" English Silvek Steel." 



-Effect of Mechanical Hardening 



d (" Pulled"). LENGTH=100mra. - 



m. =139. 



Diameter 

 7*"" Sp.mag. T "Tflic r tioQ PaSS M fo?ce 



The results are graphically represented in figs. 2 and 3 on 

 the following page. 



- - n pare the curves (Fig. II), repre- 



n 'ron as 



to be 



xpected, that the mechanical hardening to some extent hinders 

 the turning of the molecules by the magnetic force. Prom the 

 curves (Fig. I), representing the permanent specific magnetism 

 of steel we see, that, where the quotient (=r\ is greater than 



(a ), the softer magnet has the advantage, without reference to 

 the intensity of the magnetizing force. If on the other hand 

 (~\ is less than (a ) (Fig. Ill), the softer magnet has the advan- 

 tage up to a certain value of the magnetizing force, when the 

 specific magnetism of the harder magnet overtakes that of the 

 softer, and is ahead at ' 



