IN ARTE CONIECTANDI. 89 



ftitutis, pono vnam infupcr fchcdulam extrahi, ita 

 vt fiiu numcrus fchcduhirum in vrna refiduarum 

 zzf—i; po(}rema iila fchcdula extra(fla aut erit dc 

 claflc folitariarum, aut de clafle coniugatarum de- 

 promta i Ced numerus cafuum pro euentu priori 

 ftci^ntium cfl: rrr— i.v, pro poflcriori autem euea- 

 tu uia.v; fi prius eucncrit , crit numerus parium 

 fupcrrtitum etiamnum izi.v; fi poftcrius , numerus 

 ifte vnitatc dccrcfcct ; multipliccntur itaque , pro 

 regula fundamcntali in arte coniecflandi , praLfliti 

 valorcs .v ct .v— i pcr numcrum cafuum rcfpondcn- 

 tem, produ<florumque fumma diuidatur per fummam 

 cafuum , quo ftdo habcbimus '-^^^^^^ ''"j!"''''''" ^' aut 

 fimplicitcr x--'-^ : hacc vltima formula nos docct , 

 quauis noua extradione fchedulae , numcrum parium 

 in vrna fupcrftitum diminui quantitate "-jt. 



Facilc nunc eft , ad normam pracfati lemma- 

 tis , valorcs fucccfliuos quantitatis x ab initio vsque 

 ad fincm dcfinirc , poncudo fucccfliue pro r nume- 

 ros 2U; 2«—!; 2«— 2; 2«— 3; 2« — 4;2«— 5etc. 

 quia enim flatim ab initio eft x~n, crit poft pri- 

 mam fchedulae cxtradionem x — n—i: poft ffrun- 



1 r^ 2(1-') /:„-. (zn-zXln-z) 



dam cxtradionem .vz:«-i--„— "UC -^ — ~_^^ ; 



pofl tcrtiam cxtrnaionem x zz^^-^^^l-^^-^^'^ pofl: 



quartam .v — '^-^ ^ -? ~ * ' ^'-^^- Ex fuccefllone 

 horum valorum intelligitur poft (2;/— r) tam ex- 

 tradioacm , id efl , totics rcpetitam quoties vnitas 

 coMtin:tur in 2« — r, fore .vn-T-^— . Q. E I. 

 Toin.Xll.Nou.Comm, M §. 3- 



