CHANGE or ELASTIC COXSTAXTS OF FERROilAGXETICS. Z6 



Tlu* observed values of -.4- are generally small, but are rather 

 greater than those for iron. The elasticity increases by magneti- 

 zation in a manner similar to that of iron. An unconspicuous 

 maxinnim is, however, observed in a high fields. Increased ten- 

 sion decreases the amount of the change ; this makes the feature 

 of the maxinuim conspicuous. The following table and the full 

 lines in Fig. 10 show the results of our experiment. 



TABLE XIV. 



/=io.°2. 



The values of ^7^- as calculated from the tension effect on the 

 change of length differ from the above values rather considerably 

 for sliglit tension ; but they approach each other for high tension, 

 as may be seen in Table XV and the dotted curves in Fig. 10. 

 Here the change of elongation due to tension being very small, 

 the calculated values of -^ are not very certain. 



