SHUDDEMAGEN. — DEMAGNETIZING FACTORS FOR IRON RODS. 213 



applied field H' in the solenoid can be found by multiplying by 

 the factor 20.5. It is seen that at first the induction increases very 

 rapidly and nearly linearly. Then after a sharp bend the curve ap- 

 proaches a maximum induction asymptotically. It is interesting to 

 see how for higher currents this maximum is reached very much sooner 



TABLE III. [Figure 7.] 



October 4, 1906. 



Diam. = 1.270 cms. = 1/2 in. 



Reversals. 



than for lower currents. As regards curvatures, the sharp bend, and 

 approach to a maximum value, these curves bear a close resemblance 

 to the magnetization curves, when plotted on the / vs. H' plane. 



See Figure 10 for the magnetization curves accompanying Table V, 

 October 20, 1906. These are also quite steep. 



