140 d'ook — Electromagnetic Alternating Currents. 



curves, plotted from the values given in Table lY, are given 

 on Diagram lY and are numbered to correspond to the order 

 in which they are here mentioned. 



Ordinates represent total induction, and abscissae, current 

 densities per sq. mm. 



Diagram IV. 



Curves similar to those given on Diagram lY were taken 

 with the frequency of the alternating current reduced one half. 

 They are given in Table Y, and plotted on Diagram Y. 



