JI7 



of Kameriinüh Onnes and Oosterhuis: 



§ 4. Conclusion. The data treated in § § 2 and 3 lead to the 

 following conclusion : 



The susceptibility of oxygen in liquid mixtures of oxygen and 

 nitrogen as well as that of liquid oxygen can be represented within 

 the degree of accuracy of the observations with the aid of the 

 application of the quantum-theory to paramagnetism as expressed 

 by equations (1) and (4). 



The agreement between observation and calculation (particularly 

 if the susceptibility of liquid oxygen is also considered over the 

 whole range of temperatures^ is somewhat better with the application 

 of the quantum-theory than with the introduction of a negative mole- 

 cular field alone: indeed Perkier and Kamerlingh Onnes find it 

 necessary for the mixtures of oxygen and nitrogen also to change 

 the value of the CuRiE-constant. Calculations made for liquid oxygen 

 support this conclusion. Nevertheless it is quite possible that for liquid 

 oxygen also if a changed CuRiE-constant is assumed just as good an 

 agreement may be obtained by the introduction of a iiegative 

 molecular field. 



§ 5. Dependence of the c I u mieter istic zero-temperature on the 

 densltij. Table IV shows more particularly the manner in which ^f^ 

 depends on the density q of the oxygen. 



From the last column the conclusion may be drawn that for the 



tiloq 8 ,. , I • • 



higher densities '- — approaches to 7s- ''<-*^* >hose densities we 



Lx log () 



may therefore write as a limiting law : 



8, = ao'U, , • (Ö) 



