of the Liquid and Gaseous States of Matter, 683 



tetrachloride and ethyl propionate, and are contained together 

 with the values of — r, in Table IV. It will be seen that 



PI- Pa 



Table IV. 



Carbon tetrachloride. 



L 



1812 



19-31 



19-47 



19-65 



19-73 



20-00 

 21-31 



20-01 



2028 



20-54 



20-4 



1963 



Pi 2 -P 2 a 



L 



21-34 ! 



21-77 



21-74 



21-69 



21-53 



21-31 



21-30 



21-23 



20-77 



19-54 



po/3— p5/3 "'■ 



Ethyl propionate. 



L 



108-9 



114-7 



1150 



114-8 



1150 



]116-5 



1183 



118-9 



1168 



1 

 113-8 



! 



899 





Pi -Pi 



L 



1141 



105-6 



104-8 



102-4 



101-1 



101-3 



100-2 



99-4 



95-4 



^5/3-^5/3-' 



the values of the former expression are more constant than 

 those of the latter for carbon tetrachloride, but the opposite 

 is the case with ethyl propionate. The equation for the latent 

 heat according to the former expression is 



It appears therefore that in some cases this equation will be 

 in better agreement with the facts than equation (9), while 

 in other cases equation (9) will be in better agreement. 

 Since P n =Up, we may now write 



P„=42x 2073^(2^)*, 



and the equation of state becomes 



/> + 8'066^(S^)'-- ( g^, • • 00) 



taking b first of all as constant. From the equations 



