SOLID SOLUTIONS 81 



It appears that the concentration (--) is not proportional 



to the pressure, for - = pv (where v c.c. Pel, containing 

 2 nig. H) varies from 808 to 303-5. On the other hand, 

 v Vp is remarkably constant, as the fourth column shows. 

 This means proportionality between the pressure and the 

 square of the concentration, and from what precedes, makes 

 it probable that the hydrogen is not at present dissolved 

 as H 2 but as H, thus confirming the main conclusion that 

 the solid state is not due to great molecular complexity. 



