Guevara, Giovanni di
,
In Aristotelis mechanicas commentarii
,
1627
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<
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145
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ſpectu motus contrarij, vel obliqui, vt eſt motus circularis
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libræ, vel rotæ. </
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<
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<
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N14566
">Rurſumque nec ſubſiſtit contradictio, quam Blancanus
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Philoſopho attribuit, quaſi in præcedenti quæſtione di
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xerit, maiores trochleas, ac ſcytalas, minoribus facilius
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moueri; hic autem aſſerat, maiorem rotam difficilius mo
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ueri, quam minorem. </
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<
s
id
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N14571
">Quandoquidem Ariſtoteles apertè
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per minorem intelligit etiam leuiorem. </
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<
s
id
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N14576
">Ait enim, maius
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autem minore, & leuiore. </
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<
s
id
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N1457B
">Quare ſenſus eſt, quod licet
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rotæ maiores ratione magnitudinis, ſint mobiliores; ni
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hilominus quando grauiores ſunt minoribus, difficilius
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commouentur. </
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</
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<
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<
s
id
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">Ex quibus patere etiam poteſt ſolutio ad rationem
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expan
abbr
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dubi-tãdi
">dubi
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tandi</
expan
>
in principio
<
expan
abbr
="
poſitã
">poſitam</
expan
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. </
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<
s
id
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N14593
">Nam eſtò quolibet perexiguo pon
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dera in
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abbr
="
alterã
">alteram</
expan
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<
expan
abbr
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partẽ
">partem</
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>
adiuncto, vel modico impetu in
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expan
abbr
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illã
">illam</
expan
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in
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cuſſo, re vera tollatur
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expan
abbr
="
æquilibriũ
">æquilibrium</
expan
>
tam leuioris, quàm grauio
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lb
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ris libra, aut rotæ conſideratæ in abſtracto, vt Guidus Vbal
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dus demonſtrat ex principijs Archimedis: id tamen ſenſibi
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liter non apparet in facto, nec propterea libra ipſa, vel rota
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mouetur, niſi exceſſus ponderis, vel impulſus proportionem
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quandam habeat cum grauitate partis oppoſitæ, quam ex
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cedit; ita ut, quo grauior eſt libra, vel rota ſecundum vtran
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que partem in æquilibrio conſtitutam, eo maior ſit ipſe ex
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ceſſus ſuperadditus in altera parte ad alteram ſuperandam.
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</
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<
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id
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">Quod totum procedit ex eo; nam hoc ipſo, quod grauiora
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corpora ægrius præter, vel contra proprium nutum feran
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tur, maior pariter virtus requiritur ad ea circumferenda
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motu præternaturali, ac miſto, prout eſt motus circularis.
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</
s
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<
s
id
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N145C5
">Sed ad concilianda principia Archimedis cum principijs
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Ariſtotelis in propoſito diſcurſu explicandum ſuper eſt, cur
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quando libra, vel rota conſideratur ſuſpenſa per centrum
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ſuæ grauitatis indiuiſibiliter, non requiratur eadem propor
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tio inter exceſſum partis præponderantis, & grauitatem ma
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iorem, aut minorem alterius, ſed ſufficiat quilibet exceſſus.
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</
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<
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id
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">Siquidem etiam in iſto caſu abſtracto maior grauitas partis </
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