334 



HENEY A. EOWLAND 



If now a periodic electromotive force is applied to the terminals A 

 and B the equations connecting the different currents are as below, 

 from which equations the quantity C^C Z cos (fa < 3 ) is to be found, 

 which is proportional to the deflection. From the figure 



"+ -i-V 

 ibc / 



FIG. 8. 



In the same way it is found that 

 0* = i 



FIG. 9. 



Therefore the real part is 



& cos (t, - 0.) = 01 



ibc 



/ rr' 



c 



D, 



