nESEAKCHES ON EVAPOKATION AND DISSOCIATION. 323 



found it to increase with alcohol and with other as the 

 temperature fell. With ether the increase was found to 



M0° 



U M kl) so 



Kig. 2. Viipoiu- UeuBitios of Alcohol (11 = 1 at t" and p mm.). 



1)0 continuous to the lowest observed temperature, 13°; 

 whereas with alcoliol it becomes practically constant below 



mo' 



joecaior/r' seo 100 ji 



Fig. 3. Heats of Vaporization. 



about 20° (Fig. 3). Our calculated numbers correspond well 

 with direct measurements by various observers, at the boil- 



