10 



ART. 9. — H. NAGAÖKA, AND S. KUSAKABE : EFFECT OF 



^ 4. The advantage of the magnetometric over the ballistic 

 method becomes very marked in the observation of the change of 

 magnetization when the field is kept constant and the temperature of 

 the ovoid varied. Several inconveniences of the ballistic method 

 can be avoided by making continuons observations of the magne- 

 tometric deflection. The change of magnetization takes place 



