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ne rata Iq ura Sphjeroides centro c, circumabhi eilipfeos cujus femiaxes cb, ce, circa axem ab, ge- Segment,Ejct r ^’ ^cari intelligatur quatuor planis. Quorum tribus politione datis, fit quartum mobile. Sphjeroid,quocj p Us politione datis, duo per centrum transeant ; atque horum alterum quidem per axem ab,
Ver b ' 'E er ^ c * cm Ipha-roideos fecando elliplin effecerit generanti fimilem et aequalem. Alterum^°d fij U °b us P er centrum, illud ipliim fit, super quo axis ab ad perpendiculum eft erectus;
^Xeuj P er ficiem fecando circulum effecerit, illum ipsum utique quem planetae spheroideos, circaPolitio^ Ver Eatilis, Aftronomi Arquinodlialem vocarent. Cum hoc vero reliquum ex planis tribusEdlicgf 116 ^ at ' 3 parallelum fit ; ut, superficiem fecando, illud etiam circulum efficiat, minoremgiiUn s ’ CUm ^quino&iali parallelum. Quartum denique ex iis quibus fphaeroidem secari intelli-e ft, f e ’^ l0 d mobile pofuimus, ea quidem lege fit mobile, ut cum illo, quod per axem ab duftumr t>i(l eos , ? er P ara ll e lum maneat. Ex quo fiet, ut quocunque loco id confiftat, fuperficiem fphse-^^ an tii s e ^ nd0 ’ Ehipfin effecerit, magnitudine quidem in aliis a centro figura? fpharoideosa ham, specie verb generantis femper fimilem. Hifce politis, magnitudinem segmenti
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