112 



THE ROYAL SOCIETY OF CANADA 



condense and the only pressure recorded should be the vapour pressure 

 of methane at liquid air temperature which, as mentioned above, is 

 between 6 and 7 cm. of mercury. 



If the 1200 cc. of gas passed in is largely methane but contains 

 ome nitrogen, then if the nitrogen is insoluble in methane it should 



to 



30 



36 

 31. 

 32 



Co 2a 



^ 26 





o ( z 2 ^ s (, 7 8 s to II /a li If- fs tù n 's 19 20 



VOLUME OF OAS 



UNIT ' liOOt.c 



Figure 2 



exert its pressure independently of the methane. If x% for example 

 is nitrogen, then 12 x cc. is the volume under atmospheric conditions 

 and the nitrogen pressure in G should be given by 



16/? = 12x 



or ^ = f X 

 Therefore, the pressure after the first collector has been passed in 

 should be 63/^ + %x and the pressures after 2, 3, 4, etc. collectors 

 should be 63/9 + Ux, 63^2 + 2ix, etc. This neglects the alteration 



