Fabri, Honoré
,
Dialogi physici in quibus de motu terrae disputatur
,
1665
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angulus, ſeu conus obtuſior eſt, vis preſſionis major eſt, & hæc eò minor,
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quò ille acutior; Sit autem centrum ſuperficiei FG canaliculo contentæ,
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in quod aëris prementis conus incumbat, vides, ni fallor, quàm acu
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tus angulus futurus ſit; ac proinde vis preſſionis minor; quid mi
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rum ergo, ſi preſſio in AB prævaleat, ac proinde aqua ſupra FG aſ
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ſurgat? </
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Auguſtin.
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<
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"> Quid verò fiet, ſi canaliculi ſegmentum ſũmpta FG, ſit minus
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FE? an fortè aqua vi prædictæ preſſionis effluet per canaliculum? </
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<
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">ſi hoc
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fieret, perpetuum motum haberemus. </
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Antim.
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"> Prævideram, te in hunc ſcopulum impacturum; nempe, in
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quis, ſi aqua per canaliculum majore vi preſſionis vigente in AB, aſſur
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git in DE, haud dubiè ſi reſcindatur ſegmen
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tum canaliculi ME, effluet per os ML, cum
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eadem vis preſſionis aplicata ſit in in AB; ſed
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reverà non effluit ex ML ; & hoc eſt alterum
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experimentum; cùm tamen alioquin iuxta com
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munes Hydraulicæ regulas faciliùs ſit effluere
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ex ML, quàm in DE attolli; ratio eſt, quia vt
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in centrum baſis AB aëris preſſio incumbit,
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ſecundùm angulum, ſeu conum maximè obtu
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ſum, ita in baſim DE, vel in baſim ML, reſecto
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ſegmento canaliculi ME, ſecundùm æqualem
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angulum incumbit; quid mirum ergo, ſi neutra preſſio prævaleat? </
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verò ſi non reſcindatur ſegmentum ME, incumbit in centrum baſis
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ML, ſecundùm angulum acutum, cujus baſis eſt DE, & latus recta ducta
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à D, ad centrum ML. </
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<
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">Vnde preſſio in AB omnino prævalet. </
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Chryſoc.
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<
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"> Sed infra, preſſio in AB ſemper major eſt preſſione in ML ;
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etiam reſecto ſegmento ME; nempe vt aëris preſſio incumbit centro
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baſis AB, idque in reliquis punctis ſecundùm æqualem preſſionis angu
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lum, ſeu conum, item in ſingula puncta baſis ML, ſecundùm æqualem
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priori angulum, refecto ſcilicet ſegmento ME; igitur preſſiones ſunt,
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vt baſes; initur baſis AB, quæ longè major eſt prævalet; igitur ſi tua
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preſſionis ratio ſubſiſteret, aqua ex ML omnino efflueret; non effluit ta
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men, vt fateris vltrò. </
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Antim.
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<
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"> Acutè omnino paralogizas; vt enim gravitatio aquæ con
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tentæ in canali AC, exerit tantùm ſuam vim, attollendo cylindrum IG,
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ad libellam vſque, ſecundùm cylindrum æqualem IG, vt ſupra oſten
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ſum eſt; ita vis preſſionis baſis AB exeritur, attollendo aquam per ca
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naliculum ſecundùm baſim æqualem ML, vbi autem aqua elevata eſt in
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ML, æqualis incumbit preſſio vtrimque, ſcilicet in baſi ML, & ipſi æqua
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li aſſumptæ in AB; ſi verò aquæ ſuperficies ſupponatur in FG, haud
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dubiè minor eſt preſſio in FG, quàm in ML ; igitur quàm in æquali
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ML aſſumptæ in AB; igitur hæc prævalet; vnde aſſurgit aqua ex FG
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in ML: cogita quæſo duci totidem cylindros parallelos deorſum præ
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ſciſa gravitatione, ex ſingulis punctis baſis AB, quibus totidem preſ-</
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