(i38) ==^ 



(§ <J.5 et per t>iin(?tum K diicntur DE normalis ad IH. Cum» 

 iam omncs Meridiani per polos Q, ^, - tranfeant , fequitur, 

 omnium centra in linea DE efie fita , fi nempe loco ellip- 

 fium fubftituantur circuli ; unde fufficit quaerere pundum M , 

 ubi Meridianus lineam D E fecundum hypothefin elhpticam 

 fecat , ac per punda Q , M , ^ , circulum defcribere. Quem 

 in fincm in aequatione fupra inventa (§. 6.) ponamus ; — ct , 

 ut fiat c ~Aii J.. ili ^ o.r-.- X cii:o'I 



Auu-\-2.mza.u cot. a cof". (3^ — D a a = o. 

 Ex- binis radicibus minor ae pofitiva eft K M. Ergo fit ,,,„ 



'^ '^ ^' ^ u- K M g [/im^ z» coi^. a. c q f*. p^ -f- A Dl — m z coi. a coj^. p^] > 



ubi fi fubfiituantur vaiores-pro a , A et D , erit , -1* n 



»3,-. fj;^ V M q 71^ z4V(Tn.'poi^a co/^fj; -<- m'' ^' — /;rt^P) -;-m pot.a co r.^^] 



quae formu fatis efi proliXa. ' Scripto autem itt quantitate ra- 

 (^icali j-Io^o m" z- fict 



K" TVT " w z co/. p^ [y(TO' co/*. a -t -.i.) ^- m col. a] 



• IV ivi — — , IK^ ■-'f!h^P7~~- ' • . r 



Quantitas radicalis , quae elt — : .. -- . « 



.l'f. ■i/(cofcc\a-4-(w;'— i)cot\ a)z::cot.a-|/(fec'.a'-+-^«*— i), 

 cvoluta fit 



zn cot. a [fec. a -f- 1 (;«* — i) cof a] , 

 undc ob z cof |3' =JK , nancifcimur 



,. 1,, rt w/ r rfec. a -f- 1 (tii' — i) cof. a — wl 



K M zi: — t — ^ ^ _— d . 



tang. a (wr ;is* — fin''. |3 ) 



Si ar=o, acquatio pracbct u~o: ipfa nempc rccfla 

 I H eft proiedio Mcridiani pundi Zcnith. Si vcro a — 90% 

 fit 



