BABBITT. — THE VON WALTENHOFEN PHENOMENON. 



247 



There is no object in introducing all of the data ; but as a typical ex- 

 ample I select the fourth magnetization curve for B = 7400, Figure 

 13, and give both the data and method of treatment in full. 



Figure 9. Set II: B 6000: eighth magnetization: O indicates 1-step re- 

 versals; X 3-step reversals. 



Typical Set of Data. 



The toroid has been demagnetized by the motor reverser. The 

 process occupied alaout three hours and ended when the current had 

 been reduced to 0.0003 amp. 



The temperature of the room at the beginning was 18.5° C. 



Test op Ballistic Galvanometer. 



