290 



K. HONDA : ON THE MUTUAL INFLUENCE 



times l)v clmngîng the strength of tlie longitudinal cnrrent. 

 Since the deflection is almost instanlanoons, the effect of heating 

 would be negligibly small. 



Three sets of observation for iron wire are given in the 

 following table and in Fig. I. In this and the following figures, 

 curves are drawn through every point obtained by experiments. 



TABLE I. 



IRON WIRE. 



Here H denotes the effective magnetizing field, and ol 

 the change of the intensity of magnetization. Currents are given 

 in ampères. 



The hysteresis attending-cyclic changes of longitudinal cur- 

 rent is shown in Fig. 2. The magnetizing field was C).7 C.G.B. 

 units and the corresponding intensity of magnetization was 

 684 G.G.S. units. When the cyclic state arrived, the initial inten- 

 sity of magnetization increased to 827 C.G.S. units. The 

 strongest current applied was only 35 ampères per square centi- 

 meter so that the effect of heating would be small. 



