224 Dr. D. K. Morris on the Magnetic Properties 



standardizing throws were observed before the readings at 

 each temperature, and in this way direct compensation was 

 made for alterations in the resistance of the secondary circuit. 



The standardizing throw and the numerical data of the 

 iron ring-magnet being known, it was possible to obtain from 

 each ballistic observation the change of magnetic induction 

 in the iron core to which it was due; correction being of 

 course made for the induction which did not pass through the 

 core. 



