Fabri, Honoré
,
Dialogi physici in quibus de motu terrae disputatur
,
1665
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tibus aër purior eſt, id eſt, à vaporibus liberior. </
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<
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">Igitur plus ineſt materiæ
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dilatabilis corporibus liquidis prædicto aëri expositis; quid mirum ergo,
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ſi tenſio facilior eſt, multa enim faciliùs tenditur, quàm modica; præterea
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fieri potuit, vt aliquid aëris in tubum irrepſerit; fatetur enim præfatus Au
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tor, quamvis alioquin hoc experimentum ſæpiùs probaverit, vna dumtaxat
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vice à fiſtula aëra exulaſſe: ille autem aër purior faciliùs comprimi & di
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latari poteſt: Hinc ij, qui de rebus Americæ ſcripſerunt, teſtantur, in ver
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tice cujuſdam montis, auram ita tenuem eſſe, vt reſpirationi vix ſerviat;
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in his, vt vides, nulla eſt difficultas. </
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Auguſtin.
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<
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"> Nulla ſanè; ſed cur quæſo ſegmentum IC toties alitudinem
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mutat, nulla temporum habita ratione? </
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<
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">aliquando enim cum Thermome
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tro convenit, ita vt fervente æſtu ſubſidat, & ſæviente bruma aſſurgat, aliàs
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omnino ſecus accidit; vnde hoc quæſo, Antime? </
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Antim.
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<
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"> In alia hypotheſi hoc nullo modo explicari poteſt, in noſtra
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facilè explicatur; nempe pro diverſa ratione auræ purioris, ſeu defæcatio
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nis, cui ſcilicet materiæ dilatabilis plus ineſt, varia eſt ſegmenti extantis al
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titudo; quò enim plùs ineſt prædictæ materiæ, minor eſt, quo minùs, major,
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vt patet ex dictis; plùs autem, vel minùs ineſt, pro diverſo ventorum, ha
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lituum & effluviorum appulſu: porrò diverſæ ſunt combinationes, vt vo
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cant majoris ſcilicet, & minoris quantitatis hujus materiæ; itemque caloris
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& frigoris ambientis; vnde fieri poteſt, vt vnum ab alio minuatur vel au
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geatur. </
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<
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id
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">V.g.major quantitas illius materiæ, cum majore caloris vi acceden
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te conjuncta, brevius ſegmentum extantis Mercurij facit; reliquæ combina
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tiones facilè fieri poſſunt, quare vltro illas omitto, ne ſim fortè prolixior. </
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Chryſocom.
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<
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"> Quid autem cenſes de illa obſervatione, quam præfatus Au
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tor indicat, & de qua Venetiis ſcriptum eſt, ſcilicet æſtu creſcente, ſegmen
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tum extantis Mercurij decreſcere, creſcere verò æſtu decreſcente, an fortè
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aliquid de illa probaſti? </
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Antim.
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<
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"> Si Mercurij extantis ſegmentum à Cylindro aëris ſuſtineretur,
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hoc reverà accidere deberet, iuxta illam noſtram hypotheſim, quam in ſu
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periore congreſſu fusè ſatis tradidimus, vt patet; ſed cùm prædictum ſe
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gmentum ab aëris Cylindro non ſuſtineatur, vt ſupra oſtenſum eſt, æſtus
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maris ad rem hanc nihil facit: vbi autem hæc inaudij, probavi rem accura
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tiſſimè, ſervata fiſtula in ſitu perpendiculari BD eum ſegmento extantis
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Mercurij CI, per totos ferè 30. dies, obſervavi multam mutationem altitu
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dinis; nam Mercurius aliquando ſupra C aſſurgere,
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infra ſubſidere
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mihi, aliiſque, quibus oſtendi, ſæpè ac ſæpiùs viſus eſt, nunquam tamen
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æſtus maris leges ſervavit, ſive diurnas, ita vt momento ſummi æſtus, quo
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Luna eſt in Meridiano, ſubſideret, & momento ſummi receſſus, ſeu reflu
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xus, Luna ſcilicet Meridianum ſextæ horæ occupante, aſſurgeret; ſive leges
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menſtruas, ita vt in Plenilunio & Novilunio ſubſideret, in Quadraturis aſ
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ſurgeret: Idem Florentiæ & Liburni obſervatum fuit, vt à viro ſumma fi
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de digno accepi; quare non eſt, quod multùm curemus de prædicta illa ob
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ſervatione, quæ cum certis experimentis minimè conſentit; quare, ne tem
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pus teramus, profer quæſo, ſi quid fortè reſtat. </
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