ct quoniam prima conditio dcdit 

 R — "0"r. t-n pjr^ erit 



j p I^Sr. '^o /-^ — nQdty/n. s — n d? fii.s — n fd % cof. t 



lam hi valorcs in reciinda et tertia acquarione fubOituti 

 perducent ad ip(km acquationcm primam ; Vijde patet has 

 tres aequationes vnicac tancum acquinnlcrc. 



§. 26. Sufficit igitur primcim cncduide, quae eft 

 o - 2 Q </ 1 cof. / + ^/Qfin. s -2? i/s fi[].s 4- d P cof. s , 

 vnde pntet akeram quantitatum P ct Q pro lubitu accipi 

 pone. Spein:emus ergo quantitatem P fanquam cognitani 

 ct altcram Q quacramus ex hac acquationc: 



^Qlln.j + ^Q^^ co(. s ~ ^Vds fin. ,. - d? cof. s , 

 qi]ae pcr fin. s mulriphcata integrctur, \nde prodit 



Qfin.j' ~ 2/?d s fin. s' — /^Plin.i cof..T, 

 eft autcm per rcdudionem notifiimam: 



/ ^ P fin. s cof. j - P fin. j cof. s —/? d s (coC. /* — fin. j') , 

 vnde tric 



Qfin. r =:-Pfin..ycof j+/P^j(cof j' + fin. x'} 

 rr - P fin.j cof j -|-/Pi/j, 

 ita vt fit Q--y^-^ -4-^-1;^, hincque porro 



R = - r7^~- -+- " cof s l^, 

 llcquc cx affumta quantitate P binae reliquae Q et R de- 

 terminanturj vnde patet filum infinitis modis in hoc fitu 

 in acquilibrio confiflcrc poffe. 



§. 27. Quando autcm vna trium virium P, Q et 

 R vt cognita fpc(^atur, binac rcliquae multo faciUus ex ea 



X a defi- 



