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

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            <pb pagenum="240" xlink:href="010/01/248.jpg"/>
            <p type="main">
              <s id="s.001236">
                <arrow.to.target n="marg320"/>
                <lb/>
              cùm imminet aliqua diuturna, & continuata pluuia
                <lb/>
              in illa regione, tunc mercurius in fiſtula per aliquos
                <lb/>
              gradus ſupra conſuetam altitudinem eleuatur, è con­
                <lb/>
              trà pluuia iam actu cadente mercurius in prædicta fi­
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              ſtula deprimi ſolet, nec eſt exigua prædicta differen­
                <lb/>
              tia, multotiès enim Piſis obſeruaui in diuturnis plu­
                <lb/>
              uioſis tempeſtatibus variaſſe mercurij altitudinem̨
                <lb/>
              per duodecim gradus, ſcilicèt per latitudinem vnius
                <lb/>
              pollicis. </s>
              <s id="s.001237">Quia verò aſſeruo penès me exemplar epi­
                <lb/>
              ſtolæ, quam Sereniſſimo Principi Leopoldo modò
                <lb/>
              Cardinali ampliſſimo anno 1657. ſcripſi circa hanc
                <lb/>
              materiam, hìc afferam breuiter ea, quæ tunc ſpecu­
                <lb/>
              latus ſum, quod nimirùm fieri poteſt ob aeris preſ­
                <lb/>
              ſionem ſupra mercurium ſtagnantem in fiſtula, vt an­
                <lb/>
              te pluuiam aer multò magis grauitet, & comprimat,
                <lb/>
              quam in ipſo pluuiæ deſcenſu, quod vt clariùs oſten­
                <lb/>
              dam, præmittendum eſt. </s>
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            <p type="margin">
              <s id="s.001238">
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              Cap. 5. de ae­
                <lb/>
              ris grauitate
                <lb/>
              æquilibrio,
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              ſtructura, &
                <lb/>
              vi elaterią
                <lb/>
              eius.</s>
            </p>
            <p type="main">
              <s id="s.001239">
                <emph type="center"/>
              PROP. CXIV.
                <emph.end type="center"/>
              </s>
            </p>
            <p type="main">
              <s id="s.001240">
                <emph type="center"/>
                <emph type="italics"/>
              In fiſtula Torricelliana intra puteum demerſa ſi aqua
                <lb/>
              à grauiori ſuper addito fluido occupetur, mercu­
                <lb/>
              rius in fistula altiùs ſubleuatur, at post
                <lb/>
              illius delapſum denuo mercurius
                <lb/>
              deprimitur.
                <emph.end type="italics"/>
                <emph.end type="center"/>
              </s>
            </p>
            <p type="main">
              <s id="s.001241">SVmpta fiſtula vitrea ABC flexa in B, & facto iņ
                <lb/>
              ea vacuo, more ſolito, mercurius eleuetur vſque
                <lb/>
              ad F, demittatur poſtea fiſtula intra vas vitreum cy­
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              lindricum DE maximę altitudinis earum quæ exca-</s>
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