C. Bar us — Apparent Hysteresis. 



103 



of the magnetized wire in the initial magnetization. As this 

 is the important result I will again record the successive scale 

 readings as shown bj the zigzag lines c, with the subscript 

 referring to the figure. It is- not necessary to give more than 

 four observations for each twist since all subsequent elonga- 

 tions are like the second in magnitude. For the first and 

 third points the field is off, for the second and fourth it is on. 





If the twist be positive (shown by the attached sign), an 

 increased scale reading denotes increased rigidity of the mag- 

 netized wire, and vice versa. 



It is preferable to discuss these results in connection with 

 figures 8-11, for a larger field ((7=4 amperes) and twists 



