Maximum or Minimum Vo 



ipour- 1 vessure \ 



125 



sation loops*, so that we could with safety apply the method. 

 The vapour-pressures contained in the table are thus inter- 

 mediate values between the smallest and largest, but much 

 nearer the latter, as the greater part o£ the mixture was liquid. 

 One of the mixtures selected is the maximum mixture at 

 the critical point, mixture A (30 per cent.) ; the other one, B, 

 we had intended to be the 45 per cent, mixture, but by mis- 

 take we prepared a 50 per cent. one. It will be seen from 

 the tables (VII. & VIII.) that the pressures of mixture A are 



Table VII. — Vapour-pressures of mixture of equal volumes 

 of Carbon Dioxide and Ethane. 



Temperature. 





Pressure. 



+ 17-8 



5617 





14-8 



52-71 









37-21 





- y-48 



29-42 





20-83 



21-85 





32-22 



15-75 





3290 



15-29 



Larger Volume. 



— 



15-39 



Small „ 



40-94 



11-66 





47-48 



9-60 





56-80 



6-90 





58-61 



6-44 





60-54 



5-97 





62-69 



5-488 





65-17 



4950 





68-11 



4-332 



Solid and Liquid. 



6939 



4-066 





78-38 



2-721 



>5 J> 



Table VIII. — Vapour-pressures of mixture of three 

 volumes of Ethane to seven volumes of Carbon Dioxide. 



Temperature. 





Pressure. 



+ 18-85 



60-64 









38-93 



! 



9-26 



30-76 





20-80 



22-41 





3215 



1602 





32-75 



15-37 





4M5 



11-92 





47-60 



9-56 





5632 



695 





60-54 



5-97 





62-65 



5-426 





62-79 



5-25 



Solid & Liquid (large volume). 



64-63 



5-058 



,, ,, (small volume). 



68-07 



4-337 





78-17 



2-6.")7 





Phil. Mag-. [5] xliv. p. 188. 



