Commandino, Federico
,
Liber de centro gravitatis solidorum
,
1565
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023/01/051.jpg
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per 2. pe
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titionem</
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4 Archi
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medis.</
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<
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id
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">Ex demonſtratis perſpicue apparet, portioni
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ſphæræ uel ſphæroidis, quæ dimidia maior eſt,
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abbr
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cẽ
">cen</
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trum grauitatis in axe conſiſtere.</
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<
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id
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">Data enim
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qualibet maio
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lb
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ri
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abbr
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portiõe
">portione</
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, quo
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<
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abbr
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niã
">niam</
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totius ſphæ
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ræ, uel ſphæroi
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dis grauitatis
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centrum eſt in
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axe; eſt autem
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lb
/>
& in axe cen
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lb
/>
trum portio
<
lb
/>
nis minoris:
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lb
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reliquæ portionis uidelicet maioris centrum in axe neceſ
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ſario conſiſtet.</
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<
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">THEOREMA XIII. PROPOSITIO XVII.</
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<
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id
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">Cuiuslibet pyramidis
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abbr
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triãgularem
">trian
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lb
/>
gularem</
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>
baſim
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abbr
="
habẽtis
">habentis</
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>
gra
<
lb
/>
uitatis centrum eſt in pun
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cto, in quo ipſius axes con
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/>
ueniunt.</
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<
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id
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">Sit pyramis, cuius baſis trian
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gulum abc, axis de:
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abbr
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ſitq;
">ſitque</
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>
trian
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guli bdc grauitatis centrum f:
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& iungatur a ſ. </
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>
<
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id
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">erit & af axis eiuſ
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dem pyramidis ex tertia diffini
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tione huius. </
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>
<
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id
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">Itaque quoniam centrum grauitatis eſt in
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axe de; eſt autem & in axe af; q̀uod proxime demonſtraui </
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>
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</
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</
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