SHUDDEMAGEN. — DEMAGNETIZING FACTORS FOR IRON RODS. 213 



applied field W 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 1 plane. 



See Figure 10 for the magnetization curves accompanying Table V, 

 October 20, 1906. These are also quite steep. 



