«o 



PROPRIETATES 



F -'D{bb-aa)~-aacc{hbaa)-ha^c^-aac*-ac' 

 U-Y ibb'aa)^-aacc{bb -a af -\- a'c'{b b ~ a a) 

 -aac {bb-2.aa)-\- 2a c -aac -ac 

 fubtrahatur infuper a qualibet praecedens per cc mul* 

 tiplicata , reperieturque : 

 "D-^ibb-aa-^-cc^z^-bbcc 

 F -D{bb ■ aa-\-cc)z=:-bbcc{bb aa)-\-abbc' 

 li-f{bb'aa-i-cc)~-bbcc{bb-aay + abbc\bbaa) 



■ aabbc* -\-abbc* 



quae formae per -bbcc diuifae praebent 



B(fcfc — g a -4-cc) — D 



bTTc • — ^ 



^^^—bVT^-— ^bb-aa-aczzB 



f [bb—aa-t-cc) — H /, , \» ^ // 7 \ « t% 



bJTi -{bb -aa) - ac {bb-aa)-aacc- ac - D 



Tbi profcdlo cafu non euenire vidctur, vt primo 

 quidem vnitas, tum vero ipfae litterae B ct D pro- 

 deaat \ pro induftione quidem hinc ft.ibilienda hi 

 duo catus certe minime fufficerent , verum calculo 

 ad fequentem formulam K continuato , nonfolum 

 idem contingit , fed etiam pro fbrmulis ordine im- 

 paribus A, C, E, G deinceps eadem lex progrelTio- 

 nis deprehendetur. Quam ob rem non dubito,huic 

 indudioni innixus pronunciare , fbrmulas has B, D, 

 F, H etc. feriem conftituere recurrentem, cuius fca- 

 la relationis bb-aa-cc y - b b c c , hmzque terminrm 

 antecedentem ipfi izzo refpondentem effe vnitatem. 

 Ita his formulis ita difpofitis : 

 »...0, X, 2, 3, 4, 5, 5, 7 



I , B , D , F , H , K , M , O etc. 



erit 



