CORFORVM RTGIDORVM. 235 



qiurc cum fit p p -\- q q -{- rr—i erit 



ricqiic omnia per ternas conlbntes Si, ^, (E funt de- 

 terminata- 



f 4d. lidem valores prodire debent ex tribus 

 Bodris aeqiiationibus, fi etiam quantitates /), r/, r vt 

 variabiles rpcdaiuiir ; pro cafu A — B r:: C j tum 

 autem aequatio prima crit 



—2dri I -cof.4))f^-prfin.(J)}~ s/f^/Cp 



quae ob pdp-\-qdq-\rrcir~o reducitur ad hanc 

 fbrmam : 



I. ^^— - 2 fl'/) fin. Cp4- 2 (1 - cof (p)(r dq -qdr)-2pd(P 



vnde duae rcliquae per analogiam erunt 



II. -^- = - 2 dq fin.(I) + 2 (i - cof.(|))(p</r- rdp)-2qd(^ 



III. ^^^'-^— - 2 ^/r fin. Cp-f 2(1 -Qo{.(^)[qdp-pdq) - 2rd(^ 



atquc iam certi effe poflumus, his aequationibus ali- 

 ter (atisficri non pofle nifi modo ante expofito, quo 

 piq,r fint quantitates conrtantes , angulus vero (J) 

 tempori proportionalis. 



§. 4.7. Ad hoc onendendum eliminemus primo 

 elcmentum d(^ , ac I. ^ — W.p praebet 



fjiAL~^^l_ — -:^(,n.(^l^qdp-pdq)-^dr{i-Qo(.(^) 



SimiliiT;odo II. r — III. ^ dat 



©jj j -c^dt — _ 2 fin.Cp^rrt'?-^?^^-' 2 ^/ Ci - cof (t)) 



G g a quibus 



