■208 



PBOCEEDIH :ili: AJGBBICAH ACADEMY. 



account, reckoning therefore the distance in any unite of length, Bay 

 millimeters, from the Dormal curve to th ie for m = .".<><i as our un- 

 known .r, we shall find the whole Bel of equations giving a good aver, 

 value for as, and thus we may construct what might be called "the 

 normal curve based on m = 300." Now if we use only the curves for 

 •_'.*)<> to L50, BO that our next a? is the unknown distance from normal 



10 IB 



Figure 6. [Table II.] 



so 



Reversal magnetization curves for a Bessemer soft Bteel rod of diameter 

 0.6350 cm. 



curve to the curve of 250, we shall again find values for a: which satisfy 

 all the equations moderately well. But the normal curve thus deter- 

 mined, which is the normal curve based on m = 2."><> ( will lie slightly 

 to the right of the first one constructed, — at least every case trie' 1 gave 

 this result Similarly, the normal curve based on ni = 200 will lie to 

 the right of the one based on in = 250, and bo for the one based on 

 17.">. For higher values of A' than 8000 the formula fails to hold at 



