204 Dr. C. Fromme on the Magnetism of Steel Bars. 



sequently the initial moment (UM) increased by that gene- 

 rated by the force. 



TM RM 



A. x . Tm . 



13-32 103600 46*7 



22-82 103800 41-0 



71-31 107800 23-8 



94-65 108700 17-7 



111-2 109100 15-9 



While, therefore, the temporary moments increase more 

 quickly than the magnetizing forces, the residual again in- 

 crease more quickly than the temporary. Hence it follows 

 also that the residual moments increase more rapidly than the 

 magnetizing forces, and according to the product of the ratios 



TM 



and 



RM 



X TM 



If we now collect all the results relating to the temporary 

 magnetism of steel, we find that it increases at first more slowly, 

 then more quickly, and finally (as other observers have already 

 found) again more slowly than does the magnetizing force; 

 consequently a graphic representation of the dependence of 

 the temporary magnetism on the magnetizing force must give 

 a curve of the following^form : — 



TJl 



The two ordinates drawn correspond to the two turning- 

 points of the magnetization. 



[To be continued.] 



