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

Table of figures

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                <pb pagenum="210" xlink:href="010/01/218.jpg"/>
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                <lb/>
              preſſio ſupra ſuperficiem hydrargyri D altiùs ele­
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              uatur mercurius in fiſtula BFA. ſic ſi noua fiſtula, vel
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              inſtrumento pneumatico aer inſuffletur, vt compri­
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              mat ſuperficiem hydrargyri D eleuatur quoque ſu­
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              prema ſuperficies F hydrargyri in fiſtula clauſa; & ſi
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              è contrà embolo retracto, velùti exugatur aer impe­
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              diatur que compreſſio eius ſupra mercurium D ſpon­
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              tè labetur mercurius deſcendetque deorsùm versùs
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              B. præterea ſi ſupra mercurium in D infundatur aqua,
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              quæ propagetur vique ad libellam GI, tunc quidem
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              mercurius quoque eleuatur ab F vſque ad H, & quod
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              mirum eſt, eleuatur mercurius præcisè pro menſura
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              ponderis aquæ incumbentis GD, ſcilicèt altitudo G
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              D erit quatuordeciès maior, quàm FH, quia talis re­
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              ciprocè eſt proportio ponderis mercurij ad aquam.
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              </s>
              <s id="s.001089">Si igitur in ſpatio inani nulla alia cauſa vlterioris ele­
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              uationis hydrargyri FH aſſignari poteſt præter gra­
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              uitatem aquæ collateralis GD cum qua mercurius F
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              H æquilibrium efficit, quare negabimus reliquum
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              mercurij FB eleuari à pondere aliquo premente ſu­
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              perficiem D, quæ ſit ſemper eiuſdem roboris? </s>
              <s id="s.001090">cùm­
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              que nullum aliud corpus grauitans aſſignari poſſit
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              prætèr aerem, igitur neceſſariò ab hoc mercurius
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              eleuatur. </s>
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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="main">
              <s id="s.001092">Prætermiſſis alijs experimentis excogitatis à viris
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              doctiſſimis in Italia, Gallia, & Anglia, de quibus fusè
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              agitur in libro
                <expan abbr="experimẽtorum">experimentorum</expan>
              noſtræ Academiæ ex­
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              perimentalis Mediceæ nè repetamus ea, quæ iam paſ­
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              ſim vulgata ſunt, tantummodò recenſebo, & ad exa-</s>
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