(1.7) = 



mit figuram Tcrrae, qiiam ob vim ccntrifiigam rccipcre dcbeC, 

 vbi vt antc cll /— iSp. 



§. lo. Ante omnia liic conflantcm C dcfinirc oportct, 

 id qiiod commodidimc fict transfcrendo pundiim Z in ip(\im 

 K, \bi ficri ncccflc cll ~= i, .v =: o et = 90^, vndc col- 

 ligitur conllans C — ], -h '* ct. Sicquc acquatio pro figura 

 Terruc erit 



o — i -f- 1 a -h '^ — ~ — lct{in.(b% fuie 

 2j n 



r.n 



X X 





fcu quia cof. C|) — * , crit 



^n _ I n X X I n n X X 



= — ' -^ 1/- -^ T^ ' 

 vndc ob z ziz ■/ (x X -\- j j) facilc dcducitur acquatio intcr bi- 

 iias coordinatas x et v. 



§. 10. Ilinc igitur quaeramus fcmi-diamctrum acqua- 

 toris tran«fcrcndo pundum Z in A, vbi crgo lict .vi:i;-CA, 

 cuius proptcrca valor cx hac aequationc clici dcbet 



s" — I -h "^y --\-ia.n. 



Quia vcro nouimus, valorcm ipfiiis z parum ab vnitate difcre- 

 parc^ ponamus z - 1 -h u)., vt liat s" r i -t- « ja ct ss = i n- 2 oj, 

 quibus valoribus iadudis fict oj 1= ' ~^ " L . Sin aurcm hiinc 

 valorcm accuratius dcfideremus, loco s" fcribamus 



1 -t-«(jJ-)-5«C;; — . i)ojw 

 Ct i-r-.co-hww loco zz^ ct noflra acquatio fict 



w -I- U« — i; w 0) zn '-^'-^^-^-^^ -i- i a, 

 \bi cum fit 



