Fabri, Honoré
,
Dialogi physici in quibus de motu terrae disputatur
,
1665
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te humoris gravitate, qui cùm in puncto contactus quaſi ſuſtinea
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tur, & partes inter ſe aliquam tenacitatem habeant, & premens aër
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vndequaque premat, ac proinde ab ima parte quaſi ſuſtineat latera
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les humoris partes, hæ minimè ſubſidunt; hinc vbi major eſt humoris
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quantitas, ſubſidit humor, & gutta deprimitur, prævalente ſcilicet humo
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ris pondere. </
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Antim.
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<
s
id
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s.002036
"> Rectè omninò mentem meam & ſenſum aſſequeris; hinc
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multa experimenta omnibus obvia ad idem principium reduco. </
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<
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id
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s.002037
">Primò,
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vbi vna gutta in aliam incidit, duæ in vnam eandemque abeunt; nem
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pe in eo contactus puncto, in quo vna tangit aliam, ab externo aëre non
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premitur, ſed in aliis omnibus; hinc cedit humor in eo puncto, atque
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adeò vna intra aliam intruditur. </
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<
s
id
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s.002038
">Secundò, Gutta pendula hæret aliquan
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do vel in ſuperficie ligni, quæ deorſum vergit, vel extremo naſo; vnde
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hoc? </
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<
s
id
="
s.002039
">quia premit aër ab omni parte, ea dumtaxat excepta, quæ ligno
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vel naſo adhæret; ea autem vis eſt preſſionis, quæ guttam hærentem ſu
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ſtineat; ſi autem ſcire velis, quanta ſit hæc gutta, illico reponam, æqua
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lem eſſe humoris portioni, quæ per canaliculum attollitur, vt ſæpè pro
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bavi. </
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<
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id
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">Tertiò, Si partem inferiorem guttæ pendulæ, vel minima feſtu
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ca tangas, ſtatim effluit per admotam feſtucam; quia in eo puncto, in
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quo feſtuca guttæ admovetur, aër non premit, quia non tangit; aliæ
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igitur partes prementes prævalent; igitur accedente præſertim gravita
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te, ſeu pondere guttæ pendulæ, gutta decidit. </
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<
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id
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s.002041
">Quartò, Si verò tangas in
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ſuperiore portione laterali, & lentè feſtucam adducas, gutta ſequitur,
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non quòd vlla vis tractrix inſit, quæ in hoc præſertim caſu fictitia eſt,
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ſed quia partem illam aër non premit, ſed oppoſitam, illa cedit huic præ
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valenti; vnde ſi feſtuca reducitur, vi preſſionis, in prædicta parte oppoſi
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ta, guttam ſequi neceſſe eſt. </
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<
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id
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">Quintò, Guttæ humoris, plano in ſitu ver
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ticali ſito etiam adhærent, propter eandem rationem, quam non re
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peto. </
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<
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id
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">Sextò, In guttis Mercurij id diſcriminis eſt, quod paulò majores
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non adhæreant, propter majus pondus, ſecus minores, pro quo eſt eadem
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ratio, iſtæ autem perfectiùs tornantur; quia Mercurius tenacior eſt & craſ
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ſior; accedit, quòd in planorum Strias & Salebras non ſubit, vt aqua; igi
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tur faciliùs ſeſe ſuſtinet. </
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Chryſocom.
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<
s
id
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"> De bullis vel ampullis, idem facilè dixero; quæ ſic tornan
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tur ab aëre preſſo tum interiore, tum exteriore: feſtucam etiam admotam
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ac deinde reductam ſequitur bulla, propter eandem rationem: in hoc certè
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nullam video difficultatem; ſed perge quæſo, Antime, ac recenſe alia expe
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rimenta, quæ haud dubiè obſervaſti. </
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Antim.
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<
s
id
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s.002047
"> Hoc facere meditantem interpellaſti. </
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>
<
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id
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s.002048
">Septimò, Igitur vbi pup
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pus vel extremam linguam papillæ mammæ affigit, lac ſtatim effluit;
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quia ſcilicet aër vndequaque mammæ ſuperficiem premit, excepta illa par
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te extrema, cui lingua puppuli adhæret ; quid mirum igitur ſi lac exprima
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tur? </
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<
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id
="
s.002049
">Octavò, Niſi extra chorum ſaltare timerem, huc etiam adducerem co
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nicam flammæ Figuram, ad quam inducendam aëris preſſio non parum
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confert; cùm enim ab halitu igneo ſurſum extruſo aër valde rareſcat, </
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