470 Prof. T. R. Lyle on 



When both Oj and C 2 are flowing in their respective 

 primaries at the same time, the galvanometer deflexion y will 



Fisr. 1. 



fy Corrwuit&toT* . 

 be the sum of 7! and y 2 produced by C x and C 2 separately; 

 hence 



If now n-i and n 2 are numbers such that 



"1 

 then 



XrT 



w J C 1 + n 2 C 2 = j^7J 



