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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[111.] Notæ in Propoſit. LXXII.
[112.] SECTIO DECIMAQVARTA Continens Propoſ. LXXIII. LXXIV. LXXV. LXXVI. & LXXVII. PROPOSITIO LXXIII.
[113.] PROPOSITO LXXIV.
[114.] PROPOSITO LXXV.
[115.] PROPOSITIO LXXVI.
[116.] PROPOSITIO LXXVII.
[117.] Notæ in Propoſit. LXXIII.
[118.] LEMMA XII.
[119.] Notæ in Propoſ. LXXIV.
[120.] Notæ in Propoſit. LXXV.
[121.] Notæ in Propoſ. LXXVI.
[122.] Notæ in Propoſit. LXXVII.
[123.] COROLLARIVM.
[124.] SECTIO DECIMAQVINTA Continens Propoſ. XXXXI. XXXXII. XXXXIII. Apollonij. PROPOSITIO XXXXI.
[125.] PROPOSITO XXXXII.
[126.] PROPOSITIO XXXXIII.
[127.] Notæ in Propoſ. XXXXI.
[128.] Notæ in Propoſ. XXXXII.
[129.] Notæ in Propoſit. XXXXIII.
[130.] SECTIO DECIMASEXTA Continens XVI. XVII. XVIII. Propoſ. Apollonij.
[131.] Notæ in Propoſit. XVI. XVII. XVIII.
[132.] SECTIO DECIMASEPTIMA Continens XIX. XX. XXI. XXII. XXIII. XXIV. & XXV. Propoſ. Apollonij. PROPOSITIO XIX.
[133.] PROPOSITIO XX. XXI. & XXII.
[134.] PROPOSITIO XXIII. & XXIV.
[135.] PROPOSITIO XXV.
[136.] Notæ in Propoſit. XIX.
[137.] Notæ in Propoſit. XX. XXI. XXII.
[138.] Notæ in Propoſ. XXIII. XXIV.
[139.] Notæ in Propoſ. XXXV.
[140.] SECTIO DECIMAOCTAVA Continens XXXII. XXXIII. XXXIV. XXXV. XXXVI. XXXVII. XXXVIII. XXXIX. XXXX. XXXXVII. XXXXVIII. Propoſit. Apollonij. PROPOSITIO XXXII.
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page |< < (129) of 458 > >|
167129Conicor. Lib. V.
PROPOSITIO XXXXVIII.
T Res lineæ maximæ E F, G H,
11a164[Figure 164] I K ad vnum ellipſis quadrã-
tem A F B cadentens non cõueniunt
in vno puncto.
Alioquin cõueniant in O, & quia ſunt
lineæ maximæ erunt M K, H N, L F, li-
neæ breuiſſimæ (32.
ex 5.) & conueniunt
in puncto O;
quod eſt abſurdũ (54. ex 5.)
oſtenſum ergo eſt, quod fuerat propoſitũ.
Notæ in Propoſit. XXXII.
L Inea maxima ſecat tranſuerſam in pũ-
22a165[Figure 165] cto, cuius intercepta inter punctum
illud, &
ſectionem, eſt linea breuiſſima,
&
c. Verba, quæ in textu Arabico deſideran-
tur ſupplenda cenſui, vt æquiuocationes tolle-
rentur.
Quia G H eſt linea maxima, erit D A
33b ad A F, nempe B E ad B D, &
c. Quia
in 22.
huius oſtenſum eſt, lineæ maximæ G
H potentialem H O ſecare ſemiaxim minorẽ
A D in O, vt ſit D O ad O G in eadẽ propor-
tione figuræ axis minoris A C;
ſcilicet erit,
vt D A ſemiaxis minor ad A F eius ſemie-
rectum;
ſed vt A D ad A F, ita eſt B E ſe-
miſsis lateris recti axis tranſuerſi ad B D
ſemiſſem eiuſdem tranſuerſi;
igitur D O ad
O G eandem proportionem habebit, quàm E
B ad B D;
ſed propter parallelas N D, H O,
eſt N H ad H G, vt D O ad O G;
pariter-
que propter parallelas D G, H P, erit N P ad P D, vt N H ad H G;
& pro-
pterea N P ad P D eandem proportionem habebit, quàm D O ad O G, ſeu
quàm E B ad B D;
& permutando D P ad P N erit, vt D B ad B E, ſeu vt
4415. huius. axis tranſuerſus ad eius, erectum;
& propterea linea N H erit breuiſsima.
Notæ in Propoſit. XXXIII. XXXIV.
E Contra oſtendetur, quod duæ breuiſſimæ, ſi educantur ex parte ſuæ
55a originis ad rectum, fient duo maximi cum relatione ad rectum:

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