Fabri, Honoré
,
Dialogi physici in quibus de motu terrae disputatur
,
1665
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quia cognoſcitur locus, tum Solis, tum Iovis; habentur igitur alia late
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ra trianguli; habetur igitur DK, radius Epicycli Mediceæ ; hæc autem
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maximæ digreſſionis menſura vulgò ponitur : ſed profectò fallit; quia
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cum bis ac tertiò obſervarim quartam Mediceam emergentem, & accura
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tè meritus fuerim illius diſtantiam, eo temporis momento, à centro Iovis,
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puta MD, certè DK longè minor evaſit, quam DF ; hic ergo modus, vt
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fallax, rejiciendus eſt. </
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<
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">Sextò, Rectè autem deduco, Mediceam non moveri in circulo circa
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Iovem, non modò ex ſpatiis æqualibus, diurno motu confectis à Medi
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cea, in recta FG, ſi enim ex Apogæo G, per Quadrantem circuli GPE,
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ire ſupponatur, aſſumptis arcubus æqualibus GMPRE, ductiſque re
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ctis MZ, PY, RV parallelis GA, videbitur decurrere ſpatia AZYVE
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omnino inæqualia: ſed æqualibus temporibus æqualia decurrere vide
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tur; igitur non modo ex ſpatiis æqualibus, æquali tempore, in recta per
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centrum Iovis eunte, à Medicea decurſis, deduco, illam non moveri in
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circulo circa Iovem, ſed etiam ex eo quod, primùm emergens minùs di
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ſtet à centro Iovis, quàm diſtare deberet, cùm enim diſtantia Iovis
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à terra ſit ferè quintupla diſtantiæ Solis, ac proinde angulus maxi
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mæ Proſthaphæreſeos ſit ferè 11. grad. min. 32. Sit centrum Iovis A,
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maxima digreſſio quartæ Mediceæ AE. 11. circiter Diametrorum Iovis,
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vt mihi conſtat ex multis obſervationibus, ſit Quadrans ortivus Epiclyci
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GE, & Apogæum G, ſit angulus GAK 11. grad.min. 32. ſit BA Semi
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diameter Iovis, ducatur BL parallela AK, item NS, ſectio vmbræ pro
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jectæ erit Parallelogramma NL, diſtante Sole versùs occaſum grad. 78.
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min. 28. in quo puncto angulus Proſthaphæreſeos eſt 11. grad. min. 32.
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igitur in L eſt punctum emerſionis quartæ Mediceæ ; demittatur LD, Me
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dicea primùm emergens videbitur in D ; continet autem DA Diametros
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Iovis 2
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tam Mediceam primùm emergentem ex vmbra projecta, à Iovis centro viæ
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diſtare duabus integris Diametris. </
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