Archimedes, Archimedis De iis qvae vehvntvr in aqva libri dvo

Table of contents

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[41.] COMMENTARIVS.
[42.] LEMMA I.
[43.] LEMMA II.
[44.] LEMMA III.
[45.] LEMMA IIII.
[46.] LEMMA V.
[47.] LEMMA VI.
[48.] II.
[49.] III.
[50.] IIII.
[51.] V.
[52.] DEMONSTRATIO SECVNDAE PARTIS.
[53.] COMMENTARIVS.
[54.] DEMONSTRATIO TERTIAE PARTIS.
[55.] COMMENTARIVS.
[56.] DEMONSTRATIO QVARTAE PARTIS.
[57.] DEMONSTRATIO QVINT AE PARTIS.
[58.] FINIS LIBRORVM ARCHIMEDIS DE IIS, QVAE IN AQVA VEHVNTVR.
[59.] FEDERICI COMMANDINI VRBINATIS LIBER DE CENTRO GRAVITATIS SOLIDORV M.
[60.] CVM PRIVILEGIO IN ANNOS X. BONONIAE, Ex Officina Alexandri Benacii. M D LXV.
[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.
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98ARCHIMEDIS ſuperficiem recto, ſit portionis ſectio anzg; ſuperficiei
humidi ez:
a-
64[Figure 64] xis portionis,
&
ſectionis dia-
meter b d:
ſece-
turq, b d in pũ-
ctis _K_r, ſicuti
prius;
& duca-
tur n l quidem
ipſi e z æquidi-
ſtans, quæ con-
tingat ſectionẽ
a n z g in n;
&
n t æquidiſtans
ipſi b d;
n s ue-
ro ad b d perpẽ
dicularis.
Itaq;
quoniam portio ad humidum in grauitate eam proportio
nem habet, quam quadratum, quod fit à linea ψ ad quadra
tum b d:
erit ψ ipſi n t æqualis: quod ſimiliter demonſtrabi
tur, ut ſuperius.
quare & n t eſt æqualis ipſi u i. portiones
igitur a u q, e n z inter ſe ſunt æquales.
Et cum in æquali-
bus, &
ſimilibus portionibus a u q l, a n z g ductæ ſint a q
e z, quæ æquales portiones auferunt;
illa quidem ab extre
mitate baſis;
hæc autem non ab extremitate: minorem fa-
ciet acutum angulum cum portionis diametro, quæ ab ex-
tremitate baſis ducitur.
At triangulorum n l s, u ω c angu
lus ad l angulo ad ω maior eſt.
ergo b s minor erit, quam
b c:
& ſ r maior, quàm c r: ideoq; n χ maior, quam u h; &
χ t minor, quàm h i.
Quoniam igitur u y dupla eſt ipſius
y i;
conſtat n χ maiorem eſſe, quàm duplã χ t. Sit n m dupla
ipſius m t.
perſpicuũ eſt ex iis, quæ dicta ſunt, non manere
portionẽ;
ſed in clinari, donec eius baſis contingat ſuperfi-
ciem humidi:
contingat autem in puncto uno, ut patet in

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