112 Trans. Acad. Sci. of St. Louis. 



then (3) will become 



(4) 



E = 



am 



1 + 6i 



The important point to determine now is whether or not 

 our assumptions in regard to the constants <r, G and fi x are 

 realized in actual practice. 



Equation (4) can be arranged as follows 



E , Eb 



— H — a 



ni n 



Let — = x and - = y then 

 ni n J 



x + yb = a 

 is recognized as the equation of a straight line. 



40 



SO 



120 



Fig. 3 

 Series Dynamo Constants Determined when the Speed does not Change. 



