WRPAS ISOTERIMETRAS Ocl sf 



eflent abiturae cafu pzzo , ita vt curuae intra datos 

 termmos in infinitum excurrent ; quare pro V eiusn o- 

 di formulas accipi oportet, vt nullo cafu, vel ip(a for- 

 mula V, vel eius differentialia in infinitum abeanfc. 

 Sit ergo 



VT> —i— c p t_ 



= (r^>F entqne 



___ 4 ip^-cUj- . pp) 



__J*V — _(♦ — 2opp )— c( 1 2 ft— , a p*) 



Ap* — (, _ + _ i ,p)* 



hincque pro conftructione curuarum fequentes obtine- 

 buntur formulae : 



x — ________ — * ?1 ('— ??£) — ? c _ h — pj>) 



** — yi. -+- pp) 7 -"- 



f, =+-/>_>)- 



V — ______ _. J2 £ ft S — ■ c(, -f- 7 ftft — . g j,*) 



•^ V(< -H__) s 



( r -4- pp)i 



/"____ __1__J ) ____- c _i___r * PfO 



J — J >-+-PP (--t-pp) 2 



Omnes hae curuae etiam diametro normaliter infiftent, 

 atque fi fit b~ 0, earum applicatae maximae in cen- 

 trum circuli cadent , quia pofito p _= fit x — ; ap- 

 plicata autem maxima erit zza-\-c, atque ad vtram- 

 que partem curuae erunt fibi fimiles. Hae ergo curuae 

 prae ceteris notatu dignae ex his formulis conftruentur: 

 — ______ SfPj^sPP) 



x -y { i+pp) . (n-#>)i 



a e(i -h-jpp~6p*) 



y - vU+m + I^ppY" vnde €rit 



s -_ r-f^?- _ __?_LT_____ 

 7 1 -*-/»/> ~ U +/>p) 2 



E a Hine 



