1094 
was noticed, when the pressure was somewhat lower than that 
required to produce the cloudy condensation, and sometimes persisted 
during the stirring. By a rapid movement of the stirrer the opal- 
escence could as a rule be changed into a mist. Pure oxygen and 
argon do not seem to show opalescence. ’) 
Condensation-constants. Our results as regards temperature and 
pressure, are given in Table I and in Figure I. 
TABLE 1. 
t Pp | Po 
—140.63 | 37.17 | 31.17P. of C. 
— 140.64 | 37.12 37.24 
—140.69 37.02 37.26 
—140.73 | | 37.25 P. P. 
—140.74 | 36.99" ELK 
—140.75 36.86 
— 140.80 36.65 | 37.20 
— 140.80 36.70 
— 140.835 36.68 
—-140.85 36.75 37.18 
—140.89 36.57 
—140.99 36.35 
—141.35 | 35.24 | 36.49 
—141.99 | 34.58 
—142.35 | 33.91 | 35.31 
143.14 32.06 
— 143.34 | * 31.85 33.79 
—144.12 | 31.06 33.12 
144.35 | 32.52 
— 146.32 | 29.83 
— 150.12 23.68 25.04 
1) See Comm. 1455. 
