Fabri, Honoré
,
Dialogi physici in quibus de motu terrae disputatur
,
1665
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versùs illud centrum, cui propior eſt; accedit, quòd ex Luna vmbræ im
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merſa vapor non educitur, vnde nova in ſiccitatis aut humoris vi muta
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tio ſequitur, immò & minor æſtus diebus, qui deinde ſequuntur; quia ſci
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licet totus ille humor deſideratur, qui toto Lunaris deliquij tempore So
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lis vi eductus fuiſſet. </
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Antim.
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"> Vnum omittis, quod certè dignum ſcitu eſt; ſit enim lagenula
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quæpiam A, ex cuius ventre aſſurgat ſurſum
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canaliculus GF ad inſtar roſtri; impleatur aqua
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ſit què ſuprema ſuperficies aquæ BC, per cana
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liculum aſturgit ſupra libellam CD ; an fortè eo
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tempore, quo tumet æſtus, id eſt, quo Luna eſt
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in Meridiano; minùs aſſurgit
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puta in E; plus
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verò, puta in F, eo tempore quo à Meridiano 90.
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gradibus diſtat. </
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Auguſtin.
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"> Rem magnam narras, Antime; ſed fortè fabulam narras,
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cuipiam haud abſimilis, qui aquam Marinam in canaliculo contentam flu
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xum & refluxum pati aſſerebat. </
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Antim.
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"> Seriò loquor, in his enim religioni ducerem, tibi aliiſque tui
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ſimilibus imponere: ſed miror à te non videri; totum hoc ex præmiſſa do
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ctrina ſequi; nempe aër in hoc infimo tractu compreſſus, vt dixi, premit
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ſuperficiem aquæ BC ; ſed cùm ſuperficiem D minùs premat, quid mirum,
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ſi preſſio in BC prævaleat? </
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">Minùs autem premitur ſuperficies D, quàm
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CF; quia compreſſum corpus exerit ſuam vim quoquo versùm per om
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nes lineas, v.g. centrum baſis BC, aër ſuperfuſus per omnes lineas premit,
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contentas intra conum maximè obtuſum, & baſim D, per lineas contentas
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intra conum valdè acutum; quid mirum igitur, ſi preſſio in BC ſuperet
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preſſionem in D, ac proinde aqua aſſurgat. </
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Chryſocom.
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"> Nunquid hoc tribui non poſſet Cylindro aëris gravitanti
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in baſim BC, qui longè gravior eſt Cylindro gravitante in baſim D ; ſunt
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enim Cylindri ; vt baſes. </
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Auguſtin.
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"> Nullo modo, nempe ſi habeatur ratio gravitatior. </
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<
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">is, non
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aſcendit aqua ſupra D ; quia gravitatio in perpendicularibus parallelis
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accipienda eſt; neque in hoc vlla eſt difficultas; cum ſit primum quaſi
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principium Hydraulicæ, aquarum
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ſuperficies eſſe ad libellam;
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attenta ſcilicet dumtaxat aquæ gravitate, ſecus tamen res ſe habet, ſi am
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bientis preſſio accedat; in hoc quippe gravitatio à preſſione diſfert, quod
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hæc in Sphæram agat; ac proinde in idem punctum preſſæ ſuperficiei per
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lineas infinitas ad illud idem punctum terminatas, illa verò per lineas
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parallelas deorſum; ac proinde in idem punctum ſuperficiei vna tantùm
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linea gravitationis cadat; vnde ratio petitur propter quam Cylindrus
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major aquæ BG attollere minorem GD ſupra D non poſſit. </
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<
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">Porrò ex te
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ſcire velim, Antimo, vtrùm in refluxu aqua altiùs aſſurgat quam in fluxu
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per canaliculum GF. </
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Antim.
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<
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"> Omnia ferè complecti viſus es, & ſingularem aëris compreſſi
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effectum perſpicuè diſtinxiſti ab ipſo niſu gravitationis ; ſi vel vnum ver-</
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