a Mixture of Carbonic Acid and Nitrogen. 



451 



0°. 



10°. 



30°. 



50°. 



p. 



Mixture. 



Pure 

 Gas. 



-. r . , Pure 

 Mixture. n 



Gas. 



T./T- , Pure 

 Mixture. n 



Gas. 



Mixture. 



002273 

 01487 

 01099 

 0-00869 

 0-00720 



Pure 

 Gas. 



001793 

 001125 

 000793 

 000604 

 1 00489 



002100 

 0-02047 

 002020 

 0-01992 

 0*01966 



0-01896 002290 

 001205 002173 

 0-00864 0-02130 

 000666 02096 



00542 0-02060 



1 



002090 

 0-01352 



0-00988 

 000775 

 0-00637 



001550 



000292' 



i 

 000255 



00240 



000230 



0-01840 

 000996 

 0-00491 

 0-00316 

 0-00279 



atm. 

 50 



75 



100 



125 



150 



XdtJp 



p. 



C -10°. 



10°-30°. 



30°-50°. 



atm. 

 50 



0000103 



0-000097 



0-000091 



75 



0-000080 



0-000074 



0-000067 



100 



0-000071 



0000062 



0-000055 



125 



0-000062 



0000056 



0-000047 



150 



0-000052 



0-000047 



0-000041 



T 2 — 



Sundry Remarks. 



Could we, as is often done, make use of equation (1) far 

 beyond the region of direct measurements, the critical point 

 would be given by the following equation: — 



A K 



27*(«4-/3).R' 



which gives in the present case T = 222 0, 55 ; accordingly the 

 critical point of the mixture under consideration would be 

 — 50 o, 45. As already mentioned, Andrews found it to be 

 below -20°. 



One effect of an admixture of carbonic acid with a gas like 

 nitrogen is that isothermals of the former are somewhat de- 

 formed*. It seems to me likely, but requires to be decided 



* One sees this very clearly even from a few measurements of Janssen 

 on nitrous oxide at 25°-15 and 32°-2, as well as from Andrews's on carbonic 

 acid at 13°1 and 21°-5. 



2H2 



