Valerio, Luca - De centro gravitatis solidorum

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1cumque multiplicatione; ſint duæ partes æquales proximæ
baſi DF, FQ: & per puncta FQ duo plana baſium pla
no parallela tres prædictas figuras ſolidas ſecare intelli
gantur: ſecabunt autem & tres figuras per axim, eruntque
ſectiones rectæ lineæ ad diametrum figurarum ordinatim
applicatæ propter
plana ſecantia pa
rallela: trium au
tem ſolidorum ſe
ctiones & baſes
omnes circuli, ter
ni in ſingulis pla
nis: ac primi qui
dem ordinis ſint
ij, quorum diame
tri ſunt baſes trium
figurarum per axim,
trianguli ſcilicet,
parabolæ, & hy
perboles, quæ præ
dictas figuras ſoli
das deſcribunt, re
ctæ lineæ AC,
MN, KL. Se
cundi verò reten
to eodem ordine
figurarum tres αζ,
βε, γδ. Tertij
denique ordinis
SZ, TY, VX.

126[Figure 126]
Quoniam igitur eſt vt EB, ad BD, ità quadratum MD,
ad quadratum DK, ideſt conus MBN, ſi deſcribatur eo
dem vertice B, ad conum KBL. Et vt IB, ad BE, ità eſt
conoides MBN, ad conum MBN, in proportione ſcili-

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