Archimedes, Archimedis De iis qvae vehvntvr in aqva libri dvo

Table of contents

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[31. LEMMAI.]
[32. LEMMA II.]
[33. LEMMA III.]
[34. LEMMA IIII.]
[35. PROPOSITIO VII.]
[36. PROPOSITIO VIII.]
[37. COMMENTARIVS.]
[38. PROPOSITIO IX.]
[39. COMMENTARIVS.]
[40. PROPOSITIO X.]
[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.]
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page |< < of 213 > >|
ARCHIMEDIS
& per conuer-
Figure: /permanent/library/4E7V2WGH/figures/0078-01 not scanned
[Figure 48]
ſionem rationis
ut e b ad e g,
ita f d ad f h.
eſt autem ut a e
ad e b, ita c f
ad f d.
ex æqua
li igitur ut a e
ad e g, ita c f
ad f h.
A_liter_. Aptentur lineæ a b, c d inter ſe ſe, ita ut ad partes
a c angulum faciant;
& ſint a c in uno atque eodem puncto: deinde
iungantur d b, h g, fe.
cum igitur ſit ut a e ad e b, ita c f, hoc eſt
a f ad f d;
æquidiſtabit fe ipſi d b: & ſimiliter h g eidem d b
2. ſexti:æquidiſtabit:
quoniam a h ad h d eſt, ut a g ad g b. ergo f c, h g
30. primiinter ſe ſe æquidiſtant:
& idcirco ut a e ad e g, ita a f; hoc eſt c f ad
fh.
quod demonſtrare oportebat.

LEMMA V.

Sint rurſus duæ portiones ſimiles, contentæ rectis li-
neis, &
rectangulorum conorum ſectionibus, ut in ſupe-
riori figura a b c, cuius diameter b d:
& e f c, cuius
diameter f g:
ducaturque à puncto e linea e h, diame-
tris b d, f g æquidiſtans, quæ ſectionem a b c in _k_ ſe-
cet:
& à puncto c ducatur c h contingens ſectionem
a b c in c conueniensque cumlinea e h in h, quæ ſectio
nem quoque e f c in eodem c puncto continget, ut demon
strabitur.
Dico lineam ductam ab ipſa c h uſque ad ſe-
ctionem e f c, ita ut lineæ e h æquidistet, in eandem pro
portionem diuidi à ſectione a b c;
in quam linea c a à

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