DelMonte, Guidubaldo
,
In duos Archimedis aequeponderantium libros Paraphrasis : scholijs illustrata
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<
archimedes
>
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<
chap
id
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N10019
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077/01/051.jpg
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47
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tur, ſi appendantur pondera AB ex C, æ〈que〉ponderare. </
s
>
<
s
id
="
N11AB6
">&
<
lb
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è conuerſo, ſi AB pondera ex C æ〈que〉ponderant, ergo C
<
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centrum grauitatis exiſtit. </
s
>
<
s
id
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N11ABC
">ex quibus ſequitur lineam AB,
<
expan
abbr
="
põ
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expan
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lb
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deraquè manere eo modo, quo reperiuntur. </
s
>
<
s
id
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N11AC4
">vt in noſtro me
<
lb
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chanicorum libro in codem tractatu de libra demonſtraui
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lb
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mus, & aduerſus illos, qui aliter ſentiunt, abundè
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diſpu
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tauimus. </
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poſt quar
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tam propo
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ſitionem.
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*</
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<
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"
type
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<
s
id
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N11AEE
">In demonſtratione autem huius quartæ propoſitionis in
<
lb
/>
quit Archimedes.
<
emph
type
="
italics
"/>
Quòd autem ſit in linea AB, præostenſum eſt.
<
emph.end
type
="
italics
"/>
qua
<
lb
/>
ſi dicat Archimedes, ſe priùs oſtendiſſe centrum grauitatis ma
<
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/>
gnitudinis ex AB compoſitæ eſſe in linea AB; quod tamen
<
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in ijs, quæ dicta ſunt, non videtur expreſſum. </
s
>
<
s
id
="
N11AFE
">virtute tamen ſi
<
lb
/>
conſideremus ea, quę in prima, tertiaquè propoſitione dicta
<
lb
/>
ſunt, facilè ex his concludi poteſt, centrum grauitatis magni
<
lb
/>
tudinis ex duabus magnitudinibus compoſitæ eſſe in recta li
<
lb
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nea, quæ ipſarum centra grauitatis coniungit. </
s
>
<
s
id
="
N11B08
">Quare memi
<
lb
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niſſe oportet eorum, quę a nobis in expoſitione primi poſtu
<
lb
/>
lati huius dicta fuere, nempè Archimedem ſupponere, diſtan
<
lb
/>
tias eſſe in vna, eademquè recta linea conſtitutas. </
s
>
<
s
id
="
N11B10
">ideoquè in
<
lb
/>
prima propoſitio nec inquit, Grauia, quę ex
<
expan
abbr
="
diſtãtijs
">diſtantijs</
expan
>
ęquali
<
lb
/>
bus
<
expan
abbr
="
æ〈que〉põderãt
">æ〈que〉ponderant</
expan
>
, æqualia eſſe inter ſe; Archimedes què
<
expan
abbr
="
demõ
">demom</
expan
>
<
lb
/>
ſtrat, quòd quando æ〈que〉ponderant, ſunt æqualia: ex dictis
<
lb
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ſequitur, ſi æ〈que〉ponderant, ergo centrum grauitatis magni
<
lb
/>
tudinis ex ipſis compoſitę erit in eo puncto, vbi æ〈que〉ponde
<
lb
/>
rant; hoc eſt in medio diſtantiarum, lineę ſcilicet, quę
<
expan
abbr
="
grauiũ
">grauium</
expan
>
<
lb
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centra grauitatis coniungit. </
s
>
<
s
id
="
N11B30
">quod idem eſt, ac ſi Archimedes
<
lb
/>
dixiſſet. </
s
>
<
s
id
="
N11B34
">Grauia, quę habent centrum grauitatis in medio li
<
lb
/>
neę, quę magnitudinum centra grauitatis coniungit, ęqua
<
lb
/>
lia ſunt inter ſe. </
s
>
<
s
id
="
N11B3A
">cuius quidem hęc quarta propoſitio videtur
<
lb
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eſſe conuerſa. </
s
>
<
s
id
="
N11B3E
">quamuis Archimedes loco grauium nominet
<
lb
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magnitudines. </
s
>
<
s
id
="
N11B42
">Pręterea in tertia propoſitione, quoniam
<
expan
abbr
="
oſtẽ-dit
">oſten
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lb
/>
dit</
expan
>
Archimedes, inęqualia grauia ę〈que〉ponderare ex
<
expan
abbr
="
diſtãtijs
">diſtantijs</
expan
>
<
lb
/>
inęqualibus, ita vt grauius ſit in minori diſtantia, ſequitur er
<
lb
/>
go centrum grauitatis eſt in eo puncto, vbi æ〈que〉ponderant;
<
lb
/>
& idem eſt, ac ſi dixiſſet, in æqualium grauium centrum gra
<
lb
/>
uitatis eſt in recta linea, quæ ipſorum centra grauitatis con
<
lb
/>
iungit; ita vt ſit propinquius grauiori, remotius uerò leuiori. </
s
>
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</
archimedes
>