352 



Specific Surface-energy ■/_ 

 in Ergs pro c.m2. 



10° 



10° 



20' 30' 40' 50° 60' 70 80° 90° 100' Temperature. 



Fig. 8. Surface-tensions of pure water and colloidal solutions 

 at different temperatures. 



Although acetic acid doubtless is a gradually dissociating liquid, 

 and in accordance with this manifests only a small temperature 

 coefficient of p, this last remains constant, contrary to the cases, 

 where the curves appear to be concave or convex. 



