<)/ Small Resistances, 

 Fig. G. 



E 



39 



H 



H 



■WWVl 



X 



-^AAAAAAr 



V 



t0J 



AAVi/WW 



I 



-WWVWVvJ 



^ 



7^ 



We have 



Hence 

 and 



(??H-.v)V— c = ?nE, 



g{a + n) V + (^ + a + /i)c =gne\ 

 _ //n^ci' •\-gmn{e — E) — ^amE 



(^ + a + ?i) .i' -i- (??z + g) [a + ;i) + mg' 



The sensitivity 





gnex 



[g + a 4- /i).z' + (/H -!- g) [a + //.) + 7ng 



= — o- (say). 



