Archimedes, Archimedis De iis qvae vehvntvr in aqva libri dvo

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130FED. COMMANDINI
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.