590 



Heat Problems. 



[Jan. 19, 1912] 



is shown (Fig. 10). The problem of specific heats has been exten- 

 sively studied by Nernst, who has shown that they would probalily 

 disappear before the absolute zero is reached. This result has given 

 rise to various theoretical speculations as to its cause, and in all 

 probability the solution will be found in the development of the 

 electron theory. At the temperature of boiHng helium Kamerlingh 



scf 



100° 



ISO zoo 



Absoluts Scale 



Fig. 10. 



Onnes has found that the electrical resistance of gold, mercury, 

 and platinum vanish. Thus, pure metals lose both specific heat 

 and electrical resistance below 4° Abs., suggesting that in this as yet 

 unexplored region existing theories fail. The properties of matter 

 at the absolute zero remains a purely speculative problem. 



[J. D.] 



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 GREAT WINDMILL STREET TV.. AND DDKE i^TKEEl . STAMFORD STREET. S.: 



