Archimedes, Archimedis De iis qvae vehvntvr in aqva libri dvo

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7934DE IIS QVAE VEH. IN AQVA. ſectione e f c diuiditur: pars uero lineæ c a, quæ eſt in-
ter duas ſectiones proportione reſpondebit parti lineæ
ductæ, quæ itidem inter eaſdem ſectiones interiicitur;
hoc
est ut in propoſita figura, ſi producatur d b uſque ad c h
in l, ut ſectioni e f c in puncto m occurrat;
lineam l
b ad b m eãdem proportionem habere, quàm c e ad e a.
Produc. itur enim
49[Figure 49] q f ad eandem lineá
c h in n, ſecás a b c
ſectionem in o:
&
iuncta b c, quæ tran
ſibit per f, ut oſten-
ſum eſt, erunt trian-
gula c g f, c d b ſi-
milia:
itémq; ſimi-
lia íter ſe, c f n, c b l.
quare ut g f ad d b,
114. ſexti: ita erit c f ad c b:
& ut c f ad c b, ita
f n ad b l.
ergo g f
2211. quinti ad d b, ut f n ad b l:
& permutando g f
ad f n, ut d b ad b l.

eſt autem d b æqua
lis ipſi b l ex trigeſi
maquinta primi li-
3314. quinti bri conicorum.
ergo
&
g f ipſi p i æqua
lis erit:
& ex trige
ſimatertia eiuſdem
linea c h ſectionem
e f c in eodem

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