Fabri, Honoré
,
Dialogi physici in quibus de motu terrae disputatur
,
1665
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rum diſtat? </
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<
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id
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s.001169
">cur ſi aëris portio modica ſit, etiam ima baſis convexa eſt?
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</
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<
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id
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">cur major aëris portio tardiùs, minor citiùs aſcendit? </
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<
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">imò ſi
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idẽ
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tubus inæ
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qualis ſit, per ſegmentum anguſtius tardiùs aër incedit, citiùs per laxius;
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quia in anguſtiore aër in longiorem cylindrum producitur; cur ille tre
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mulus motus Lentium aëris? </
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<
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id
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s.001172
">Cur figura Lentis, non Sphæræ? </
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<
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id
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s.001173
">cur in tubo in
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clinato longior eſt convexitas aëris versùs latus interius, versùs ſuperius,
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brevior. </
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<
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id
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">Cuncta hæc explicari non poſſunt, ſi aër ſurſum ſua ſponte aſcen
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dit; ſcire tamen velim, cur eadem aëris portio in tubo anguſtiore tardiùs,
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in laxiore citiùs aſcendat. </
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Antim.
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<
s
id
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"> Miror à te rationem non videri; in anguſtiore tubo aëris por
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tio in cylindrum longiorem formatur; igitur aqua per latera deſcen
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dens longius ſpatium decurrere debet, antequam cum aqua inferiore
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conjungatur, & aëra ſurſum extrudat; igitur in eo plus temporis
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ponit. </
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Auguſtin.
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<
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id
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"> Satis eſt, rem intelligo, vnde etiam perſpicua ratio ducitur,
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cur modica portio aëris in eodem tubo citiùs aſcendat, quàm major, quia
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hæc in longiorem cylindrum extenditur; quid mirum ergo, ſi tardiùs aſ
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cendat? </
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Chryſocom.
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<
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"> Infunde, quæſo te, in tubum aliquid olei; multa enim vi
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debis, quæ tibi fortè oppoſitum perſuadeant: primo enim oleum tar
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diùs aſſurgit, quia longè gravius eſt aëre. </
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<
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id
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">Secundo eandem figuram induit
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quam Aër, tertio Aëris cylindrus per medium oleum citiſſimè ſurſum per
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rumpit: quartò Aër nonnunquam oleum ſecum longè citiùs rapit, quàm
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Oleum per ſe ipſum aſſurgeret; nihil horum explicari poteſt, niſi dicamus,
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aëra ſurſum ſua ſponte ferri. </
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Auguſtin.
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<
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"> Immo nihil horum explicari poteſt, ſi hoc dicamus; primò
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igitur Aër citiùs fertur, tardiùs Oleum, cæteris paribus quia aliquando
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accidit, vt modica olei portio ſurſum citiùs avolet; tardiùs aurem æqua
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lis portio; quia minus eſt aquæ momentum adversùs gravitatem, ſeu pon
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dus olei, & majus adversùs pondus aëris. </
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<
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id
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">Secundo de figura nihil adden
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dum eſſe puto; niſi quòd inferior baſis niſi longior ſit olei cylindras, con
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vexa eſt. </
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<
s
id
="
s.001185
">Tertio vbi aëris cylindrus ad cylindrum aëris pervenit, ſtatim
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deſcendit Oleum, in libero ſcilicet aëre, & ab aquæ lapſu circumagitur
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in mille orbes & ſpiras; & verò Oleum in aëre poſitum ſua ſponte citò
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deſcendere, mirum non eſt. </
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>
<
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id
="
s.001186
">Quarto Aëris bulla aliquando ſupremo cylin
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dro olei adhæret, & tunc citiùs aſſurgit; quia ſcilicet totum illud per
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modum vnius attollitur; neque in hoc eſt difficultas; Supponamus enim,
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eſſe vnciam aëris, & vnciam olei; certè major eſt proportio momenti
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duarum vnciarum aquæ adversùs pondus aggregati, ex vna vncia
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olei, & vna aëris, quàm vnius vnciæ aquæ, adverſus vnam
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Olei; nec obſtar aggregatum illud eſſe gravius alterutro; quia in
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comparatione duorum gravium, æqualis ſemper vtriuſque extenſio,
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ſeu moles accipitur. </
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<
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id
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">Sed hæc ſunt facilia, nec in his explicandis tua
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opera indigeo, Antime; in his tamen non dubito, quin alia multa à </
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