Apollonius <Pergaeus>, Apollonii Pergaei Conicorvm Lib. V. VI. VII. paraphraste Abalphato Asphahanensi : nunc primum editi ; additvs in calce Archimedis assvmptorvm liber, ex codibvs arabicis mss Abrahamus Ecchellensis Maronita latinos reddidit, Jo. Alfonsvs Borellvs curam in geometricis versione contulit & [et] notas vberiores in vniuersum opus adiecit

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[381.] Notæ in Propoſit. XV.
[382.] PROPOSITIO XVI.
[383.] PROPOSITIO XVII.
[384.] FINIS.
[385.] Illuſtriſſime, ac Reuerendiſs, Dom.
[386.] Reuerendiſs. Pater Domine.
[387.] REGISTRVM.
[388.] Errata in figuris.
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page |< < (413) of 458 > >|
452413Aſſumpt. Liber. tũ O B, ſiue X S in parabola
526[Figure 526]11Prop. 11.
lib. 1.
æquale eſt rectangulo S FN,
ergo AO ad A C eſt vt qua-
dratum E B ad quadratum
O B, &
propterea parallele-
pipedum, cuius baſis quadra-
tum O B, altitudo O A æ-
quale erit parallelepipedo ba-
ſe quadrato E B, altitudine
A C contento, quod erat
propoſitum.
Ex hiſce propoſitionibus de-
ducit inſuper Eutocius aliqua,
quæ non omnino firma, &
cer-
ta mihi videntur, nam ex eo
quod recta linea vt I X tangit
vtramq;
coniſectionem (hyper-
bolen ſcilicet B X, &
parabo-
len F X) in eodem puncto X
concludit hyperbolen interius
contingere parabolen quàm de-
inceps non ſecat ad eaſdem par-
tes axis illius.
Hoc autem omnino
neceſſarium nõ eſt ex demonſtra-
tis à me in prop.
20. 21. &
22.
Adàit. lib. 6. Apoll. fieri
enim poteſt vt Parabole exte-
rius hyperbolen tangat in X, &

poſtea hinc inde eam ſecet.
Poteſt inſuper hyperbole ſecare eandem parabolam
in eodem puncto X, licet ambo in eodem puncto tangantur ab aliqua recta li-
nea, vt eſt I X;
quod quidem adnotaſſe fuit operepretium.
FINIS.

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