64 



THE ROYAL SOCIETY OF CANADA 



110 



100 



fO ZO Ô0 4-0 Ô0 60 70 QO 90. fOO- 



% Methane 



r =the ratio, in vapour 



% Nitrogen 



was found to hold very approximately, the constants in this case being: 



a= -0-47 

 b= +0-85 



as obtained from the graph. 



This relation was used to obtain a more complete and smoother 

 series of results. The corresponding temperatures were taken from the 

 temperature composition diagram. Such a series (proceeding by two- 

 degree intervals) is given in Table II. 



