LUEDEKING PHYSICO-CHEM. STUDIES IN FATTY ACID SERIES 629 



It will be seen that the maximum of condensation takes place 

 in the formation of the third hydrate, to which the curve gradu- 

 ally rises, and from whence it falls very precipitately at first, and 

 then more slowly and gradually in its approach to the zero line 

 of no condensation. 



Propionic Acid, 



Determinations made at 25° C. 



The boiling point of the propionic acid was 140.5° C. corrected. 



For propionic acid an inspection of the curve will show that 

 its hydration is attended with a maximum of condensation at the 

 fifth hydrate, from whence on the curve falls at first very rap- 

 idly and then more slowly in its approach to the zero line of no 

 condensation. 



