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

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            <p type="main">
              <s id="s.000680">
                <pb pagenum="136" xlink:href="010/01/144.jpg"/>
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                <lb/>
              quæ omnia falſa ſunt, & contra ſenſus euidentiam;
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              Fatendum igitur eſt, ab igneis particulis fumum ra­
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              refactum eleuari ab impulſu grauioris aeris ambien­
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              tis per expreſſionem. </s>
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            <p type="margin">
              <s id="s.000681">
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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.000682">
                <emph type="center"/>
              PROP. LXVII.
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              </s>
            </p>
            <p type="main">
              <s id="s.000683">
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                <emph type="italics"/>
              Flamma eſt fumus accenſus magis rarefactus, qui ab aere
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              ambiente velocisſimè ſursùm exprimitur.
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                <emph.end type="center"/>
              </s>
            </p>
            <p type="main">
              <s id="s.000684">PErcepta iam & declarata fumi
                <expan abbr="cõſtructione">conſtructione</expan>
              per­
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              pendere modò iuuat metamorphoſim, quam̨
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              patitur quando inflammatur. </s>
              <s id="s.000685">Debemus igitur con­
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              cipere minimas particulas ſulphureas in fumo con­
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              tentas, cùm inflammantur, maximè dilatari, rarefieri,
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              & vehementiſſimè agitari, & in hoc conſiſtere eius
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              accenſionem, ſed granula illa aquea, & terrea eiuſ­
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              dem fumi, quæ ex ſua natura accenſibilia non ſunt,
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              poterunt tantummodò rarefieri multò magis, quàm
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              priùs. </s>
              <s id="s.000686">iam à prædicta ferè
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              rarefactione,
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              agitatione, & accenſione ſubſequitur conſequen­
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              tèr ſplendida, & luminoſa apparentia flammæ. </s>
              <s id="s.000687">Ad
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              hæc aeris ambientis grauitas, licèt exigua ſit, ſupe­
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              rabit nihilominùs notabili exceſſu minimum, & in­
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              ſenſibile pondus ipſius flammæ multò, & multò ma­
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              gis, quàm ſuperauerat pondus
                <expan abbr="præcedẽtis">præcedentis</expan>
              fumi:hinc
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              neceſſariò flamma ab ipſo aere per extruſionem ſur­
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              sùm impelletur ineffabili velocitate. </s>
              <s id="s.000688">Et hìc plurima
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              aduertenda ſunt. </s>
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          </chap>
        </body>
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