Fabri, Honoré
,
Dialogi physici in quibus de motu terrae disputatur
,
1665
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cies KI in canaliculo verò ſit D ; volam manus admove
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eri BC cum modica preſſione; ſtatim aqua per canalicu
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lum altiùs aſſurgit versùs F ; vbi verò repentino motu ma
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nus ab ore AB, amovent, deſcendit aqua præceps in G.
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ſed ſtatim denuo aſſurgit versùs F. </
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<
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Auguſtin.
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<
s
id
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s.001894
"> Ex præmiſſis huius experimenti facilè ratio
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nem afferam, nempe aër vola preſſus aquæ ſuperficiem KI premit, ex cujus
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preſſione, per canaliculum neceſſariò altiùs aſſurgit : amota autem repente
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vola, aquæ ſuperficiem AB ſecum tantulum adducit, attollítque; vnde
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aquam per canaliculum ſubſidere neceſſe eſt. </
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Antim.
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<
s
id
="
s.001896
"> Inde omnium huiuſmodi experimentorum communem ratio
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nem reddo: ſi enim aër magis compreſſus aquam per canaliculum attol
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lit; certè minùs altè attollit; nullo modo preſſus non attollit; adductus
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verò, ſecum versùs G aquam m canaliculo contentam adducit. </
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<
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id
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s.001897
">Et verò,
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vt tandem ad rem propiùs accedam, cùm hic motus, quo aqua aſſurgit,
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non ſit ab intrinſeco, vt conſtat ex dictis, nec enim aqua ſpontè ſua aſ
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cendit, ab alia cauſa extrinſeca illum eſſe, neceſſe eſt; eaque profectò
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applicata quænam porrò illa eſt, niſi aër? </
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>
<
s
id
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s.001898
">quidquid tandem aër ſit, ſive
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purus, ſive impurus, id eſt aliis corporibus admixtus; aër porrò applica
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tus motum illum imprimere nequit, niſi vel gravitando, vel illo niſu, qui
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ex compreſſione corporum ſequitur; primum dici non poteſt, cùm enim
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gravitet per cylindros parallelos, æquè gravitat in minorem aquæ ſuper
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ficiem, ac in majorem ; ac proinde vtraque, ſi gravitationis dumtaxat ra
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tio habeatur, in eadem libella ſita eſt, nec vna aſſurgit ſupra aliam, re
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ſtat igitur, vt dicamus, aëra tantulum compreſſum cum niſum exerere in
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ſuperficiem BC, non quidem per cylindros parallelos; ſed per conos,
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quorum ſinguli vertices ſingulis ſuperficiei punctis incumbunt; ac proin
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de minorem niſum exeri adversùs ſuperficiem aquæ CD canaliculo con
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tentæ, quia ſub minoribus angulis exeritur, vt ſupra luculenter oſtenſum
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eſt; prævalet igitur preſſio incidens in ſuperficiem BC ; ac proinde aliam
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CD attollit versùs F. </
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Chryſoc.
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<
s
id
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s.001900
"> Iam obſervo inde germanam duci rationem, illius addu
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ctionis atramenti; vbi enim atramenti guttam calami roſtrum extre
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mum attingit, (quod pueri facere ſolebamus) attramentum illico
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aſſurgit, & cavum calami roſtrum implet; in alio liquore idem ſuc
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ceſſum iri, certiſſimum eſt; calamum tamen priùs humectatum fuiſſe
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oportet. </
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Auguſtin.
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<
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id
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"> Luculentam rationem jam attulit Antimus; ſic enim com
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planatur ſuperficies calami, alioquin multis rugis & ſalebris ſtriata & aſ
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perata, huic autem experimento communis illa ratio Antimi facilè ap
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plicatur, ab inæqualis preſſionis niſu petita; nam reverà in totam guttæ
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ſuperficiem, excepto ſcilicet puncto illo contactus, in quo extre
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mum roſtrum guttæ immergitur, major eſt preſſionis niſus, quàm in ca
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vam roſtri ſuperficiem; quid mirum ergo ſi prævaleat illa, & humor per
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cavum roſtrum aſcendat? </
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<
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id
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">aliquid ſimile in omnibus guttis obſervo, ad-</
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