﻿to Illustrate Elastic Hysteresis. 



529 



Fig. 8 shows the model in a configuration corresponding 

 to the neutral condition, whilst fig. 9 shows a state of 



Fig-. 8. 



Fie: 



^ 



o, 



Fig. 10. 



Lai 



^s- 



affairs when slip y has taken place. Fig. 10 gives an 

 enlarged view of one of the two rubbing surfaces of A 2 . 

 It will be seen that the rubbing surface is taken as sym- 

 metrical about an axis 0* perpendicular to the direction of 

 Phil. Mag. S. 6. Vol. 44. No. 261. Sept. 1922. 2 M 



