Fabri, Honoré
,
Dialogi physici in quibus de motu terrae disputatur
,
1665
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37
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025/01/041.jpg
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partim versùs A tendat, ſemoto motu circulari, ibit, vt dixi, per lineam ſpi
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ralem DQH; volvatur ADQH circa Axem BC deſcribet curva DQH
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ſuperficiem ſolidi cuiuſdam ſpiralis; & ſi interea dum punctum deſcribit
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eo duplici motu curua DQH moveatur circa eundem Axem BC,
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deſcribet in dicta ſuperficie ſpiram compoſitam ex totidem Helicibus;
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vt autem Helices omnes ſint ferè inter ſe æquales, obſervabis præclarum
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Naturæ inſtitutum; ſupponamus Apogæum Solis in D, initio Cancri
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cùm DI plus diſtet ab FK quàm hæc ab HL, haud dubiè plus temporis
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ponit à Cancro ad Libram, quàm à Libra ad Capricornum; en tibi ratio
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nem Anomaliæ Solis; quod verò ſpectat ad circulos diurnos, quos ſin
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gulæ Helices, ſeu ſpiræ repræſentant; à D ad Q tantulùm creſcunt, ſcili
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cet vt ſemidiametri paralleli BD, AQ; à Q verò, vſque ad illud pun
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ctum, in quo recta DGE ſecat curvam DQH ita decreſcunt, vt deſcri
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ptus ab illo puncto ſit æqualis primo; ab eo verò puncto versùs H, fiunt
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minores & minores circuli, ita vt vltimus, cuius radius eſt CH, ſit ad
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primum, cuius radius eſt BD, vt AC ad AB, vel CH ad BD; eſt
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autem HE iuxta communem Anomaliæ menſuram ferè 1/1
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AE, ac proin
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de circulus ille vltimus eſſet minor primo 1/1
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igitur cum Sol ſupponatur
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æquali ſemper motu agi, longè citiès perficiet ſuum orbem in H quàm
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in D, ſi movetur in circulo, nempè illo iam abſoluto, ſuperſunt huius
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12. grad. igitur tempus, quo circulus diurnus decurritur in H, eſt brevius
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tempore, quo decurritur in D 48. minutis horæ. </
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<
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id
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">Sed hoc eſt abſurdum,
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imò abſurdiſſimum; & vt natura huic incommodo occurreret, licet ſpa
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tium CA ſit minus ſpatio AB, ſegmentum tamen curvæ QH vix minus
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eſt ſegmento
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Dq;
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igitur tantùm temporis à Q ad H, quantum à D ad
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Q ponere deberet; quia tamen ex hoc ſequeretur abſurda circulorum diur
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norum inæqualitas, contra finem à Natura intentum, hæc enim ſpirarum
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diurnarum æqualitatem intendit, cùm circuli diurni omnium reliquorum
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menſura ſint, ita diſtrahuntur ſpiræ in ſegmento QH, vt pauciores ſint,
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quàm in ſegmento
<
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Dq;
">DQ</
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ita tamen vt ſingulæ ferè æquales ſint ſingulis;
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Cogita explicatam vtramque ſpirarum congeriem in duas lineas rectas,
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maior erit ad minorem ferè vt 92. 1/
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ad 89. 1/
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, ſeu vt 1103. ad 1077. So
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lers igitur Natura ita attemperavit vtramque inclinationem, vt ſingulæ
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ſingulis æquales ſint in quantitate, & in tempore; atque ita motum
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vnum alio motu compenſat, adhibita maiore, aut minore ſpirarum diſtra
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ctione. </
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Auguſtin.
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<
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"> Fruſtrà laboras, Antime, vt dierum æqualitatem retineas. </
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Antim.
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Hæc paulò fuſiùs ediſſerere volui, vt intelligatur quonam mo
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do naturaliter vnus motus alio compenſetur, quando ſcilicet impeditur fi
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nis Naturæ. </
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<
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id
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">Finis autem Naturæ eſt primò, vt in connaturali diſtantia
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Sol circa Terram eat; data enim mole vtriuſque globi, dubium non eſt,
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quin prædicta diſtantia poſſit eſſe major, aut minor, connaturali; ſi major,
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cuncta rigerent; ſi minor, conflagrarent omnia; igitur majorem inter &
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minorem connaturalis, ſeu mediocris, aut media definienda eſt; hinc
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manifeſta ratio primæ inclinationis, per quam Sol ab Apogæo ad mediam </
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