ii.i6 



D E M O T V 



fc pcrnnitabil-ia , tnntiim opus erit , \t tnm anguU 

 ^, -y), S-, quaiii a, (3, y (ccundum ordincm promo- 

 vcnntur , dum interea nngulus Cj) idcm conferua- 

 tiir, IIoc igitur modo rcpcricmus fcqucntcs expres- 

 fioncs 



cor.Bsrzcof. v)(cof.(3M nn.p'cof.(J^)-hco(3rcor|3cor.Y. 



— co(.j3co(.YCol.Cp — co(,afin.4);-i cu(.^(coi.pco(,ct 



— cof. pcof. a cof Cp-f- co{.yC\t),(p) 



cof. Cs^cof. 3- (cof. y'4 fin. y' C(i(. Cp)-fcor <^(cor'y cof a 



— cof. Y cof. a cof> (f) — co(. (3 fi n . <$>; 4- cof. •>) ,cof.Y coi.^ 

 — cof. V cof p cof. C|)-h cof. a fin. Cp), 



§. 1 3. Statunmiis nunc brcuitatis gratia pro 

 fitii trnnblato pundi Z 



- ex qnoriim \nloribns coordinatne pro ifto pundo dcin- 

 ceps formabuntur, Cofinus cri^o horum trium ar- 

 cuum hic iundlim aipedui cxponnmus 



cor.^'z:cor^(cofa'-ifin.a'cof.CpH-cof.Vcof.aco(.p(i— cof.Cp)— cofYfin.Cp) 

 -i-cofS-(cof.acol.Y(i— cof.CpJH-col pfin.Cp) 



co(:V=coI.>]^cof.p'-frin]3'co(.C|:'H-coi.3(col.pco(.Y(i — cof.Cp)— cor.afin.(I)) 

 -f-cof ^(coCacc f p(i -co(,Cf:)-hcofYfin.CD} 



cof.S'-cofS-(c()i;Y'-|-fin.Y\ofCl)>4co(.^(cn(acoi.Y(i-cof,Cp)-cof:|3fin.Cp) 

 • co(. '0 (cof p col.y ( I — cof (p) -\- cof a fin. Cp). 



§. 14. Opcrnc prefium Ivc erit nonnnllos fi- 

 tue principnks puntfti Z contcmplnri. Sumamus 

 igitur primo pUKftum Z in ip(o purdo A, ita vt 

 fit <^no ct 71 - :& — 5)0°i vnde pro fitu pundis 



Ciit 



cof 



