S.prim. Eucl; qui acutos ut A F & B E , tandem convenient in aliquo punctofcil, u per 13. axio. lib. i.Eucl. & ulterius protradti interfecant fefe in diclo pun-clo I. per II axio.ejusdem. Qui vero obtufos ut AG & BH feinper magis abinvicem difcedent:quia non poffunt aequidiftare… … Corol- SyntAgma II Gaput II o Q Corollariurn 4 *7 Si kaque in medib repletolumine aftumatur quodcunquepunccum,reperi«»kmtur in illo unici vertices duorum radioibrum conorum vel Pyramidum , quo-rum unifs baiim habet in corpore luroinofo, appellaturque conus rettus, alterin corpore poiito poft illud…
Optics, Geometrical · Optical instruments
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