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

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        <body>
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            <p type="main">
              <s id="s.001260">
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                <lb/>
              ua reperit, quòd grauitas molis aeris, quæ æqualis
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              ſit cubo aqueo vnius libræ granum vnum pendet. </s>
              <s id="s.001261">at
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              Merſennus in Phęnomenis pneumaticis ope ignis
                <expan abbr="eã-dem">ean­
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                dem</expan>
              experientiam fecit, ſumpſit æolo pilam æream,
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              eamque vehementiſſimo igne calefecit, vt prorsùs
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                <arrow.to.target n="marg328"/>
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              candeſceret, & ſic in bilance perſectiſſima, quæ à ſe­
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              migraro ſlectebatur, examinauit pondus eiuſdem̨
                <lb/>
              ęolo pilæ
                <expan abbr="candẽtis">candentis</expan>
              , eamque reperit
                <expan abbr="vnciarũ">vnciarum</expan>
              4. drach.
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              </s>
              <s id="s.001262">6. & gran. 15. poſtea refrigerata æolo pila eius pon­
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              dus præcedentem ſuperauit gran. 4. & hinc elicit ae­
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              rem incluſum in æolo pila grana 4. ponderaſſe, porrò
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              pondus aeris illius ad æqualem aquæ molem ait re­
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              periſſe in proportione 1. ad 1356. </s>
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            <p type="margin">
              <s id="s.001263">
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              4. de cęlo.
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              cap. 4.</s>
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            <p type="margin">
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              Cap. 5. de ae­
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              ris grauitate
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              æquilibrio,
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              ſtructura, &
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              vi elaterią
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              eius.</s>
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            <p type="margin">
              <s id="s.001265">
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              Prop. 29.</s>
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            <p type="main">
              <s id="s.001266">Sed prædicta experientia multis nominibus infi­
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              delis eſt, primò quia corpora vehementer excalefacta
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              in bilance ſuſpenſa non oſtendunt veram grauitatem
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                <arrow.to.target n="marg329"/>
                <lb/>
              eorum, ſed diminutam, quia vt ſuperiùs oſtenſum̨
                <lb/>
              eſt, ignis diffuſus ab æolo pila candente valdè rare­
                <lb/>
              facit aerem prædictam æolo pilam ambientem, cum­
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              que aer ambiens fimul cum pila vnum corpus graue
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              componat intra denſiorem aerem ſuſpenſum, fit vt
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              aggregatum prædictum minùs graue ſpecie ſit,
                <expan abbr="quã">quam</expan>
                <lb/>
              prius, & proinde imminuitur grauitas æreæ æolo pi­
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              læ, non ſolùm ob deſectum aeris incluſi, ſed etiam ob
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              eius ſeruentiſſimam caliditatem. </s>
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            <p type="margin">
              <s id="s.001267">
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              c 4 prop. 61.</s>
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            <p type="main">
              <s id="s.001268">Rursùs aer in ęolopila à vehementiſſimo igne am­
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              pliatus expanſuſque non poteſt dici verè rarefactus,
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              quia nimirùm copia ignis vehementiſſimè agitati, &
                <lb/>
              circumuoluti intra æolo pilæ cauitatem diſgregat, ac </s>
            </p>
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        </body>
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