Archimedes, Archimedis De iis qvae vehvntvr in aqva libri dvo

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DE CENTRO GRA VIT. SOLID.
Figure: /permanent/library/4E7V2WGH/figures/0131-01 not scanned
[Figure 87]

THE OREMA VIII. PROPOSITIO VIII.

Cuiuslibet priſmatis, & cuiuslibet cylindri, uel
cylindri portionis grauitatis centrum in medio
ipſius axis conſiſtit.
Sit primum a f priſma æ quidiſtantibus planis contentũ,
quod ſolidum parallelepipedum appellatur:
& oppoſito-
rum planorum c f, a h, d a, f g latera bifariam diuidantur in
punctis k l m n o p q r s t u x:
& per diuiſiones ducantur
plana κ n, o r, s x.
communes autem eorum planorum ſe-
ctiones ſint lineæ y z, θ φ, χ ψ:
quæ in puncto ω conueniãt.
erit ex decima eiuſdem libri Archimedis parallelogrammi
c f centrum grauitatis punctum y;
parallelogrammi a h

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