Commandino, Federico
,
Liber de centro gravitatis solidorum
,
1565
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medis. </
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<
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s.000294
">ergo punctum
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extra priſma af poſitum,
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centrũ
">centrum</
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erit magnitudinis
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abbr
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cõpoſitæ
">compoſitæ</
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ex omnibus priſmatibus gzr,
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r
<
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t, t
<
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x, x
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grc
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k, k
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grc
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y, yu, us, s
<
foreign
lang
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grc
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h, quod fieri nullo modo po
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lb
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teſt. </
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>
<
s
id
="
s.000295
">eſt enim ex diffinitione centrum grauitatis ſolidæ figu
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lb
/>
ræ intra ipſam poſitum, non extra. </
s
>
<
s
id
="
s.000296
">quare relinquitur, ut
<
expan
abbr
="
cẽtrum
">cen
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lb
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trum</
expan
>
grauitatis priſmatis ſit in linea Km. </
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<
s
id
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s.000297
">Rurſus bc bifa
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lb
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riam in diuidatur: & ducta a
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foreign
lang
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grc
">χ,</
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>
per ipſam, & per lineam
<
lb
/>
agd planum ducatur; quod priſma ſecet:
<
expan
abbr
="
faciatq;
">faciatque</
expan
>
in paral
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lb
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lelogrammo bf ſectionem
<
foreign
lang
="
grc
">χ π</
foreign
>
diuidet punctum
<
foreign
lang
="
grc
">π</
foreign
>
lineam
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lb
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quoque cf bifariam: & erit plani eius, & trianguli ghK
<
lb
/>
communis ſectio gu; quòd
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expan
abbr
="
pũctum
">punctum</
expan
>
u in medio lineæ hK
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lb
/>
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id
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id.023.01.032.1.jpg
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xlink:href
="
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number
="
23
"/>
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lb
/>
poſitum ſit. </
s
>
<
s
id
="
s.000298
">Similiter demonſtrabimus centrum grauita
<
lb
/>
tis priſmatis in ipſa gu ineſſe. </
s
>
<
s
id
="
s.000299
">ſit autem planorum cfnl,
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lb
/>
ad
<
foreign
lang
="
grc
">πχ</
foreign
>
communis ſectio linea
<
foreign
lang
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grc
">ρστ;</
foreign
>
quæ quidem priſmatis
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lb
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axis erit, cum tranſeat per centra grauitatis triangulorum
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lb
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abc, ghk def, ex quartadecima eiuſdem. </
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>
<
s
id
="
s.000300
">ergo centrum
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lb
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grauitatis priſmatis af eſt punctum
<
foreign
lang
="
grc
">ς,</
foreign
>
centrum ſcilicet </
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>
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