Archimedes
,
Archimedis De iis qvae vehvntvr in aqva libri dvo
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DE CENTRO GRAVIT. SOLID.
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ſimiliter demonſtrabitur totius priſmatis a _K_ grauitatis eſ
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ſe centrum. </
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<
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xml:space
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<
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idem ſacile demonſtrabitur. </
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<
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">Quo autem pacto in omni
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figura rectilinea centrum grauitatis inueniatur, do cuimus
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in commentariis in ſextam propoſitionem Archimedis de
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quadratura parabolæ.</
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<
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</
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<
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<
s
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">Sit cylindrus, uel cylindri portio c e cuius axis a b: </
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<
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<
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turq, plano per axem ducto; </
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<
s
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xml:space
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">quod ſectionem faciat paral-
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lelo grammum c d e f: </
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<
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xml:space
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<
s
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">diuiſis c f, d e bifariam in punctis
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http://echo.mpiwg-berlin.mpg.de/zogilib?fn=/permanent/library/4E7V2WGH/figures/0139-01
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g h, per ea ducatur planum baſi æquidiſtans. </
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<
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">erit ſectio g h
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circulus, uel ellipſis, centrum habens in axe; </
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<
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que erunt ex iis, quæ demonſtrauimus, centra grauitatis
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planorum oppoſitorum puncta a b: </
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<
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xml:space
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<
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xml:space
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<
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xml:space
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<
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quo quidem plano eſt centrum grauitatis cylindri, uel cy-
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lindri portionis. </
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<
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">Dico punctum K cylindri quoque, uel cy
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lindri portionis grauitatis centrum eſſe. </
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<
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teſt, ſitl centrum: </
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<
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ducatur. </
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<
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