a Mixture of Carbonic Acid and Nit< 



449 



0°. 



10 



°. 



30 



o 



50°. 



v. 



Mixture 



Pure 

 Gas. 



Mixture. 



Pure 

 1 Gas. 



Mixture. 



Pure 



Gas. 



Mixture. 



atm. 

 56-53 



Pure 

 Gas. 



atm. 



atm. 

 45-33 



atm. 



atm. 

 47-60 



atm. 



atm. 

 5210 



atm. 



0-02000 



54-24 



34-4 



57-15 



41-8 



62-87 



48-3 



68-50 



54-5 



001636 



66-28 



34-4 



70-16 



44-4 



77-78 



55*5 



85-24 



63-8 



0-01300 



82-74 



344 



88-21 



44-4 ; 



98-91 



62-8 



109-35 



74-5 



0-01000 



102-78 



34-4 



110-66 



444 ; 



125-96 



68-3 



140-84 



84-8 



000768 



129-73 



34-4 



141-62 



44-4 ' 



164-72 



70-7 



187-03 



94-7 



000578 



17039 



344 



189-43 



44-4 : 



226-27 



70-7 



261-71 



104-8 



000428 



25127 



34-4 



280-40 



44-4 



345-44 



71-5 



404-96 



125-3 



0-00316 



It will be seen that these isometrics have much of their 

 general features in common with those of pure carbonic acid 

 and ether* nnder conditions far apart from their critical points. 

 Several obvious remarks which arise from such a com- 

 parison are left to the reader^ 



The following table, which contains the average values of 

 (dpfdt) v , was constructed from the preceding ; — 



m. 



V. 



0°-10°. 



10°-30°. 



30°-50°. 



0-02000 



0-228 



0-225 



0-222 



0-01636 



0-291 



0-286 



0-281 



001300 



0-388 



0-381 



0-373 



o-oiooo 



0-547 



0-535 



0522 



000768 



0-789 



0-765 



0-744 



000578 



1-190 



1-155 



1-116 



0-00428 



1904 



1-842 



1-772 



000316 



3-213 



3-102 



2-976 



In the abstract already referred to, Andrews gives a few 

 measurements relating to a mixture of about 11 volumes of 

 carbonic acid and J. volume of air, and remarks that " the 



* W. Eamsay and S. Young, Phil. Mag. 1887, vol. xxiii. 

 Phil. Mag. S. 5. Vol. 36. No. 222. Nov. 1893. 2 H 



