14 ART. 9.— H. XAGAOKA, AXD S. KUSAKABE. 



To ascertain the temperature at which this singular phenome- 

 non takes place, a small hole was bored axially through a tungsten 

 steel cylinder, into which the therm oj unction could be introduced. 

 Heating the cylinder to 900° and then leaving exposed to the 

 air (at 21°), the temperature of the metal during the cooling 

 process was observed with the time; Fig. 13, PL II. At 660,° there 

 was an increase of temperature for a few minutes, and then a 

 gradual decrease. This point is marked by a conspicuous promi- 

 nence in the curve of cooling. At somewhat lower temperatures, we 

 notice slight corrugations in the temperature curve, which may 

 have some connection with similar features presented by magne- 

 tization. The approximate coincidence of the temperature of re- 

 calescence with that of steep ascent in magnetization leads us to 

 the conclusion that they are both due to the establishment of a 

 certain molecular arrangement at that temperature. Whether the 

 temperature at which recalescence sets in depends on the magne- 

 tizing force, which evidently affects the cooling curve of magne- 

 tization, is a question still to be solved. 





