+1 INDACATIO FOCOBVM IN OMKm^S 



/ U 



Efl autcm porro , dcminii cx F in tatv 

 gcnccm perpcndicuhiri FR , ob trianguki lim'li-.i MTP 

 et FTR , MT(/):PM(^)— FT(.vH-w-i--') : RF 

 ( ^'^"^ ■ '^ - ) ; vnde dcducitur fuius anguli R M F =^ m-jt 



>-^-t- - 



f "U 



- , qui erit finus anguli iiKidcntiac. 



§. 6. Ob acqualitAtcm igitur vtriiisque hiiiiis anguli 

 ex phyficis dcliimtam acqiuiks ctiam crunt corum Imus > 

 ex quo hacc obtinetur acquatio : 



I V-f- i — i .y y.x -i-m -t-i 



i u — t V 



Tndc deducitur , fada vtrinque diuifionc pcr f- , ^^*^^^ 

 __ s-^-x^-f ^ ^ ^^j ^ mutatis hisce fymbolis in lincas figurae , 



^|— ^-|, quac proprietas ahqua gcncralis cfl , quam cnr- 

 Ya hacc quacfita tcncrc debct. 



§. 7. Vt autcm calculiis , pmlixifrunus alias , ad com- 

 pendium rcducatur : pono iam j-|-.vzzP, atque x* -^ 

 w*-t-j/* — Q^* , \nde habebimus ex proprictatc pracce^ 

 dcntis paragraphi hanc aequationcm y 



P — m __ P-^-m 



ex qua , membris quadratib , ficfla multiplicationc in m- 

 cem , dcictis tcrminis fc dcftrucntibus , fad.i diuifione pet 

 4;// , ct dcmum cxtnfta nidice , prodit 



* ix 



Eft autcm cx mcthodo tangcnrium leibnlttana j z= — 

 "^Tjy- ; (iibllittitis igititr in hac pracccdcnti aec|uationc ter- 

 minis Icgitimis , ab initio affiimtis , oritur Ivacc acquaiio ; 



