öo 



K. HONDA. 



shortened by tlie circular magnetization. In weak longitudinal 

 fields, tlie curve of the change of length with a constant circular 

 field lies slightly below the curve with no circular field ; but 

 in strong fields, the first curve lies markedly above the second. 

 The point of intersection of these two curves shifts into a high 

 field as the circular field is increased. The field of the maxi- 

 mum elongation seems to increase with the circular field. 



3. Soft Iron Tube. 



13. The experiments of the change of length by circular 

 magnetization and of the effect of longitudinal field on the 

 change of length led to the following results, which are graphi- 

 cally shown in Fig. 8. The observations were taken at the 

 temperature of 18° C. 



TABLE VI. 



By circular magnetization, the length of the tube diminishes 

 rapidly at first, till it reaches a minimum, then it gradually 



