Full text: Archimedes: Archimedis De iis qvae vehvntvr in aqva libri dvo

62. FEDERICI COMMANDINI
VRBINATIS LIBER DE CENTRO
GRAVITATIS SOLIDORVM.
DIFFINITIONES.

CEntrvm grauitatis, Pappus
Alexandrinus in octauo ma-
thematicarum collectionum
libro ita diffiniuit.

λέγομεν δἐ κἐντρον βάρ [?] ους ἑκά στου σἀ [?]
ματος {εἶ}ναι σημ\~ειον τικείμενον ἑντὸς, ἀφ [?]
οὖ κα\’τ ἐποίνιαν ἀρτηθέν τό βάρ [?] ος ἡμερ{εἶ}
φερ [?] όμενον, καὶ φυλὰσσει τήν ἐξἀρχ\~νςθἐ-
σιν, οὐ μὴ περιτρ [?] επ ὸμενον ἐντῆ φορ [?] ᾶ. hoc eſt,

Dicimus autem centrum grauitatis uniuſcu-
inſque corporis punctum quoddam intra poſi-
cum, à quo ſi graue appenſum mente concipia-
tur, dum fertur quieſcit; & ſeruat eam, quam in
principio habebat poſitionem: neque in ipſa la-
tione circumuertitur.

Poſſumus etiam hoc modo diffinire.

Centrum grauitatis uniuſcuiuſque ſolidæ figu
ræ eſt punctum illud intra poſitum, circa quod
undique partes æqualium momentorum conſi-
ſtunt. ſi enim per tale centrum ducatur planum
figuram quomodocunque ſecans ſemper in par-

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