Fabri, Honoré
,
Dialogi physici in quibus de motu terrae disputatur
,
1665
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globo vides, inter Gibbum Africæ, extremumque Braſiliæ promontorium
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coërceri, vnde intumeſcat aſſurgatque cum impetu, neceſſe eſt, adver
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sùs oppoſitam ſibi, quaſi aggerem, Guineæ oram. </
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Auguſtin.
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<
s
id
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s.001481
"> Non eſt dubium, quin æſtus linea ad tem hanc multùm, ne
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dicam totum conferat; nondum tamen ſatis capio, vnde & quomodò
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hæc linea ſtatuatur potiùs quàm alia; hac enim ſemel ſuppoſita, inde
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facilè deducam, vtrùm magnus, an parvus æſtus ſit, in data quali
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bet ora. </
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<
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Antim.
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type
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italics
"/>
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<
s
id
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s.001483
"> Rem acu tetigiſti; hæc enim linea æſtus, ſeu curſus
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abbr
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aquarũm
">aquarum</
expan
>
,
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quem ſi paulò vehementior ſit & contractior, Eurippum vocant, ab ea
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dem cauſa procedit, à qua æſtus ipſe, vel aquarum elevatio; ſcilicet ab in
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æquali aëris preſſione, & inæquali niſu; itaque ex pluribus capitibus hæc
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linea æſtus determinari poteſt. </
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<
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id
="
s.001484
">Primò, in præmiſſa hypotheſi ſolus eſſet
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aquarum motus ab ortu in occaſum, vt jam ſupra dictum eſt; nempe ille
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idem preſſionis niſus ſemper duraret, & tantus eſſet aquarum tumor,
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ſub vno Meridiano, quantus ſub alio, ſub eodem ſcilicet Parallelo; at
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poſita tali ſuperficie terræ qualis modò eſt, in ſingulis ferè punctis ejuſ
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dem Paralleli, mutatur niſus; quia mutatur illius cauſa; diverſa eſt enim
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arcuum vtilium ratio; hinc diverſa linea ſequitur; ſi enim æqualis ſit
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niſus ab Auſtro; Aquilone & Ortu, & minor, aut nullus ab occaſu, in
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occaſum linea motus ibit; ſi æqualis ab Auſtro, Occaſu & Ortu, & mi
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nor in Aquilone, ad Aquilonem ibit; atque ita de aliis; & cùm infinitæ
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ſint combinationes niſuum, vt ſunt infinitæ diverſarum preſſionum,
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etiam ſub eodem Parallelo, quia infinitæ-mutationes ſuperficierum
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ex arcubus vtilibus conſtantium, tum in magnitudine, tum in ſitu,
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inde ſequitur infinitas eſſe poſſe, ac reverà eſſe lineas æſtus, quæ ex
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diverſo niſu naſcuntur: Primum igitur caput, ex quo talis linea ſtatui
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tur, eſt talis ratio niſus, ſeu preſſionis. </
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<
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id
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">Secundò à quibuſdam locorum
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anguſtiis petitur, ſeu maris ſeu freti, quod ſecundùm talem vel talem
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lineam excurrit; cùm enim aqua preſſionis vi extrudatur, & continen
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tis vtrimque aggeres aquam contineant, quid mirum, ſi per freta
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currat, atque adeò ab alveo freti linea æſtus determinetur. </
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<
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id
="
s.001486
">Tertiò, Si
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vtrimque vis preſſionis in vtrumque freti oſtium aquam intrudat, in
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tra fretum æſtus concurrent. </
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>
<
s
id
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s.001487
">Quartò, quando æſtus valdè obliquè in
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cidit in aliquam oram, non reflectitur, ſed ipſam oram præterlabitur;
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immò ſi ipſa hora ad modum ſinus cavi eſt, æſtus ſemiorbe peracto, ver
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sùs eam partem, vnde venerat, declinat; hinc mutatio lineæ: ad hoc ca
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put revoca reflexionem. </
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<
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id
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s.001488
">Quintò, Æſtus alterius maris ex anguſtis fauci
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bus erumpens, & in alium incidens, lineam mutat; nempe ex vtroque qui
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dam motus mixtus reſultat, ac proinde nova linea. </
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<
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Auguſtin.
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type
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<
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id
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"> Cuncta hæc in rem hanc optimè quadrant: quare nihil aliud
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reſtat, niſi vt fidelis & accurata Marini æſtus hiſtoria deſcribatur, vt ſcia
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mus quænam ſit linea æſtus in qualibet ora; Tu verò me tibi ſummopere
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obſtringeres, ſi aliquot exempla breviter afferres, quibus ea, quæ dixiſti,
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meliùs conſtarent. </
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