Guevara, Giovanni di
,
In Aristotelis mechanicas commentarii
,
1627
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<
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88
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xlink:href
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005/01/096.jpg
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explicato illo principio; quoniam ſcilicet, quæ plus à cen
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tro diſtat linea, ſeu extremitas ſemidiametri, maiorem de
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ſcribit circumferentiam, quæ ſanè cum magis ad rectam li
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neam accedat, facilius, ac velocius per ipſam fertur ſemidia
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meter, tanquam per viam magis connaturalem, vt ibidem
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explicuimus. </
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<
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<
s
id
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N12A23
">Illud autem, quod Ariſtoteles interpoſuit, nempe: Quod
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igitur motum pondus admouens, longitudo patitur ad lon
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gitudinem: idem eſt, ac dicere, eandem proportionem ha
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bere motricem potentiam ad pondus leuandum, quam ha
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bet eius longitudo, ſeu diſtantia à centro vectis ad longitu
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dinem, ſeu diſtantiam ponderis ab eodem centro vbi eſt
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fulcimentum. </
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<
s
id
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">Quare ſubiungit: Semper autem quanto ab
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hypomochlio, id eſt fulcimento, diſtabit magis, tanto facilius
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mouebit. </
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<
s
id
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N12A39
">Hæc ille, quæ poſtea exactius tradita ſunt ab
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Archimede in ſuo primo libro æqueponderantium propo
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ſitione ſexta; & acutiſſimè probantur à Guido Vbaldo è
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Marchionibus Montis in ſuis Mechanicis tractatu de libra
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propoſitione ſexta; ac de vecte propoſitione quarta. </
s
>
<
s
id
="
N12A44
">De
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lb
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monſtrant enim in æquilibrijs, tàm vectis, quàm libræ, ita ſe
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habere pondus ad pondus, vt brachium ad brachium ex
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commutata proportione. </
s
>
<
s
id
="
N12A4D
">Sit enim vectis, aut libra AB ſuf
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fulta, aut ſuſpenſa in C. </
s
>
<
s
id
="
N12A53
">Brachium autem CA ſit verbi
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xlink:href
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gratia vnius
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palmi. </
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<
s
id
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N12A60
">Bra
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chium verò
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CB ſit qua
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tuor palmo
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rum. </
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<
s
id
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N12A6B
">Dein
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de
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expan
abbr
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appẽda-tur
">appenda
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tur</
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in
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expan
abbr
="
Apõ-dus
">A pon
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dus</
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D, quod
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<
expan
abbr
="
põderet
">ponderet</
expan
>
, vt
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quatuor; &
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in B appen
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datur pondus E, ponderans vt vnum; ita vt ipſum pondus </
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