xS HI riltl |KJtfi 





-i . (29), and (30) are of the croeral form 

 5 - O- Jl, - // M. 



then l:it<- .-! \ anatlMli 1- 





*(>.- if.) 



1 // are thr r,M-l!in,-i,t .1 ct|uatioiif .'1 



:ml (30), re|MM-ti\rl\ 



\N boo N in It'iiiHila- Jl .- a maximum, 



/ I * \ 



(//" " ) !<**! thrciunh zero. 



Art. U. Kifiiimlenl L'mf 



j.u -/,- 



'/ 1,1, I 





(' -i ' ) 



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