224 Mr. E. Wilson. The Groivth of Magnetism in 



(No. 5) E.M.F. In the second case the areas inclosed by Nos. 1 and 

 2 coils oppose, and the average suffers accordingly. 



It is of interest to see what effect raising the temperature of the 



Fig. 8. 



magnet would have upon these induced currents. The magnet was 

 heated by placing Fletcher gas furnaces around it. The heat was 

 applied for about 1J hours, and the magnet allowed to cool. The 

 electrical resistance of the No. 1 coil was measured, and when it 



