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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ARCHIMEDIS

LEMMA II.

Sint duæ portionis ſimiles, contentæ rectis lineis, &
rectangulorum conorum ſectionibus;
a b c quidem ma-
ior, cuius diameter b d;
e f c uero minor, cuius diameter
fg:
aptenturq; inter ſeſe, ita ut maior minorem includat
&
ſint earum baſes a c, e c in eadem recta linea, ut idẽ
punctum c ſit utriuſque terminus:
ſumatur deinde in ſe
ctione a b c quodlibet punctum b:
& iungatur h c. Di
co lineam h c ad partem ſui ipſius, quæ inter c, &
ſe-
ctionem e f c interiicitur, eam proportionẽ habere, quam
habet a c ad c e.
_Dvcatvr_ b c, quæ tranſibit per f. quoniam enim portiones
ſimiles ſunt, diametri cú baſibus æquales continent angulos.
quare
æquidiſtant inter ſe ſe b d, f g:
éſtq; b d ad a c, ut f g ad e c:
& permu-
Figure: /permanent/library/4E7V2WGH/figures/0074-01 not scanned
[Figure 46]
tando b d ad
f g, ut a c ad
c e:
hoc eſt
15. quin-
ti.
ut earum di-
midiæ d c ad
c g.
ergo ex
antecedēti lé
mate ſequi-
tur lineá b c
per punctum
f tranſire.
Ducatur præ
terea à puncto h ad diametrum b d linea h K, æquidiſtans baſi
a c:
& iuncta k c, quæ diametrum f g ſecet in l; per l ducatur

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