the Nature of Liquids. 



133 



perature (see figs. 2 & 3). It may be mentioned that direct 

 observations by Bineau at 20° give nearly the same value. 



Fie. 2. 



Vapour-density (H = l at t° and^> millim.). 

 Acetic Acid. 



The curve representing heats of vaporization of acetic acid 

 at various temperatures also differs entirely in form from those 

 of alcohol and ether, for it exhibits a maximum at 110°, and 

 decreases both with rise and with fall of temperature. It is 

 difficult to draw any conclusion from a comparison of our 

 measurements of this quantity at the boiling-point under at- 

 mospheric pressure with those of other observers ; but it may 

 be stated that our result differs far less from the observation 



o 









Fig. 3. 











yu'j 

























y 















o 













o 







0/ 



f 













/ 







2 

 3 









0° 





/ 









1 







of Favre and Silbermann than theirs does from that of 

 Berthelot (see fig. 3). 



