fupra autem inucnenmiis 



dm — — nd^~vdr\, dfi-md^ — ^dr \ d\L~vd^-\-?idr ; 



dv — — \kd^-\~mdr 

 crit denuo difFeicntiando ; 



ddm~—mdr''{-z\jidrd^--mdQ,* 

 d dn-=z-ndr'+zv drd^-n </^' 

 d d\K — — \i.dr--\- 2mdrd^--ix.d^* 

 ddy——vdr^ +2 ndrd^^v dQ,\ 



f. 14. Cum igitur prima noftrarum fofmularum fit 

 \ -\- X — niX -f- » Y -I- Z fin. i fin. r 

 «"it ftatim bis difFerentiando 



ddx-m(idX-\-nddY-\-ddZCinAfin.r - - - - (I) 

 .V^dXdm-\-'i^dXdn-\ zd7.drC\n.^zof.r - - (II} 

 -{^Xddm-hYddn-ZdrTin.iCia.r (III) 



qwas ternas partes feorfim euoluamus, ac primo quidem 

 erit, vt fupra vidimus 



(]} - - ///'(»iH-«M + Nfin.ifin.r) 

 (II) in haec duo membra refoluitur: 



(II) -^idri-vdX-iLdY-^-dZfm.icof.r) 



-{■zdQi-ndX-^-mdY) 

 zt vcro tertia pars in haec tria membra difcerpitur 



(III) - - +^r*(-wX-^Y-2fin.4fiu.r) 



•i-idrd^iiA.X-vY) 



-{■da^i-mX-nY) 

 fupra autem vidinrius effc : 



-ydX-yidY-^dZiia,icof.r=zdj+(i+x)(dr-^dQcof.i} 



—»d^fia,tfin,r 



