144 Mr. R. H. M. Bosanquet on 



of n till after the point where w = 6 ; after which the moment 

 falls below the linear value. 



Bar A. 



Curve of Total Moments, n pieces in each of the m bars into which the 

 whole is divided. 



Bar A. 



Curve of Induction (intensity), in equatorial section of bar of n pieces. 



The moments were measured in the bifilar and the torsion- 

 balance. They were originally measured in the bifilar with 

 all the pieces in one tray in each state of combination. The 

 discrepancy then found between the limiting moment and the 

 moment of the current-turns required for temporary demag- 

 netization (see post.), gave rise to the suspicion that the induc- 

 tion between the pieces dispersed about the tray was not 

 negligible. The measures were then repeated, the smaller 

 combinations being taken three together. The numbers thus 

 obtained are those above given. The accordance with the 

 temporary demagnetizing force being still imperfect, though 



