60 Profs. J. Dewar and J. A. Fleming. Changes produced in 



doo- 



7oo 



600- 



5oo 



400- 



3oo 



200 



loo 



FIG. 1. Knitting-needle steel (glass hard). 



slowly. In this case, however, the first diminution of magnetic 

 moment was still greater. On first immersion in the liquid air 

 the magnet lost about 33 per cent, of its moment. On allowing 

 it to heat up again to 5 C. it still further diminished in moment, 

 and from and after that point it arrived soon at a permanent 

 condition, in which its moment, when cold, was greater than its 

 moment when warm by 30 per cent, of its moment at 5 C. These 



