Archimedes, Archimedis De iis qvae vehvntvr in aqva libri dvo

Table of contents

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[61.] ALEXANDRO FARNESIO CARDINALI AMPLISSIMO ET OPTIMO.
[62.] FEDERICI COMMANDINI VRBINATIS LIBER DE CENTRO GRAVITATIS SOLIDORVM. DIFFINITIONES.
[63.] PETITIONES.
[64.] THEOREMA I. PROPOSITIO I.
[65.] THEOREMA II. PROPOSITIO II.
[66.] THE OREMA III. PROPOSITIO III.
[67.] THE OREMA IIII. PROPOSITIO IIII.
[68.] ALITER.
[69.] THEOREMA V. PROPOSITIO V.
[70.] COROLLARIVM.
[71.] THEOREMA VI. PROPOSITIO VI.
[72.] THE OREMA VII. PROPOSITIO VII.
[73.] THE OREMA VIII. PROPOSITIO VIII.
[74.] THE OREMA IX. PROPOSITIO IX.
[75.] PROBLEMA I. PROPOSITIO X.
[76.] PROBLEMA II. PROPOSITIO XI.
[77.] PROBLEMA III. PROPOSITIO XII.
[78.] PROBLEMA IIII. PROPOSITIO XIII.
[79.] THEOREMA X. PROPOSITIO XIIII.
[80.] THE OREMA XI. PROPOSITIO XV.
[81.] THE OREMA XII. PROPOSITIO XVI.
[82.] THE OREMA XIII. PROPOSITIO XVII.
[83.] THEOREMA XIIII. PROPOSITIO XVIII.
[84.] THEOREMA XV. PROPOSITIO XIX.
[85.] THE OREMA XVI. PROPOSITIO XX.
[86.] THEOREMA XVII. PROPOSITIO XXI.
[87.] THE OREMA XVIII. PROPOSITIO XXII.
[88.] THEOREMA XIX. PROPOSITIO XXIII.
[89.] PROBLEMA V. PROPOSITIO XXIIII.
[90.] THEOREMA XX. PROPOSITIO XXV.
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100ARCHIMEDIS quædam recta linea g i, ſectionibus a g q l, a x d interiecta,
&
ipſi b d æquidiſtans; quæ mediam coni ſectionem in pun
cto h, &
rectam
66[Figure 66] lineam r y in y
ſecet.
demonſtra
bitur g h dupla
h i, quemadmo-
dum demonſtra
ta eſt o g ipſius
g x dupla.
duca-
tur poſtea g ω cõ
tingens a g q l ſe
ctioneming:
&
g c ad b d perpé
dicularis:
iun-
ctaq;
ai produ-
catur ad q.
erit
ergo a i æqualis
i q:
& a q ipſi g ω
æquidiſtans.
Demonſtrandũ eſt portionẽ in humidũ demiſ
fam, inclinatamq;
adeo, ut baſis ipſius non cõtingat humi-
dũ, conſiſtere inclinatã ita, ut axis cum ſuperficie humidi
angulum faciat minorem angulo φ:
& baſis humidi ſuper-
ficiem nullo modo contingat.
Demittatur enim in humi-
dum;
& conſiſtat ita, ut baſis ipſius in uno puncto contin-
gat ſuperficiem humidi.
ſecta autem portione per axem,
plano ad humidi ſuperficiem recto, ſit portionis ſectio a n
z l rectanguli coni ſectio:
ſuperficiei humidi a z: axis autẽ
portionis, &
ſectionis diameter b d: ſeceturq; b d in pun-
ctis _K_ r, ut ſuperius dictum eſt:
& ducatur n f quidem ipſi
a z æquidiſtans, &
contingens coni ſectionem in pũcto n;
n t uero æquidiſtans ipſi b d: & n s ad eandem perpendi-
cularis.
Quoniam igitur portio ad humidum in grauitate,
cam habet proportionem, quam quadratum, quod fit à

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