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

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        <body>
          <chap>
            <p type="main">
              <s id="s.001249">
                <pb pagenum="243" xlink:href="010/01/251.jpg"/>
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                <lb/>
              pluuia deſcendat, fieri poteſt vt mercurius in fiſtula
                <lb/>
              ſupremam illam altitudinem M pertingat, in eaque
                <lb/>
              permaneat, & hoc nedum à nebulis, ſed à quacum­
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              que alia cauſa grauitante effici poteſt, ſi enim terre­
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              ſtris puluis à vento, vel alia commotion e ſursùm im­
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              pellatur, atque per aerem diſſipetur ſpargaturque
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              tunc nemo dubitat aerem grauiori niſu ſuperficiem
                <lb/>
              orbis terraquei comprimere. </s>
              <s id="s.001250">Si poſtea à qualibet
                <lb/>
              cauſa nebula impellatur, vt nimirùm terram attin­
                <lb/>
              gat, ſcilicèt pluuia paulatim terram aſſequatur
                <expan abbr="eã-que">ean­
                  <lb/>
                que</expan>
              humectet, tunc patet innumera aquæ granulą
                <lb/>
              terræ innici, neque amplius aeris grauitatem, &
                <lb/>
              compreſſionem augere, & quia à terra ſubiecta ſu­
                <lb/>
              ſtentantur, non poſſunt vt priùs ſuo naturali pondere
                <lb/>
              comprimere ſuperficiem infimam mercurij ſtagnan­
                <lb/>
              tis, & propterea ſemper à minori pondere mercu­
                <lb/>
              rius in C comprimitur prout magis pluuia ad terram
                <lb/>
              perducitur, & prout magis aer illo pondere alleuia­
                <lb/>
              tur, & propterea ſuperficies eius in ſuprema fiſtulæ
                <lb/>
              parte ſenſim deprimitur vſque ad infimum ſitum F.
                <lb/>
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              </s>
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            <p type="margin">
              <s id="s.001251">
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              Cap. 5. de ae­
                <lb/>
              ris grauitate
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              æquilibrio,
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              ſtructura, &
                <lb/>
              vi elaterią
                <lb/>
              eius.</s>
            </p>
            <p type="margin">
              <s id="s.001252">
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              Non tamen
                <lb/>
              conuerſa re­
                <lb/>
              gula vera est
                <lb/>
              nam ab alijs
                <lb/>
              cauſis eleua­
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              tio mercurij
                <lb/>
              in fiſtula va­
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              riari poteſt.</s>
            </p>
            <p type="main">
              <s id="s.001253">Licèt hoc verum ſit, non tamen indè elici poteſt
                <lb/>
              conuerſa regula generalis, vt nimirum quotieſcum­
                <lb/>
              que mercurius in fiſtula eleuatur debeat pluuia ex­
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              pectari, quando quidem poteſt huiuſmodi
                <expan abbr="augmentũ">augmentum</expan>
                <lb/>
              compreſſionis produci ab aliqua ingenti agitatione
                <lb/>
              ſupremæ atmoſphæræ; & ſi fortè à particulis aqueis,
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              & terreis ſubleuatis maior grauitas aeris producitur
                <lb/>
              fieri poteſt vt à violentia ventorum alibi tranſpor­
                <lb/>
              tentur nebulæ, & ſic pluuia alibi translata non deci-</s>
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          </chap>
        </body>
      </text>
    </archimedes>
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