58 



H I S T O I R E. 



s — s s — s' s — s' s — s s — s' 



BA"^Af;-^BB^^x-^-HBC'"-xAf;-f- -+-BM"*x^!5:,-^BN"'-'-^ 



s-^s^ s—s' s~s S—S' I— s 



CA^"-x.L^,-+-CB'"-x-*^-HCC'"-xi^,-+- H-CM'^x£:i;-HCN"'-x-i^' 



s—s s — s' s — s' s—s' s~~s 



dc' 



DA'\ 'L^,-hDB'^x ^^,^-DC '^x ^^,-^ 



s—s' s—s' s^s' 



LA^^-^/ 



s — s 

 /2 m. a' 

 s~s 



\[A.'\- 



LB^-x-L^,- 



s — s' 



-MB^^x-'"*' 



LC^'x 



s—s' 



s-s' 



+-MC'"-x^, 



NA^^xJLil-+-NB'^-xi^,H-NC-''x.!L£:^ 



s—s 



s—s' 



• • • * 



-DM''x-'L"'_ 



s— s 



;-hdn 



i — 5 



■LM'^-""' 



-MM 



S— I' 

 /2. 771 m' 



LN'*"'" 



X - 



J — y 



s — s 



/2 n m' 



-NM-x:-- 



-MN^^-^ 



s — s 



-NN^^xAiL 



s—s ^- 



La demonftration immcciiate eft deduite des § §. 8. et 

 12., de la meme maniere qnc la propolltion gencrale d\\ ^. $. 

 cfl: dcdnite dcs § §. i. & n.j & partunt il fcroit inutiJe dc 

 la dcvelopper. 



MEMOI- 



