THE THEEMO-ELECTRIC EFFECTS OF LONGITUDINAL STRESS IN IROX. 



Examining the curve (the dotted one in Fig. 13, PL II) in 

 which the result is represented, we see that the maximum point on 

 the "on " branch becomes now barely recognisable, and that the 

 " off" brauch does not go up so straight as usual. The two branches 

 are not only still separated, but also cross each other in such a way 

 that the "off" branch which is for greater loads below the " on," 

 comes out above it for smaller loads. 



Immediately after the above experiment, another cycle (0 — 11—0) 

 was gone through without agitation, and the following readings were 

 obtained : — 



This result is graphically shown in connection with the above in 

 Fig. 13, PI. II. It is apparent that the effects of the hysteresis are 

 immediate and very conspicuous. 



