258 



SOLID HYDROGEN. 



forinor lectures the relation of electrical resistance to temperature has 

 been discussed, and it was experimentally demonstrated that the curves 

 of resistance of the pure metals all pointed to this qualitj' disappear- 



ing or becoming exceeding small at the absolute zero. This fact has 

 been confirmed, even with the most highly conducting metals, down 

 to the lowest temperature we can conunand. The experiment illus- 

 trated in fipf. 9 shows to an audience the diminution of resistance of 



