194 



THE ROYAL SOCIETY OF CANADA 



CÎ ~ 0.9 -^ = too 



i^ = /. /?= / *^= ^o, /3 = 



-f^Q 



//, 



This is not an oscillation : the Secondary current changes sign once 

 only, reaches positive maximum and dies away exponentially. 

 Oscillogram No. 60 is a record of a Double Exponential. 



Case lia. The Primary Current Oscillatory, that is the exponents 

 a and ^ are complex numbers. 



Let a = x — J y 



/9 = x + J y and J = V^ 



