414 



-éio'-eo'-^o'^o' o' 20" ^o° 6ü° <so° 7oo° /20" /w/éo'fso' Temperature 

 Fig. 3. 



§ 3. ValiU's of the Temperature-coefficients of the molecular Sur 

 face-energle n of the liquids here studied. 



Cyclohexane. 

 Temperature- in terval : 



dfi 



dt 



in Erg: 



between 9' and 80° 3,32 



This value is remarkably great; the 

 curve is almost a straight line however. 



Toluene. 



between -7P and —21° 3,40 



—21 „ 66,6 2,27 



67 „ 86,5 1,90 



86,5 „ 109 1,76 



Bensene. 



Temperature-interval : 



between 5°,4 and 25°, 1 

 25 „ 55 



55 „ 74,6 



para-Xylene. 

 between 25°,5 and 45° 

 45 „ 86 

 86 „ 106 

 106 .. 126 



Öf^ . 



d« 



in Erg: 



2,73 

 2,20 

 1,85 



2,53 

 2,43 

 2,21 

 1,71 



