Benedetti, Giovanni Battista de, Io. Baptistae Benedicti ... Diversarvm specvlationvm mathematicarum, et physicarum liber : quarum seriem sequens pagina indicabit ; [annotated and critiqued by Guidobaldo Del Monte]

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407395EPISTOL AE.
Habemus igitur nuncomnems illas conditiones quas Archimedes in præcedenti
propoſitione ſupponit.
Vnde ex rationibus ibi allegatis ſequitur .f.r. eſſe duas quin-
tas ipſius .m.n. hoc eſt ipſius .f.b.
Quapropter punctum .r. centrum erit ponderis to-
tius ſectionis parabolæ ex .8. ſecundi lib. de ponderibus eiuſdem Archimedis.
Inquit nunc Archimedes, quod exiſtente .q. centro ponderis ipſius parabolæ .d.
b.e.
partialis, centrum fruſti erit in linea recta .q.r.f. ita remotum à centro .r. quod
proportio .q.r. ad partem illam ipſius .r.f. quæ reperitur inter centrum .r. & centrum
huius fruſti æqualis eſt proportioni totius parabolæ ad partialem.
Quod quidem ve
rum eſt ex .8. primi libri eiuſdem.
Inquit etiam punctum .i. illud eſſe, eo quod cum probatum ſit .f.r. duas quintas eſ-
ſe ipſius .f.b. ideo .b.r. tres quintas erit ipſius .b.f. vt ipſe dicit.
443[Figure 443]

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