Measurements of Inductance. 



527 



and as initially 



.■B, ft , . P + P' + H, 



it follows that z does not vanish,, and therefore as in § 3 

 there are at least two successive flows through the galva- 

 nometer. 



§ 9. In Carey Foster's comparison of mutual inductance 

 with capacity a continuous balance would hardly be expected. 



u 



1 /?? — > 



K 



L,R 



-0" 



Jl 



A7 



^ + 2 



Z! ) 



owing to the complex nature of the arrangement, 

 equations at short-circuiting are : — 



(L'D + R + R>-MD«-(MD + R)u-L'/=0, 



Rm+{gD 2 + GB)z-(RD+^u--TLf=0, 



MD,r-{(L+^)D + G + r}«-(LD+r)tt-M/=0. 



The 



