Borelli, Giovanni Alfonso
,
De motionibus naturalibus a gravitate pendentibus
,
1670
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quanta eſt grauitas omnium columnarum SD; itaque
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grauitas omnium columnarum appellari poteſt cau
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ſa productiua illius compreſſionis, quam facit infi
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mus cylindrulus GD mercurio immediatè
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cõtiguus
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,
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quia verò huiuſmodi effectus remanet, quando clau
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ditur orificium G, remouenturque columnæ ſupre
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mæ, igitur æquali vi, & æquali menſura debet mer
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curius BF ſublimari. </
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<
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">Id ipſum dici debet de aere SD,
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certum profectò eſt dum orificium G eſt apertum cy
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lindrum aereum GS vſque ad aeris ſupremam ſuper
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ficiem extenſum comprimere cylindrulum aereum̨
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GD tanta vi quanta exigit energia grauitatis aeris
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SG, quando verò digito, vel operculo impeditur
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cõ-tactus
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tactus</
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, & compreſſio aeris ſupremi SG remanet cy
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lindrulus aereus GD eodem modo compreſſus reſtri
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ctuſque, ac prius igitur neceſſario eodem modo ſub
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iectum mercurium D premet proindeque ad
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altitudinem BF eum ſubleuabit. </
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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.</
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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.</
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PROP. CX.
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Idipſum confirmatur in aquæ.
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<
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">VEritas huius aſſerti alio experimento confirma
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tur: Demergatur in aliquo puteo RV aqua ple
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no eadem fiſtula ABG cum mercurio extante FB, vi
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demus quod aliquantiſper mercurius infra libellam
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D deprimitur à pondere
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incũbentis
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aquæ ND, quæ
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paritèr altiùs
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mercuriũ
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in fiſtulam ſubleuat per ſpa
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tium BH, vt nimirùm exceſſus FH ſupra eam eleua-</
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