﻿594 



Mr. T. Carlton Sutton on the 



and 



As shown in the Appendix, this leads to the results 

 L = t(v 2 -v 1 ){B log a . a' + log ff . £'} 





(_I L_\ 



\rj-6 v 2 -bj 



\db 

 di 



(B) 



respectively, where L, t^and v 2 are the molecular latent heat, 

 molecular volume of liquid and molecular volume of vapour 

 at temperature t, b is the van der Waals' constant closely 

 connected with the volume actually occupied by the molecule, 

 and R is the gas constant. 



The following table compares the results so calculated 

 with such experimental measurements as have been actually 

 made. The latter are meagre, and have been made at the 

 boiling-points (under one atmosphere pressure) only. 





1 



L (per gx'm.) Calculated. 



L 



Obsd. 







Temp. 



Mills- 



Applebey & 



Date, &c. 







Young. 



Chapman. 







Ethyl Ether 



34°-5 C. 



68°-0 



84-13 

 79-51 



87-3 

 79-5 



88-4 

 79-4 



Wirtz, 1890. 

 Mabery and 



Hexane 













Goldstein, 1902. 



Heptane 



98° 

 124° 9 

 125° 



762 



70-75 

 70-74 



761 



68-4 

 68-4 



'74-0 



7092 



711 



M. & GL 1902. 

 Longuinine, 1895. 

 M. & G., 1902. 



Octane 





Hexamethylene ... 



70° 



88-5 



86-0 



87-3 



M. & G., 1902. 



Benzene 



80° -1 

 80°-35 



95-43 

 95-39 



94-8 

 94-8 



92-91 

 93-45 



Wirtz, 1890. 

 Schiff, 1886. 





Stannic Chloride ... 



112°-5 



31-0 



30-6 



3053 



Andrews, 1848. 



Methyl Formate ... 



32° -9 



1134 



118-8 



115-2 



Berthelot and 

 Ogier, 1881. 





32°-5 



113-52 



118-9 



110-45 



Brown, 1903. 



Ethyl Formate 



54°'2 



97 04 



95-8 



100-4 



B. & O., 1881. 





54°-2 



97-04 



95-8 



100-1 



Brown, 1903. 





53°-5 



97-18 



96-0 



92-15 



Schiff, 1886. 



Propyl Formate . . . 



81°-2 



87-19 



88-4 



85-25 



Sahiff, 1886. 





81°-2 



87-19 



88-4 



90-36 



Brown, 1903. 



Methyl Acetate 



57° -3 



9906 



105-3 



93-95 



Schiff, 1886. 





57°'3 



99 06 



105-3 



98-26 



Brown, 1903.' 



Ethyl Acetate 



73°1 



86-88 



88-6 



84-28 



Wirtz, 1890. 





74° -0 



86-76 



88-5 



1050 



Schall, 1884. 





77°0 



86-27 



88-0 



83-1 



Schiff, 1886. 





77°-3 



86-22 



88 



88-37 



Brown, 1903. 



Propyl Acetate 



102°-3 



79-44 



80-7 



77-3 



Schiff, 1886. 





102°-3 



79-44 



80-7 



80-45 



Brown, 1903. 



Methyl Propionate . 



80°-0 



87-07 



88-6 



84-15 



Schiff, 1886. 





78°-95 



87-26 



88-8 



890 



Brown, 1903. 



Ethyl Propionate... 



98° -7 



79-4 



798 



771 



Schiff, 1886. 





99°-2 



7933 



79-7 



803 



Brown, 1903. 



Methyl Butyrate ... 



93° 



790 



81-6 



860 



Schall, 1884. 





102°-3 



77-40 



80-0 



77-25 



Schiff, 1886. 





102°-5 



77-36 



80-0 



79-75 



Brown, 1903. 



Methyl Isobutyrate. 



92°-5 



75-93 



75-6 



75-5 



Schiff, 1886. 





92°-4 



75-95 



75-6 



790 



Brown, 1903. 



