidi conſti­
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              tutionem. </s>
              <s id="s.001579">Primùm vt ſit corpus diuiſum, & ſub diui­
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              ſum in exiguas, & minimas particulas. </s>
              <s id="s.001580">Secundò vt
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              eius figuræ ad orbicularem formam quam proximè
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              accedant. </s>
              <s id="s.001581">Tertiò vt harum ſuperficies, vel ſint per­
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              fectiſſimè lęuigatæ ad
                <expan abbr="modũ">modum</expan>
              ſpeculi, vel
                <expan abbr="ſaltẽ">ſaltem</expan>
              facilli­
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              mè vna ſuper
                <expan abbr="alterã">alteram</expan>
              excurrere, & fluere poſſit. </s>
              <s id="s.001582">Et
                <expan abbr="tãdẽ">tandem</expan>
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              oportet vt omnes habeant
                <expan abbr="æqualẽ">æqualem</expan>
              vim motiuam qua
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              deorsùm tendant, ſcilicèt ſint æquè graues; Poſſent
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              hæc omnia (licèt rudi exemplo) non ineptè confir­
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              mari ſumptis pluribus globulis cryſtallinis,
                <expan abbr="poſitiſq;">poſitiſque</expan>
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              in aliquo vaſe, primò prædicti globuli ad ſigaram̨
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              vaſis adaptantur, & ſi manus vſque ad fundum vaſis
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              immittatur, tunc globuli prædicti locum cedunt, & ad
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              latera excurrunt, præterea poterit moueri vna, vel al­
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              tera pila cryſtallina, quieſcentibus pilis collaterali­
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              bus, vel parum motis; inſuper poſt agitationem ex­
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              planarentur prædicti globuli, non enim aceruum, aut
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              montem efficerent, veluti grana frumenti, aut arenæ,
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              ſed ob eorum læuitatem facilè excurrerent deſcende­
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              rentque versùs infima loca, & ſic ſuprema ſuperficies
                <lb/>
              explanaretur, & proximè horizonti æquidiſtantèr
                <lb/>
              diſponeretur. </s>
              <s id="s.001583">Si poſtea prædictæ ſphærulæ cryſtalli­
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              næ magis exiguæ, & minutæ eſſent, tunc multò faci­
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              liùs prædictæ operationes efficerentur, & ſi tandèm
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              ad ineffabilem paruitatem redigerentur, non poſſent
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              neque tactu neque viſu percipi, ſed apparentem con-</s>
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