Relation, of Temperature and Molecular Attraction. 85 

 Table I. 





; Ethyl 



Di-iso- 



Di-iso- 



Isopen- 



Normal 



l 

 Normal 





oxide 



propyl 



butyl 



tane 



pentane 



hexane | 



Mean ft' 



103-8. 



96-48. 



87-72. 



1055. 



1100. 



102-80. 



Temperalure 



+ 





+ 



+ 



4- 





0°C. 



105-6 

 4- 



97-8 



89-1 



107-2 



111-1 



103-6 



10 



104-8 











104-5 







20 



103-9 



— 



— 



105-1 



— 



— 



30 



103-4 



_ 





1051 



108-6 







40 



1030 





_ 



104-8 



109-4 



_ 



50 



lOi-9 



97-9 



. — 



104-7 



109-3 



— 



60 



102-9 



97-9 



j — 



104-5 



1096 



102-4 



70 



102'7 



980 





104-4 



1097 



102-7 



80 



102-9 



981 



— 



105 



109-8 



103-0 



90 



103-2 



97-8 



87 9 



105 4 



1099 



103-0 



100 



103-6 



976 



87-4 



105-9 



1100 



103-1 



110 



103-8 



975 



80 8 



1060 



UO-5 



4- 



103-4 



120 



1041 



97-6 



860 



106 3 



111-1 



103-5 



130 



104-6 

 4- 



97-5 



86-0 

 — * 



106-5 



4- 



111-0 



103-4 



140 



105-0 

 + 



97-5 



r-1 



106-7 



4- 



110*5 



103-0 



150 



105-1 



97-5 



84-7 



— -* 



106-9 



110-5 



103-1 



160 



104-0 



97-7 



850 



106 7 



110-3 



102-5 



170 



103-5 



97-7 



— # 

 85-6 



105-5 



110-3 



102-4 



180 



1019 



— * 



98-0 



86-2 



103-4 



1093 

 — * 



102-6 



190 



974 



98-1 



86-8 



— 



106-3 



102-8 



200 



— 



98-1 



87-0 



— 



— 



102-7 



210 



— 



97-3 



87-3 



— 



— 



1021 



220 



— 



94-8 



87-9 

 + 



- 



— 



101-1 

 — * 



230 



— 



— 



88-6 

 4- 



— 



— 



98-0 



240 



— 



— 



89-0 



+ 



— 



~ 



— 



250 



— 



— 



89-5 



+ 



— 



— 



— 



260 



— 







89-4 







— 



— 



270 



280 



— 



— 



876 



— 



— 



— 



: 



I Critical tem- 















perature 



193°-8 



227°-35 



276° -8 



187°-8 



197°'2 



234° -8 



Average ft' 



103-76 



97-53 



87-58 



105-46 



109-94 



102-80 



n' from 















dP 2E 















dT~ V 



102-0 



96-5 



80-7 



1070 



109-4 



99-2 



