4o8 



DE LENTIBVS 



tiira lcntium natam, quae ex huc formula deb;t dc- 

 fiairi 



vbi pro prima lcnte vfurpari dcbent numcrl fiipra 

 iniicati ,|ji., v, ^, cr, r , pro lccunda autem lente ifti 

 jj-', v', ^', a-'^ r' :, iam quia prima kns dcbet vtrin- 

 que eflc aeque conucxa , radius vtriusqnc fiiciei erit 

 rr J,c6p numerns autcm arbitrarius K ita deter- 

 minari debct vt fit 



vnde colligitur 



X zn I, 60024. , 

 pro altcro membro fupputando cfl: 



/^ — o, 1906908 hincque /-^, — o, 136869 



porro 



/B = (-)o, 5X1S834 et /?5=o,i5970o8 ergo 



/B 33 = (-) 0,6715842 

 vnde calculus ita fe habebit 



/33 



— o, 1368694 

 — 0,4791024 



/primac p.zr 9,8897670 

 pars prima-- 0,775 83 



add. ly 



— 0,1368694 



r=9534i23<56 



9,4781060 

 fubtr. /B^=o,67i5 842(-) 



;1. part.fec. — 8, 8o65 2i8(-) 



llpars fecunda =r: 4-0,06405« 



Hinc igirur confnfio ex lente duplicata nata erit 



1,66429-0,77583 >^' 



vnde 



