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

Table of figures

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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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              PROP. CV.
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              Exponitur quare, & quando aer relictus in fiſtula Torri­
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              celliana altitudinem mercurij conſuetam deprimere
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              debeat; & ſimul traditur modus menſurandi
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              maximam aeris dilatationem.
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              <s id="s.001138">EX Roberuallij pulcherrima obſeruatione illius
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              veſicæ cyprinæ, quæ in vacuo fiſtulæ dilatatur
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              ego conieci reperiri facilè poſſe in eodem Torricel­
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              liano inſtrumento maximam amplitudinem, ad
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              aer non compreſſus à vi externa, & in ſua libertatę
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              relictus dilatari queat, quæ dilatatio certum, ac de­
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              terminatum ſpatium in vacuo Torricelliano occupa­
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              ret, quod nimirum ſufficienter exciperet maximam
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              eiuſdem aeris expanſionem. </s>
              <s id="s.001139">Hinc poſtea
                <expan abbr="deducebã">deducebam</expan>
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              molem aeris, quæ præcisè ſpatium vacuum in Tor­
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              ricelliano inſtrumento occuparet (quam molem me­
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              diocrem appellabimus) non poſſe deorsùm impelle­
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              re, & magis
                <expan abbr="cõprimere">comprimere</expan>
              ſuperficiem ſupremam mer­
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              curij ſtagnantis, ac proindè omnes moles aeris mi­
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              nores illa, & ideò minus ſpatium poſt totalem eo­
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              rum dilatationem exigentes non poſſe prædictam
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              mercurij ſupremam ſuperficiem deprimere,
                <expan abbr="">cum</expan>
              è con­
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              trà moles omnes acris excedentes ſupradictam me­
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              diocrem molem, & ideò exigentes amplius ſpa­
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              tium deprimere neceſſariò
                <expan abbr="ſupremã">ſupremam</expan>
              mercurij ſuper­
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              ficiem in fiſtula infra conſuetam altitudinem vnius
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              cubiti, & quadrantis. </s>
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