Archimedes
,
Archimedis De insidentibvs aqvae
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LIBER II.
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<
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">SI autem rurſum portio ad humidum in grauitate habens quidem
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proportionem maiorem illa, quam habet tetragonum, quod a, Z, p,
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ad id, quod a, b, d, maiorem autem proportionem, quàm habet tetrago
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num quod ab x, o, ad id, quod a, b, d, Quam autem proportionem ha-
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bet portio ad humidum in grauitate, hanc habet tetragonum, quod a,
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x, ad id, quod a, b, d, palàm igitur, quæ x, o, eſt quidem maior quàm Z,
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p, minor autem quàm x, t, Inaptetur autem inter medio portionum
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apol a, d, æqualis ipſi x, æquedistans autem ipſi b, d, quæf, i, ſecans ſe-
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ctionem inter mediam coni penes y. </
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<
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">Rurſum autem quæ f, y, dupla
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ipſius y, i, demonstrabitur, ſicut quæt, ipſix, y, ut & </
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>
<
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xml:space
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">prius de-
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monstratum est. </
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<
s
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xml:space
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">Ducatur autem a, b, f, ſectionem apol contingens
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quæ f, ***, Similiter autem prioribus demonſtrabitur quæ quidem a, i,
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ipſi q, i, æqualis. </
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<
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xml:space
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">Quæ autem a, q, ipſi f, ***, æquedistans, Demonſtran
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dum autem quòd portio demiſſa in humidum, ita ut baſis ipſius non
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tang at humidum, & </
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<
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xml:space
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">poſita inclinata ita inclinabitur, ut baſis ipſius
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ſecundum ampliorem locum humectetur ab humido. </
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<
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xml:space
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">Demittatur h,
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in humidum, ut dictum eſt. </
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<
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xml:space
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">& </
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<
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xml:space
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">iaceat primo ſic inclinata ut baſis ip-
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ſius neque ſecundum unum tang at ſuper ſiciem humidi. </
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<
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xml:space
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">Secta autem
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ipſa per axem plano recto ad ſuperſiciem humidi, in ſuperſicie quidem
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portionis ſit ſectio, quæ a, b, g, in ſuperficie autem humidi, quæ e, Z, axis
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autem ſectionis. </
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>
<
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xml:space
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">& </
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>
<
s
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xml:space
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">dyametrum portionis ſit quæ b, d, & </
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>
<
s
xml:id
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xml:space
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">ſecetur quæ
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b, d, penes ſignum K, r, Similiter prioribus. </
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>
<
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">ducatur auté & </
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<
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">quæ quidẽ
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h, l, æquediſtanter ipſi e, Z, cõtingens ſectionem a, b, g, penes h, quæ au-
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tem h, t, æquedistanter ipſi b, d. </
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<
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xml:space
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">Quæ autem h, s, perpendicularis ſu-
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per b, d. </
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<
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xml:space
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">Quoniā portio ad humidũ in grauitate proportionem babet
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quam tetragonum, quòd a, x, ad id, quod a, b, d, palàm quod quæ x, eſt
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æqualis ipſi h, t, demonſtrabitur h. </
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<
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xml:space
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">Similiter prioribus, quare & </
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>
<
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xml:space
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">quæ
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h, t, eſt æqualis ipſi f, i, & </
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>
<
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xml:space
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">portiones ergo a, f, q, e, b, Z.</
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ſunt æquales in-
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uicem, quoniam inequalibus, & </
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<
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xml:space
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">ſimilibus portionibus apol a, b, g, ſunt
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productæ, quæ a, q, e, Z, æquales portiones auferentes & </
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>
<
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xml:space
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">hoc quidem
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ab extremitate baſis, hoc autem non ab extremitate minorem faciet
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acutum angulum ad dyametrum portionis quæ ab extremitate baſis
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producta eſt. </
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<
s
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">Et quoniam trigoni h, l, e, angulus eſt maior angulo, ***.
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</
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<
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">palàm quòd minor eſt quæ b, s, quàm b, c. </
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<
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xml:space
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">Quæ autem, s, r,
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maior quàm r, c, & </
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<
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xml:space
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">quæ h, l, maior quàm f, h, quæ a, t, mi-
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nor est quàm h, i, & </
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>
<
s
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xml:space
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">quoniam dupla est quæ f, y, ipſius y, i, palam ꝙ
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quæ h, a, eſt maior, quàm dupla ipſius a, t, ſit igitur quæ h, l, dupla ip-
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ſius l, t, palam autem ex hijs, ꝙ non @manebit portio, ſed inclinabitur
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donec utique baſis ipſius tangat ſecundum unum ſignum ſuperficiem
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humidi. </
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<
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">Tangat autem ſecundum unum ſignum, ut in tertia </
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