— (I50 



ciim s per folam latitudinem (3 expreffum praebet, qvam, ob 

 cius fimpjMcitatem , in iifu geographico , ubi non fumma opus 

 cft exacftitudine, merito iudico anieferendam. 



§.3. Si nempe fupra reperta expreflio ipfius / diffe- 

 rentietur , erit 



^ — ;;; tang (3 3 (3 



dj =3 -J , 



col - jj )/ (^«' -i- tang' p/ 

 ideoqve 



,—-dy w ?) ,3 w 5 (3 



ds:=:i^=: 



fin |3 coP|3 ]/(^m^H-tat)g^^y ]/(;;/ cof-|3-^Iiu-|3/ 



;;;5(3 ;;;5(3 



r ^ " X r,^-il i-Hi(;;r — i)cof'|3 

 [i-f-(;;;-— i)cof*p] ^ ^ ^ 



negleclis nempe poteftatibus ipfius (;;;' — i) alfioribus. Qvo 

 nunc haec expre(rio integrationem admittat , tribuatur eidem 

 haec forma: 



ds = 



m d (3 



I -h i ( w' — I ) — i (^«' — i; fin^ (3 

 ct breuitatis caufa ponatur 



I 4- i ( w- I ) — 5 ^, 1 (»/^ I ) — £ f, 



Kt fiat 



3 j — ,-, "^^''^. „ , et 



Statuatur 



3(3 , 



y + £jjni3)( y — £j?>i|3 ) 2 5"^-' 6' . £jj;i^ -' 6 — £jiw(3' 



s — m r ^P ■ =: ^ r /"—il— -f- /•__iiL„ Y. 



^'^ — 9c', et j-^iL_ n: D .7, ut fit s = ^-L+l} 



KTTjlil^ "' 5 — £j.U|i ' 25" 



Pofito iam 



fin(3z=L^, ut fit cofj3=_LL_, 



fiet 



