the Goldschmidt l)ynamo. 



763 



of capacity in series so as to raise the frequency in some 

 branches. 



To Antenna. 



-Wh~^t 



Earth 



Diagram to illustrate principles used in the Goldschmidt Dynamo, 

 not any actual arrangements. 



Theory of the Goldschmidt Dynamo. 



The theory as verbally explained in the preceding pages 

 appears to be expressible by the two following equations, 

 subject always to satisfaction of tuning conditions in every 

 circuit so that the self -inductance and capacities neutralise 

 each other throughout. 





, M. d , ,, 



(i) 



(2) 



where x is the current in the rotor, y in the stator, and M is 

 the amplitude of the mutual induction between them, i. e. 

 the value when the poles are opposite each other. At other 

 times the mutual induction is M cos pt. 



And since the currents are variable too, the above equa- 

 tions are justified. They look simple enough, but to solve 



