Guevara, Giovanni di
,
In Aristotelis mechanicas commentarii
,
1627
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<
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tatione dependeat, ſicut motus rectus progreſſionis neceſ
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ſariò proportionatur motui circulari à quo pendet, ita
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etiam linea deſcripta per talem motum proportionari, &
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adæquari debet lineæ deſcriptæ, ſeu peragratæ per circui
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tionem. </
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<
s
id
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">His itaque ſic ſtabilitis, atque ſuppoſitis tanquam certis,
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& cui dentibus, ad primam partem quæſtionis ſimul, ac dif
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ficultatis propoſitæ reſpondetur, circulum delatum ſemper
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æquale ſpatium, ac circulum deferentem ſuper planum ro
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tando, rectà tranſmittere, ſiue maior eo fuerit, ſiue minor;
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quia illud non tranſmittit ex vi ſuæ rotationis, ac iuxta
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menſuram ſuæ circumferentiæ, ſed ex vi ſui raptus, & aſpor
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tationis. </
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<
s
id
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">Siquidem tantum rectà progreditur, quantum à
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deferente rapitur, & aſportatur, licet aliàs eodem tempore
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maiorem, aut minorem ſimul peragrat circuitum, de quo
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nulla per ſe haberi debet ratio, vt præmonuimus. </
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<
s
id
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">Vnde nec
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requiritur, vt eius motus circumuolutionis ſit æqualis mo
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tui recto, nec vt linea recta, quam percurrit ſit æqualis cir
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cunferentiæ ſecundum quam rotando conuoluitur. </
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<
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id
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">Ad ſecundam verò partem quæſtionis reſpondetur, cir
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culum deferentem, vel alium, qui ſeorſum per ſe ſuper pla
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num circumuoluatur, quò maior ipſe fuerit, maius ſpatium
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rectà in ſua reuolutione percurrere, quò verò minor, minus.
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</
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<
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id
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">Quia cum tota eius progreſſio fiat ex vi propriæ rotationis,
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non niſi æqualem ſuæ peripheriæ lineam in plano poteſt de
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ſcribere; tantum ſcilicet cum ſuo axe rectà progrediendo,
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quantum rotatur; ac tantundem ſpatium percurrendo, quan
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tum fuerit circumuolutus. </
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<
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id
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">Quæ reſponſio ad vtramque
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difficultatis, ſeu quæſtionis partem, eſt omnino ad mentem
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Ariſtotelis, vt patere poteſt ex eius propria, cui hæc maxi
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mè congruit, licet aliunde vim, ac diſtinctionem obtinuerit. </
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<
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">Adhuc tamen ex eiſdem principijs
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reſpõderi
">reſponderi</
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>
poteſt, præ
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fata nos experiri, quia minor circulus quando mouetur ad
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motum alterius maioris motu mixto iam explicato, magis
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participat de latione recta, quàm circulari; citius videlicet
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progrediendo quàm rorando. </
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<
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">Cogitur enim rectà progre-</
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