Fabri, Honoré
,
Dialogi physici in quibus de motu terrae disputatur
,
1665
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8
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025/01/012.jpg
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Solis motus ſimpliciſſimus ſit. </
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<
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id
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s.000107
">Pati modo cogita Solem ſimul inclinari
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ab Apogeo ad Perigeum, & viciſſim, hæc ſecunda determinatio, vel in
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clinatio ſimplici motui non obeſt, vt patet: In hoc porrò motu, Ecliptica
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etiam moueri fingitur circa Axem mundi, ac proinde Eclipticæ ſectio in
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Solari globo eadem ſemper eſt; denique, finge, Solem circa ſuum cen
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trum ita revolvi 27. circiter dierum ſpatio, ab ortu in occaſum, ratione il
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lius hemiſphærij, quod ad terram ſpectat, vt axis, circa quem voluitur, in
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clinatus ſit ad Eclipticæ planum, & ſibi ſemper parallelus; quod ſanè ſim
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plicitatem motus non deſtruit; ſic enim ſæpè ac ſæpiùs globos projicimus;
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imò hic naturalis eſt globorum motus. </
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Auguſtinus.
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</
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<
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id
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"> Duo ſunt motus, ni fallor, orbis, ſcilicet, & centri ſimplex
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igitur motus non eſt. </
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Antimus.
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</
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<
s
id
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s.000111
"> Igitur motus naturalis, quo corpus grave, v.g. globus fertur
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deorſum non eſt motus ſimplex, ſed mixtus, quod nemo dixerit, cum ſim
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pliciſſimus ſit, vtpote ab eodem principio, ſcilicet à gravitate: ſi enim de
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mittas globum, primò quidem per planum inclinatum, ex quo inde per li
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berum aëra perpendiculariter deſcendat, videbis illicò duos illos motus
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quos dicis, centri & orbis; qui tamen reverà duo motus non ſunt, ſed vnus
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ab vna eademque gravitate profectus. </
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Auguſtinus.
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</
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<
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id
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"> Nonnulli ex veſtris, vt ſalvent paralleliſmum illius axis, cir
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ca quem Sol revolvitur, adhibent alium motum revolutionis annuum cir
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ca Solis axem, axi Eclipticæ parallelum. </
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Antimus.
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</
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<
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id
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"> Ita prorſus. </
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<
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id
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">Sed eſt motus fictus, eo fine, vt meliùs res illa in
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telligatur: vt enim terra circa axem axi Elipticæ parallelum revolui dici
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tur annuo motu, in veſtra hypotheſi ab occaſu ad ortum, ratione hemi
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ſphærij ad Solem verſi, vt axem, circa quem fit motus diurnus, ſemper pa
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rallelum ſervet, ita prorſus ſolaris globus revolui dicendus eſt annuo mo
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tu, ad prædictum phœnomenum Axis paralleli ſalvandum; ſed vtrimque
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hic motus fictitius eſt, cùm ſimplex turbinationis motus ſufficiat, circa
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Axem inclinatum ad planum Eclipticæ, ſemper ſibi ipſi parallelum. </
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<
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id
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">Ana
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logiam habes in acu magnetica, quæ cum pixide ſua ita movetur, vt ſine
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novo motu, ſibi parallela ſemper maneat. </
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Auguſtin.
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</
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<
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id
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s.000119
"> Igitur non tres, aut quatuor motus in
<
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abbr
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nõſtra
">noſtra</
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hypotheſi ſta
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tuendi ſunt, vt ſupra dicebas; cum vnus duntaxat, eo quo explicas modo
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ſufficiat: cur ergo quatuor neceſſarios eſſe fingis? </
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Antim.
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</
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<
s
id
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s.000121
"> Iuxta morem veſtrorum, & aliorum locutus ſum, qui prædictos
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motus diſtingunt; fateor tamen, in veſtra hypotheſi, duos motus ſuffice
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re, alterum turbinationis in terreſtri globo, ſervato, vt dixi, paralleliſmo
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Axis; alterum ſimplicis revolutionis in Sole, circa Axem pariter inclina
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tum, vt dixi, ad planum Eclipticæ. </
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<
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id
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s.000122
">In noſtra verò vnus duntaxat motus
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ſufficit turbinationis, circa axem pariter inclinatum ad planum Eclipticæ,
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& ſibi ſemper parallelum, cum gemina illa inclination ereciproca, in Bo
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ream, & Auſtrum, & ſurſum atque deorſum; ſic turbo actus, orbes ſuos
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ita deſcribit, vt aliquando majores, aliquando minores ſint; quod certè,
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vt dixi, ſimplicitati motus turbinationis non obſtat: Ex his autem, vt </
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