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

SIT cylindrus, uel cylindri po rtio a c: & plano per a-
xem ducto ſecetur; cuius ſectio ſit parallelogrammum a b
c d: & bifariam diuiſis a d, b c parallelogrammi lateribus,
per diuiſionum puncta e f planum baſi æquidiſtans duca-
tur; quod faciet ſectionem, in cy lindro quidem circulum
æqualem iis, qui ſunt in baſibus, ut demonſtrauit Serenus
in libro cylindricorum, propoſitione quinta: in cylindri
uero portione ellipſim æqualem, & ſimilem eis, quæ ſunt
in oppoſitis planis, quod nos
demonſtrauimus in commen
tariis in librum Archimedis
de conoidibus, & ſphæroidi-
bus. Dico centrum grauita-
tis cylindri, uel cylindri por-
tionis eſſe in plano e f. Si enĩ
fieri poteſt, fit centrum g: & ducatur g h ipſi a d æquidi-
ſtans, uſque ad e f planum. Itaque linea a e continenter
diuiſa bifariam, erit tandem
pars aliqua ipſius k e, minor
g h. Diuidantur ergo lineæ
a e, e d in partes æquales ipſi
k e: & per diuiſiones plana ba
ſibus æquidiſtantia ducãtur. erunt iam ſectiones, figuræ æ-
quales, & ſimiles eis, quæ ſunt
in baſibus: atque erit cylindrus in cylindros diuiſus: & cy
lindri portio in portiones æquales, & ſimiles ipſi k f. reli-
qua ſimiliter, ut ſuperius in priſmate concludentur.

72.1.

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