General Discussion of Results. 
429 
Kawalki 1 found that the diffusion coefficient of a number of 
substances in ethyl alcohol is 0. 34 times as great as in water. 
Vollmer 2 from his work observed that the conductivity in ethyl 
alcoholic solutions at 18° C. is approximately 0.34 times as 
great as in aqueous solutions, while his empirical factor for 
methyl alcohol is 0.73. In general, then, limiting values can 
be obtained for /x in methyl and ethyl alcoholic solutions. 
In other alcoholic solutions no such uniformity seems to exist.. 
This is perhaps best illustrated in the case of solutions in 
propyl alcohol. The molecular conductivity of solutions in this 
solvent are represented in Plate V. The determinations are 
from Schlamp’s 3 work with this solvent. 
It will be noted that lithium salicylate is the only salt the 
conductivity of which appears to approach a limiting value. 
Schlamp does not hesitate, however, to assign values for ^oo in 
all cases and from the platted results this seems hardly justifia¬ 
ble. 
The conductivity has been found to increase with the tempera¬ 
ture. In my determinations with both allyl alcohol and benzyl 
alcohol this was also found to be the case. (See quantitative 
results—Tables IV and V. ) 
Raoult found that the vapor pressure of alcohols is very 
slightly lowered by the addition of the dissolved substance. The 
subject has been further investigated by Woelfer, who finds a 
considerable rise in the boiling point of methyl and ethyl al¬ 
cohol when various substances are added. The calculated val¬ 
ues are usually lower than the theoretical values for the molec¬ 
ular weights of the dissolved substances. In methylic alcohol 
solutions the degrees of dissociation as calculated from the boil¬ 
ing point determinations, show closer agreement with those ob¬ 
tained by the conductivity method than in the case of the other 
alcoholic solutions. In the following table from Woelfer are 
given the values of the degree of dissociation, a, as calculated from 
the boiling point determinations of Woelfer and the conductivity 
measurements of Vollmer. 
1 Wied. Ann., 52, 300; 1894. 
2 Ibid., 52, 328; 1894. 
3 Zeit. phys. Chem., 14, 272; 1894. 
