106 



PROCEEDINGS OF SECTION A. 



were obtained with wave Forms of 11 which steadily departed more 

 and more from the sine form as the induction increased. 



It is worth noting, however, that in the series represented in 

 Fig. v., i, is concave to the B, axis, />. is a straight line, and is there- 

 fore linear in B,, while b^ is convex to the B, axis. 



l\.ll 



T 



or 



On the same diagram the corresponding phase angles i/',, i//^, \p^ of 

 A3, Jj, &, are plotted, and the curves show the gradual slipping back- 

 wards along the time axis of the rising points of the i,, />., h^ sine 

 curves towards the rising point of the B, sine curve as the induction 



