262 



Major K. L. Hippisley. 



If there is magnetic leakage it is necessary to discriminate between 

 the H, of the. primary core, and the v H of the secondary core; these 

 are respectiv^y 



E 



MS sjn (t 



derive^ respectively frpm H! = (Laj+.M#),andH 2 = 



(19), 



(20), 



where x = 



sn ?f- 



,'.... (21), 



EjomM cos (ptifr) 

 y= -^- ^ vr - 



(22). 



In these equations N is the self-indiiqtipn of the secondary, M is 

 the mutual induction, F is the radicle in the denominator of (19) and 



tan ty = p,m 



tan e = 



z= 



_ 



<-M 2 ;} 



- V{ (NR-LS) 2 + 4R SM 2 } 

 2m(LN M 2 ) 



2m(LN-M 2 ) 



er, 1892.] 



